The basic difference between a shaper and a planer is that in the shaper tool is reciprocating and the work piece is held stationary, but in the case of a planar, the work piece reciprocates and the tool is given the feed. And due to this difference, smaller work piece are handled on shapers and larger jobs are performed using the planer.

Now we will discuss about some basic parts of a planer.

Bed
Planer bed is a very strong and robust structure made out of cast iron and strengthened with cross ribs. If the planer is big, the bed is made by blot joining two castings made to make the bed. It should be noted that the length of the bed is twice to that of the table of the planer, for, the table has to make a complete stroke of the bed length. For installation and mounting of the bed, leveling pads and jacks are provided under the bottom of the bed. A new planer or new foundation should be re-leveled at least once a week for this first month. And after that, periodic examination should be carried out with frequency according to the stability of the foundation.

Table
It is box like ribbed structure and sufficiently strong to take cutting forces and the weight. It reciprocates over the bed-ways and its top surface is finished accurately to it by tightening the clamping bolts in the T-slots provided throughout the table length. To do accurate work, the planer table must be kept free of scratches, dents, and burrs. A group of holes is drilled and reamed into the tabletop at regularly spaced intervals, and stop pins for clamping the work piece are placed in these holes. Table may also be single casting or may be divided in several units bolted together. At either end of the table, a trough is provided to collect chips and also sometimes utilized for supporting the overhanging jobs.

Upright or Column
These are provided for carrying horizontal cross-rail and are fastened to the sides of planer bed. In order that the cross-rail may travel on the columns, the front face of each upright is well machined and scrapped. The cross-rail can be held in any position with the help of clamps. Vertical feed shaft, cross-rail elevating screw, and feed bar for cross-bed, etc., are accommodated within the body of uprights.

Cross-rail
It is a sound structure mounted horizontally on the vertical ways of the columns and carries the tool feeding arrangements on it. Cross rail can be clamped on the columns at any desired height by clamps, which may be operated manually, hydraulically or electrically. It may be moved vertically up and down by elevating screws accommodated within the column. A horizontal shaft carrying the bevel gears on its end is placed at the top of the column. The cross-rail carries two saddles with tool head mounted on each, and for this purpose the cross-rail face is properly machined and scraped. For down feed of the tools, the feed screws are enclosed in the cross-rail.

Tool head
Normally two tool-heads are mounted on the saddle fitted on the ways of cross-rail and are operated independently. The tool head carries a tool post in which the cutting tool is held. The tool post is hinged at the tool head for lifting the tool in the return stroke. The clapper box can also be adjusted at an angle whenever desired.

Control
The controls for governing the various actions of different parts of a planer are provided in centralized plane. From this central location, the operator is able to obtain very close control of all cutting tools. The various controls included are start, stop, automatic cut, automatic return, inch cut, inch return, and table speed reducer, etc.

There are a large number of shapes that are possible to be cut on a planer and this is mainly due to the number of holding devices that are available for the planer. There are also various clamping devices that are available for the work and these may include bolts, clamps, clamping blocks, shins, planer jacks, braces, planer poppets, stops, toe-dogs, planer strips, V-blocks, and angle plates, etc. In any planer set up, it should be ensured that the work is clamped neatly and securely. It is always advisable to use a stop, if possible. There are some basic precautions that are needed to be addressed for the proper functioning of the planer:

The vise jaws, parallels, and angle irons used should be accurate and their accuracy tested.

The finished surfaces should be protected from the roughness of a clamp.
While handling rough casting, the surface of table, vise jaws, and angle irons, etc., should be protected by using protected pieces of cardboard, etc.
All chips and dirt should be removed beforehand.

After a piece is clamped in a vise, tap lightly with a Babbitt hammer to seat it. Once work is seated, do not tighten vise again as same would only lift the work from its seat!

Use a stop against work wherever convenient.

Avoid unnecessary clamping.

It should be ensured that work is clear under cross-rail and along the sides next to the housings.

Proper sized wrench should be used to avoid rounding of corners of the nuts.

