Cutters

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Cutters are cutting hand tools that are used to cut different kinds of materials in different shapes and sizes. Depending on the material and the object to be cut, there are different types of cutters. Each cutter is used to execute a different kind of function and each cutter is designed in such a so that it makes clean cuts with little effort.


Types of Cutters

• Circle cutter: Circle cutters cut circular holes in sheets of metal, wood, plastic, hardboard, brass, copper, mild steel, aluminum or composition materials. The cutter features a regular center drill with a cutting tool mounted on an adjustable bar. Diameter of the circle is regulated by a setscrew adjustment on the cutting bar. Downward pressure is applied as the regular bit pulls into the material and forces the cutting tool down in a slowly lowering circle. Ground, hardened cutting tools assure clean, even cutting in a variety of materials. Cutting edges available on hole cutters include high-speed steel bi-metal, carbide grit and diamond grit. