Cutting Power Tools are many steps up the evolutionary ladder as compared to cutting with an axe or knife. We as human beings have arrived at a point where we make objects for us so that physical strength becomes less and less important. Even though most jobs that require cutting tools also require strength, there is no denying that workmen everywhere have found great relief in using these power tools.

There is a variety of cutting power tools available for different tasks. How do you choose the right tool for the right job? This Power Tool Series will cover the type of power tools and the materials they are suited for. This article covers power shears, their maintenance and safety tips.

Power shears resemble large, high-tech scissors. Instead of a human hand exerting force on a scissor to cut an item, power shears use electrical power to apply a lot more force to the object. Power shears can be used to cut materials such as steel, shrubbery and concrete. Manufacturers of power shears include Pacific International, Milwaukee, Malco and Fiskars.

Maintenance
Keep the equipment clean. Do not sharpen the blades as sharpening may damage this cutting power tool. The tool must be greased every 100 hours of operation. Also, if they are being used to cut shrubbery, care must be taken not to let the shears touch the wires that are often used to keep shrubbery in place. The shears use a mixture of gas and oil, with the oil being the lubricator. Refueling should take place on concrete so as not to kill any grass or plants.

Safety tips for Using Power Shears
As with all cutting power tools, care must be taken to protect the user harm. If necessary, wear protective goggles, hard hats and leather gloves. Do not use power tools out where they can be tripped over or accidentally started. Obviously, if someone has small children, any type of cutting power tool should be kept out of reach.

In summary, power shears can be used to cut shrubbery, concrete and even steel! Not sure of which power shears to use, check out these reviews

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Now I'm going to tell you about yet another Home Hitachi Tool now home or business should not be without it's the Hitachi Reciprocating Saw, it has an 11 AMP motor with variable speeds for intense rigorous cutting jobs. The Electronic Variable Speed can be changed by either trigger and/or hand dial, which makes it very convenient for balanced control and speed. The trigger is also over-sized for improved manageability. Its' lightweight (8.8 lbs) makes it easy to maneuver for over-head jobs such as tree trimming, which I've done and just about everything else from cutting Styrofoam, metal, sod (believe it or not-if you have to do some landscaping or just cutting out a bad patch in your yard it works great).

The Hitachi Reciprocating Saw's blade changing system is so quick and easy requiring no tools and only one hand. The blade is also reversible, mountable up or down for varied cutting methods. The ergonomically angled D-shaped, non-slip grip maximizes comfort and control. The 1-3/4" Keyless adjustable pivot foot regulates depth of cut with a stoke length of 1-1/4" at 0-2800 spm for rapid cutting performance.

The Hitachi Reciprocating Saw is dust and water resistant, its' triple-sealed construction protects and increases tool life and performance. The Hitachi Reciprocating Saw comes with a set of All Purpose Progressive Blades, and a Heavy-Duty Carrying Case and Hitachi's 5-year limited Warranty.

This all purpose Home Hitachi Tool is a must and every Handyman and Professional should have one of these tools in his tool box.

I'm Leroy Leff and you can see more Home Hitachi Tools at my site: http://www.home-Hitachi-tools.blogspot.com.

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Ultra hard materials are the result of modern research and development. The last century witnessed extra ordinary growth in many fields of science and technology including material science. The latest developments in science and technology resulted in the use of very hard materials in mechanical, automobile and aviation fields.

This in turn resulted in the development of new ultra hard cutting materials to machine these parts. Beside carbide cutting tools several other ultra hard materials like ceramic, polycrystalline diamond (PCD), monocrystalline diamond (MCD-natural diamond), diamond coatings on cutting tools, synthetic monocrystalline diamonds as well as polycrystalline cubic boron nitrite are developed.

Polycrystalline Diamond (PCD) Polycrystalline diamond plates are manufactured by high temperature and high pressure process where the diamond coating is directly combined with a carbide support. Polycrystalline diamond is made by sintering of high quality diamond powder with metallic binder.

Depending upon the application polycrystalline diamond materials are available in various grain sizes. For example the diamond with rough grain sizes are used for making cutting tools with excellent wear resistance due to its ability to retain cutting edge for a longer period. Incase you need very high surface finish on machines parts, then ultra micro grain sizes are highly preferred.

Medium grain sizes are used for general all purpose cutting tools since it is a balance between high wear resistance of rough grain size and superior finish of ultra micro grains. This makes the medium grain sized polycrystalline diamond as an excellent ultra hard material for manufacturing high quality metal cutting tools.

Natural Diamonds Mono crystalline diamond (MKD) is natural diamond out of pure carbon. These natural diamonds enable the production of geometric defined flutes with absolutely notch free flutes. Natural diamond (MKD) is on of the ultra hard materials which is suitable for achieving very high surface finishes for mirror bright surfaces, machining of non-ferrous materials, micro machining and machining of titanium without burr.

Synthetic Monocrystalline Diamond Further research and development resulted in synthetic mono crystalline diamonds which are available in triangles and rectangles with an edge length of approximately 8mm. The natural diamonds often contains nitrogen and the it could have varying hardness and thermal conductivity.

Whereas the synthetic monocrystalline diamonds have uniform structure with constant thermal conductivity and less internal stress. Today synthetic monocrystalline diamonds are being produced in various shapes and sizes which offers great application possibilities of this ultra hard material in future.

Researches have found considerable improvements in synthetic monocrystalline tool life, improved surface finish and constant wear behavior compared to other ultra hard materials like PCD and natural diamond.

Diamond Film Coating (CVD Process) Diamond film coatings are done to improve the surface hardness of cutting tools. Generally diamond film coatings can be classified into two. The thin diamond film coating with a layer thickness of approximately 5-20 microns and thick diamond film coating with a layer thickness of approximately 0.5mm. Higher thermal and chemical stability and ultra surface hardness are the advantages of diamond film coating.

Low fracture toughness is the disadvantage of of diamond film coatings. And compared to polycrystalline diamonds no binder is used while producing diamond film coatings which causes higher splintery fracture. Diamond film coated ultra hard materials are best suitable for machining of aluminium alloys with high silicium contents as well as graphite and carbon. Tests show very good use of diamond coated tools in machining plastics, gold alloys and wood machining.

Polycrystalline Cubic Born Nitrite (CBN) Polycrystalline Cubic Born Nitrite is the hardest cutting material after ultra hard materials like ceramics and diamond. CNB is manufactured by a sinter process of high temperature and pressure using selected particles of Cubic Born Nitrite.

Depending on various cutting applications polycrystalline cubic born nitrite are available with with different binder phases as well as in fine, medium and rough grain structure. CNB is an ultra hard material with excellent thermal stability up to 1200°. Polycrystalline Cubic Born Nitrite with low cbn contents is mainly used in precision machining of hardened steel and other hard ferrous materials.

About the Author

Neo is a qualified tooling engineer with more than 10 years experience in the field of tooling. You can find more information on tooling in his metal stamping website which also provides detailed information on cutting tools and machines.

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