A washer should be placed between the nut and the clamp.

Plan for planning several pieces at a time.

Work should be shimmed or blocks, particularly under the clamps, used to avoid springing and ensure proper seating.

Rough castings should be supported at the proper points by blocks, shims or braces so that it will not buckle or spring under the clamping pressure.

Casting for planning must be leveled with surface gauge in such a way as to average the corners for height, with due consideration for later planning of the other side.

Remember that the screw pressure of bolts and nut will spring even a heavy casting unless it is solidly supported under the clamp.

Dogs should be set for proper length of stroke.

Proper tool should be selected and set.

The edge of the work may be beveled with a chisel or an old file to prevent a ragged corner.

It is important to note all the precautions while working on a planer, for, if the work piece and tool are set and the machine is working, you will not be allowed to change the setting: you will have to stop it and then reset!
Almost all the power tools require a lot of precautions and it is better to know about these precautions and use them beforehand.

It should be noted that there are also planers, which are used for planning the surfaces of wood. There are manual planers and power planers that are recently developed for bigger jobs and people use them even for smaller work. In these power planers used for woodwork, the tool is revolving and the work is fed into it. The speed of the tool is high and the cutting and removal of the wood is smooth to impart a perfect surface, which is required.

Being a mechanical engineer, I have worked on both types of the planers and we made some jobs using these tools. The power planer that is used for woodwork can be often seen in use with the carpenters that are in the city. Though the planer for metal removal are not that very frequent in sight!
The planer used for woodwork has a little incident in my degree course, when we had to make a piece of wood and planning the surface of the wood piece with manual planers. We were given small pieces of wood and we had to make the surface plane. We knew that it was a Herculean task and the girls with us--of course not from mechanical branch--were tired to length about this operation. The whole responsibility of planning those surfaces fell on the shoulders of us boys. But our instructor was a considerate man and he knew that it would be almost impossible for us to do that job, leave alone the question of doing the whole work. So when the workshop superintendent was a little away, he started the power planer and had all the surfaces planed with it and then handed the jobs to us to complete the work. It came to us as a relief, and we were saved from that hectic work. However, it was not a good thing for him to do, but at that very juncture, nobody resented but the move was welcomed, for, the temperature of the atmosphere was above 40 degree and to do that exercise of arms at that time was literally life-taking! Nevertheless, it was okay with us afterwards, as we did the remaining work with our own hands and did not use that power planer again for any surface finish.

The Lathes are one of the most widely used power tools to remove material and to provide desired shape to number of metals. There are a lot of operations that can be done successfully and with relative ease on a lathe, and one of these operations is drilling. And it should be noted that if the hole is very wide, lathe is preferred over a drill. And it is obvious that to perform these various operations, there should be variety of tools. And these tools differ from many points and we shall discuss some main characteristics of these tools and the material used to make these tools.
There are different nomenclatures and standards that are followed across the globe and American standards and British standards differ from one another. We, in this article, will concentrate our details about the American standards and nomenclature, as these standards are also followed in India.

Shank
It is the body of the tool or part on one end of which the cutting edge is formed.

Nose
It relates to the tip of the cutting end.

Face
It is the surface against which the chips bear.

Flank
It is that end surface, which is aligned to the cutting edge and below it when the tool is in a horizontal position as for turning.

Nose Radius
For heavy depths of cut and feeds, and interrupted cuts, the nose is generally given a radius of 1.5 mm in order to obtain higher tool life and better surface finish. However, too large a nose and radius would lead to chatter. The depth of cut should be more than nose radius in order to obtain good surface finish. For fragile work piece, which can not be held securely, nose is generally taken as 0.4 mm.

Rake Angle
The nominal rake angle is the angle between the tool face and a plane parallel to the base of the tool. There is also a Back rake angle, which is measured in the direction of the tool shank and side rake angle in a direction at right angle to the tool shank. The active or effective rake of a turning tool depends upon its position relative to the axis of the work.

Back Rake Angle
It is the angle between the face of the tool and the base of the shank, measured in a plane through the side cutting edge and at right angles to the base. If the tool faces downwards from the point towards the shank, then Back rake angle is +ve, and this positive angle takes the chips away from the mechanical surface. If side cutting edge faces upward towards the shank, then the angle is -ve. This negative Back rake angle is good for the tool, as it strengthen the tool and is used for the work of heavy mechanical work.

Side Rake Angle
It is the angle between the base of the tool shank and the face of the tool measured in a plane perpendicular to the place through the side cutting edge and at right angles to the base. It the tool face is sloping upward towards the side cutting edge, this angle is +ve, and it would be -ve if it is sloping downward towards the side cutting angle. Positive Side rake angle results in lower cutting force and power and thus, better cutting action. Negative Side rake angle is used for roughening up of the cuts and heavy-duty applications.

End Cutting Edge Angle
It is the angle between the end or auxiliary cutting edge and the work axis, and it varies from 0 to 30 degree. It provides the required clearance to the trailing edge and reduces the drag that tends to cause chatter.

Clearance Angle
It is the angle of the end or side surfaces, which are below the cutting edge when the tool is in a horizontal position as for turning. Side clearance angle is the clearance on the side cutting edge, and it is the angle between the portion of the side flank immediately below the cutting edge and a plane is drawn from the cutting edge perpendicular to the base. Similar relief sort of thing is provided on end cutting edge also. The nominal clearance angle may be greater or less than this depending upon the position of the tool relative to the axis of the work. Higher clearance values reduce the wear and result in a clean cut on metal of low strength. Lower values give a better support to the cutting edge and they are suitable for cutting tougher metals.

Relief Angle
Clearance may consist of two angles to reduce the amount of end surface and amount of grinding required in sharpening the tool. In such case, the angle of that surface, which is adjacent to or just below the cutting edge may be called the relief angle. This may also be called as end relief or side relief angle, depending upon the location of the surface.

Cutting Angle
The true cutting angle is the angle between the face of the tool and a line tangent to the machined surface at the cutting point. The true cutting angle depends upon the position of the turning tool relative to the axis of the work.

Lip Angle
It is the angle between the tool face and the ground end surface or flank. If the tool has side and back rake, the lip angle should be measured in whatever plane it is smallest.

Nominal Size
The size of the tool is expressed by giving the width of the shank, the height of the shank and the total length.

Approach Angle
It is the angle between the direction of feed and the side cutting edge. It is the complementary angle of the side cutting edge angle. Its value may vary between 0 and 90 degree or even more! The thickness of the chip depends upon the value of approach angle. For smaller approach angle, the cutting pressure is spread over greater length of the cutting edge and, therefore, tool life is more. Small approach angle increases radial component of cutting force, which has tendency to separate the work from the tool and hence, more chatter. For general turning of the rigid work, the approach angle is used to be about 70 degree. For slender shafts, the approach angle is used to be of 90 degree.

Up to now we discussed in detail the technical specifications and nomenclature about the cutting tools that are generally used to perform various operations on a Lathe. It should be noted that the angles and the nomenclature differs from British to American standards, and you must have the required knowledge about them. These specifications may also help you if you are in the market to buy some of the Lathe tools.
It is general practice all over the globe to follow International standards or the SI specification to make the process easier and acceptable all over the world. This is very necessary and important from the globalization point of view, as the need of uniformity in design specifications is on high demand. But still, there are some areas where no uniformity has been achieved on a global base, and these specifications continue to differ from place to place. But you must know the specification of the area where you have to work and make all your operations.

There are, sometimes, barriers and differences on the basis of language also, as people comfortable with different languages have their own nomenclature for the tool specification, and these different terms sometimes tend to mislead you. And that is why the international bodies are trying hard to provide a universal nomenclature, but still in India, where there are large number of languages spoken by the people of different areas, it is hard to make them use same words and nomenclature!

When I was doing my training of one month and six months during different semesters and in different organizations, I came to know about many words that they used to describe the machines are tools. It sometimes created a problem sort of thing, when they asked me something in their conventional language and I, due to being educated in English, was utterly unable to comprehend the names that they were using. It was more difficult to learn from them and then write the report, for, they told me about the things in a altogether different language and I had to write the report in English. It was a hard task and I had to refer to books to get the names in English that were standardized and accepted everywhere.
So we can see that learning about the specifications can help a lot in daily work and in some particular works where you might have to work under a total diverse atmosphere, and perhaps in an alien language; and the nomenclature used by the persons working there and telling you the things that are more confusing than being understandable!

There are many characteristics of the machine and power tools that are associated with them by the virtue of their design and material prepositions. And while selecting and opting for any work that incorporate these tools, we must consider these characteristics. In this article, we will discuss some of these characteristics to know how mush they can perform for a particular task that we intend to do with them!

Repeatability

This is very important characteristic of machine and power tools! These machine tools are made to produce same dimensions with one setting, repeatedly. This is also known s process capability of machine tools.

Reliability

The mean time between the failure of these machine and power tools is very high. And all the non-wearing parts are designed to be fail proof. And the parts that are subjected to wear and tear and designed so that their replacement can be done easily. This is a very important aspect of design of power and machine tools, and this parameter lends a great advantage to these power and machine tools.

Easy Maintenance

The parts of the power and machine tools that require time to time attention are made easily accessible to the person who has to look for the repair and maintenance of these tools. The most distinguished characteristic of a good power tool is that it is easily serviceable!

Ease of operation

Power tools are designed to be operated easily so that the strain on the operation is least and the persons can easily learn how to handle the tool during operation. The relative locations follow the conventional standards so that there is no chance of mal-operation. Loading and unloading of parts is also made to be easy and simple.

Accuracy

No tool can be declared and labeled good if the accuracy is poor and not reliable. Power and machine tools require high accuracy and they need to be designed with utmost precision. To produce geometrical and dimensional accuracy on the job, the tools must have static stiffness and dynamic rigidity to withstand the cutting forces and other dead loads. The tools are also tested for alignment tests!

Compactness

Compactness and smaller size of power and machine tools is a great advantage for the use and storage of these tools and they outclass other tools in this regard, for, the operation is same but they require lesser space for storage and at the same time are easy to handle!

Safety

Safety is of prime importance for any type of tool and power tools are no exception to this! The power and machine tools are equipped with the guards so as to avoid any type of accidents. There are more things that are done: interlocks are provided in these tools so as to completely eliminate the chance of wrong operation! This is of great advantage to these power tools, and even a new person who is handling these power tools will not be able to do a wrong operation, even if he is not yet able to do the right one!

Production Capacity

Machine and power tools are designed to provide maximum work in shortest time possible and with minimum of power input! The setting and mounting time is also made to be least!

Aesthetic Appeal

This is not that very important from operational point of view but is of great advantage for the power tools, which are compact in design and attract the eye of the person if they are aesthetic and look beautiful. The handling system and colors of these tools are also very important, for, the use of color-coding is one the rise and all people like to learn what is it and how to make use of it!

Initial cost and operating cost

This is one area where some power and machine tools restrict their market, but they are designed to provide maximum possible benefits to the owner and complete the job well within the budget.

Now we will discuss the maintenance of the power tools that is necessary for their long and eventful life. There are basically two types of maintenance that are adopted in all the industries and are prescribed for all the tools to keep them in good working condition: preventive maintenance and corrective maintenance!

Preventive maintenance

Preventive maintenance is planned and scheduled maintenance of machine and power tools and equipments. The main aim of preventive maintenance is to reduce wear and tear and take timely action before failure condition of the tools and any equipment. This is a very important practice, and the good results that it produces, has enabled it to gain popularity in the recent management and maintenance systems. Almost all the concerned organizations are opting for this type of maintenance, as it saves the downtime and failure condition of the tools to a great extent, which if occurs, causes more problems to the operation.

There are schedules that are prepared according to the working and parts of the tools and the number of days or weeks and months are set to maintain that specific tool.

Daily preventive maintenance operations may include cleaning of the tools, checking adequate lubrication levels and oil flow in sight glasses, checking coolant levels, and perhaps to inform the concerned person about even the minor defects that are detected in the tool.

Weekly preventive checks include checking all lubricant levels, checking coolant, hydraulic pumps and hydraulic oil systems, and pneumatic lines. The schedule actually depends upon the type and working of the tool.

Monthly preventive checks may include checking of spindle drives belts for wear, hydraulic pumps and hydraulic oil systems, and movement of all axes under manual control.

Six monthly and yearly preventive maintenance activities may include checking of alignments and replacement of oils and filters!

We can see that there is wide variety of maintenance activities that can be scheduled and done in the program of preventive maintenance! When I was working in an MNC for my six months training during my mechanical engineering program, I was given the charge of these maintenance activities record, and I worked on a software made specially for these activities, which have to generate the schedule for various maintenance activities, which were initially fed into it by the concerned persons. Once you have to feed the activities and then every month, you can generate the schedule and inform the concerned person about the things that they are supposed to do.

This was a very good software and there was the provision of dates and time , which were to be fed when a particular activity is done. It helps in keeping a proper record of all the planned activities and there is no tension for the personnel to remember all the things or to keep maintenance of reams of papers that have all the planning. However, there were times when someone noticed that a particular activity is not planned and there is no schedule produced by the software, and this was easy as you can enter the activity at any time and there was no limitation in the software on that front!

Now we discuss the second type of maintenance: corrective maintenance.
This type of maintenance activity generally includes replacement of worn parts and to carry out repair works. There is no planned schedule for it, but the accidents and sudden requirements of the maintenance activities fall under this category!

It is obvious that all these things involve a good amount of money and labor cost, but of course at the same time, you can avoid these activities and agree to have frequent breakdowns and downtime in the processes. It is calculated and apparently logical to say that there is greater chance of saving money by undertaking all these activities than by avoiding it and saving the labor cost!

The tool are supposed to produce specified work and job, if the wear and tear of the tool is not above than the specified limit, which is set by the manufacturer to the tools. It is clear that there will be lot of wear and tear on certain parts of the tool, for, they may be revolving and would be coming in regular contact with other surfaces. And to keep this wear well within the limits, it is necessary and by the law of mechanical engineering to provide proper lubrication and coolant. And doing all these things regularly is a part of preventive maintenance: remember that if you are more prone to preventive maintenance and keep regular activities, you are going to have lesser accidents and downtimes and consequently lesser corrective maintenance activities! It is obvious that when you buy a power tool and want to use that tool, you would not like to have breakdowns and failures in the parts of that tool, and to realize that feeling, you need to put some effort from your part: preventive maintenance is that effort from your part--remember it as a good advice from a mechanical engineer!

Most of my life I have unquestioningly believed that the subject of power tools clearly lies in the realm of "guy things." As a little girl, I accompanied my father to the local hardware store, which I enjoyed because there was a pond out back, next to which my dad often let my brother and me play. There was also a row of those penny-candy machines just inside the front door; the kind with Chiclets, Runts and Skittles in them.

Our two-car garage was my dad's domain, with a workbench along one wall and the cabinets above holding all manner of power tools: saws, drills, hammers, electric screwdrivers, and various other manly inventions. Often my dad gave my brother and me some scrap pieces of wood to play with. We were allowed to use all of his tools, with his supervision, and we made all manner of useless objects with our wood.

As I grew, I lost interest in the world of power tools, and didn't give it much thought again until I got married. My new husband had only a small tool collection: anything that would fit into a shoe-boxed size red metal tool box. Of course we lived in a rented home and most repairs were done by the landlord anyway, so power tools weren't a great necessity in our lives.

Several years into our marriage, when we bought our first home, the need for tools became readily apparent. We began driving 40 miles to the nearest major hardware and home improvement store for our purchases and we habited the local mom and pop hardware store for extras. I still thought of such things as a "guy thing" and had little interest in using the tools myself; I was a stay-at-home-mom and my husband a frequent traveler, so repairs and power tool work became a weekend job.

But as the years passed, my husband traveled more and more, the repairs and household needs became more numerous, and before I knew it, I was digging through my husband's newly acquired work bench in our basement and dragging out the drill, the hammers, the screwdrivers, the wire cutters, and countless other items. I was becoming quite the handy-man, or handy-woman, as it were.

This was quite a new experience for me; sort of a mini-exercise in women's liberation. I didn't need to wait for my husband to do much of the handy work around the house. It made me realize that there is a lot of meaning in the term, "power tool." The term, "power" doesn't only refer to the power generated by the tool, but rather, the feeling one gets from using it.

Now my teenaged son is very adept and comfortable with his dad's power tools and those he has already acquired for himself. Shall I wax eloquent on the two facts presented here: the concept that power tools are viewed as a "guy thing" and that they create a sense of power in the user? Maybe some other time.

Lathes are very rare tools for the average craftsmen to use or have experience with in the workshop. This tool is used to make products such as baseball bats and table legs. It's a machine shop tool that can spin wood while other tools are being used on it to form patterns, shapes or just whittle down the wood until it's thin. Just think of the intricate details of your kitchen table's legs. That was made with the help of a lathe.

To use the lathe, you hold the wood with one to three centers, one which will move horizontally as you work up and down the piece of wood. From there, the woodworker will use other tools, such as a cutting tool, and press on a foot pedal that will spin the wood to the speed of his or her desire. While it spins, the tool is used to create patterns in the wood or to just work the wood in a way that can't be done quickly enough for effect by hand. Even if you had another person spin the wood manually, you still couldn't achieve the same effects of the high-powered lathe.

Since the lathe neither divides nor chops at the wood, it is used in many different settings. It can be used, as detailed above with woodworking, but it can also be used in metalworking, too. In this case, metal is strictly removed as the lathe spins, but this has to be done with robots and machines as it's too dangerous for a human to attempt on their own, even if they are an expert at metalworking. During metal spinning, another process that uses the lathe, a piece of metal shaped like a disk is spun to given torque so that it can crush under pressure and form a funnel-like shape.

As you can see, there are many uses for the lathe beyond what is commonly known about it. It can be used on most woods and metals, but the softer the metal, the better off you'll be in getting the results you want for your vision. Lathes can be a lot of fun to use and even more fun to learn how to use properly. Before you indulge yourself, make sure you're ready to devote some time to failed projects before perfection comes out of it.

Everybody's played with a jigsaw puzzle in their life. Each piece is crafted in a different way to put everything together to form a beautiful scene, picture or other portrait. Have you ever wondered how the jigsaw is made? How are the pieces cut? Well, on a large-scale, the jigsaw does the same thing to a thicker substance than what puzzles are made of, a jigsaw makes puzzle pieces out of wood in a way. They make holes in wood in any shapes that the maker wants them to, because it's all custom-designed to their liking.

Jigsaws cut curves. They use stencils to form designs which can be attached to the blade itself which direct how the wood is cut. You can make any type of stencil, if you have the equipment available, which means you can pretty much cut any type of shape with a jigsaw. This is an artistic saw, created by artists, not craftsmen for woodworking mostly. Many shapes you see cut in wood is done by a jigsaw, the only tool out there that can cut the way it cuts.

Most jigsaws are used by hand, but some larger models are power driven through an AC adapter. One reason the jigsaw is made by hand is that it takes patience to cut such stencil shapes and a power saw that keeps buzzing might make a mistake in the wood. It's a delicate process and it requires the hand to guide it, not the motor. However, when you're working with larger wood, or are mass producing such stencils, a larger machinery powered jigsaw is appropriate to use or else you would never have the strength to actually cut the wood into your desired shape.

Artists that use the jigsaw make all sorts of designs, patterns and creations. They take their time and create beautiful works of art. That's the basic purpose behind the jigsaw. It's made for art, and it's made for creating things that can't be made by hand. Jigsaws can add beauty to a bookcase, an entertainment center or to a bed if the time is taken to learn how to use the saw, create designs and exert the energy to turn your furniture in works of art even the Louvre would hang on their walls.

Drills are the oldest power tools right alongside saws. Practically everybody has used a drill in their life or at the very least knows what one looks like if they saw it on the television or in a workshop. A drill is a very basic tool; it uses a drill bit to create holes in the wood. It screws itself into the wood, just like a screw, but it creates a path for a screw to fit in. This is useful for many purposes, such as adding a shelf to another piece of wood of fastening a bookcase to a wall. Boring a hole in the wood, as the process is called, can only be done with a drill. Of course, you can just screw a screw in the wall, but that chance of it actually being successful isn't high.

The drill is used in all sorts of setting, whether it be working with wood or working with metal. Many homes have a drill in it somewhere, because they're used in some cases daily, to screw screws back into something or to fix something that fell off the wall. Most drills come with the function of forward and reverse screwing, which allows you to drill in a screw and then take it out if you need to with the opposite motion. Most also come with drill bits you can use to bore into a wall along with an accessory for a Phillips head or flat head screw, the two most common types of screws. You can buy many different accessories to attach to the drill to use in your home or your work, too, which makes it one versatile multi-purpose drill.

There is no more frequent tool than the drill. It is used so often, more drills are sold per day than any other tool, as it's the most commonly used tool. It's easy to use for men, women and children. Most drills run on a battery or can be plugged into the wall via an AC adapter so you have a longer use of it before you have to charge it up again. Power drills are just one way to join the crowd and learn how to use one of the easiest tools on the market.

Everybody's seen a chainsaw. Many people have used one to cut down trees, clear overgrown gardens and even to cut wood for an extra table leg. The chainsaw has many uses, and it has even brought itself into pop culture infamy by the likes of Eminem carrying one onstage during a song when he tours. It's so popular, even horror movies use it for some of their most powerful horror scenes. The chainsaw is one of the most common types of saws, and it's one of the few that most people have a chance to use during their lifetime whether it be in their own backyard or for work.

The chainsaw has a small gas motor that you fill as you use with standard gasoline you'd buy at a gas station for your car. Smaller chainsaws, however, are now being made with an electric motor you can charge. If you are going to be using the chainsaw for more than one or two hours, it's advised that you invest in the gasoline version as you'll get more use out of it for longer times. Basically, the way the chainsaw works is that there's a chain similar to that on a bicycle with blades called teeth. The teeth rotate around, through the bottom of the chainsaw, due to the motor constantly going and this creates the power to cut through just about anything.

Chainsaws need to be maintained unlike many other garden tools. They need to be lubricated, just like a bike chain, in order to work properly or else the teeth will get stuck together and they won't be able to function properly. Gasoline needs to be emptied after each use to prevent combustion in the event of a spark or fire getting started near it. If the teeth break, you can generally replace them on your own if you know how to do so, otherwise, you would have to take it to a professional to be redone or just purchase a new one.

The chainsaw is a very powerful tool to use in the garden, backyard or for just about anything else you need to cut through in a hurry. Proper safety is required to use it, and not everybody can handle the power it generates. By being careful and learning the basics of how to handle the chainsaw, anybody can wield one without be a danger to those around you.

There are many different types of saw but not all saws are as unique as the band saw. The band saw allows the user to cut both metal and wood, something that most tools can't even conceive of when designed. Typically, someone who wants to cut wood uses one type of blade while someone who wants to cut metal uses another type of blade. Blades are specified to what you are cutting ensuring that you get the maximum sawing ability from the saw in question. If you use the wrong blade, it will snap and break and you will have not only wasted time but also money and energy. This is where the band saw is second to none.

The band saw earned its name from its design. It has a metal band with teeth on it, which makes it vastly different from the flat hand saw people are used to using. They can also cut irregular shapes, like bands, into wood. Curves can be cut, which also can't be done with the conventional saw that most people use in their lifetimes. These saws are for heavy work and hard labor.

There are four primary types of band saws: Large, head, Resaws and double cut. Large band saws are used on lumber. They can't be used for much else, as they truly are some of the largest saws on the market. They are so large they have a cooling down period, usually after four hours, in which they must be turned off and rested because of the amount of heat they produce during usage. Head saws make basic cuts in limber, typically, logs. A head saw has sliver teeth that helps clean out slivers when the saw comes back out of the initial cut. These are incredibly powerful and fast saws, they can cut limber quicker than any other saw. Resaws are smaller versions of the band saw. Double cut saws have cutting teeth on two sides, they are larger, more like a head saw and used for the same purposes.

All band saws are generally used on limber, but they do have other purposes such as cutting titanium and steel in manufacturing plants. You won't see this type of saw cutting your neighbor's lawn shrubs into sculptures, that's for sure.

Crusher is the technical term for a compactor. Much like a trash compactor in your home or apartment, a crusher is a large-scale version of what you use to pack your trash into smaller bits and pieces in order to conserve space. However, when it comes to a crusher, its primary objective is to reduce solid pieces of wood and metal into smaller pieces, not always solid after the process, which reduces the amount of space it takes up and its storage capacity in a warehouse or factory.

Categories of crushers include grinders, jaw and gyratory. Grinding crushers force solid material down into powder for either use or for the garbage. These types of crushers are typically large and have enough force to mash bones to ash. The grinding crusher is used in chemical factories, manufacturing plants and in junk yards as a means of production and destruction of unneeded materials and mess. A jaw crusher is much like a bare trap in many respects to crush material into a triangle-like shape. During this process, the small bits continue to fall down a chute into a rubbish container until the entire package is gone and pretty much disintegrated. Since the power of the jaw crusher is relatively small, it's a long and time-consuming practice and not as widely used as a regular crusher. The gyrating crusher does the same thing the jaw crusher does, except while it moves, it's in a cone shape and the materials filter down through it and out of it into the trash.

There are other types of crushers, like the impact and roller. The impact crusher is used in hammer mills and most have seen these in factories and manufacturing plants. They're the device that smashes down on something while a conveyer belt moves to flatten an object. Roller crushes, on the other hand, flatten solid objects by rolling them around a punch of cylinders.

Crushers are not necessarily for home use on the large-scale, as evidenced by their tasks outlined above, instead they are used in industry for various purposes but mostly to change the shape of a solid object into the one desired. They are not for the inexperienced, and those using them and maintaining them go through a good deal of training before they are ready to use them on their own.

Installing the windows for your home needs careful attention about the weather and climate conditions of your house's environment and how the weather changes around the year. For colder regions, a careful selection of windowpanes is necessary to ensure that proper hear is retained inside the rooms and that there is no loss of heat. This also helps to reduce the cost of refrigeration and air conditioning and other costs to keep the buildings warm.

There are many companies that would offer you a variety of windowpanes and other accessories and multiple features of the paints that are put on these windowpanes, all these factors should be carefully though about before opting for any company. Sometimes you end up spending more than you actually should do and sometimes the efficiency of these planes is not as promised by the company sales persons.

The guidelines for selecting the right windowpanes for your house can include the whole of heat-transfer engineering and can lead to a vast subject of science, but we will here limit ourselves to only general advises that you should take care:

Double-pane windows with low coating on the glass reflect heat back into the room during the winter months. These windows can save a great amount of heat for your rooms.

Exterior or interior storm windows can reduce your heat loss through the windows by 25% to 50%. Storm windows should have weather-stripping at all moveable joints. These storm windows should be made of strong and durable materials for they have to withstand the exposure to severe weather conditions. These storm windows should also have interlocking or overlapping joints.

Installing tight-fitting, insulating window shades on windows is also a good point to save the heat loss. Closing the curtains and shades at night and opening them during the day is also advised.

The direction and exposure of windows in your house should be maximum to the direction of sun, for you need the heat and light of sun greatly and there is nothing in this world that can replace it! Though you can feel warm with the employment of refrigeration and air conditioning, but still sun is the best source of heat and energy and it should be used to maximum potential.

If you are not versed in the art of architecture; it is advised to get the help of some professional, for, the houses are not build everyday!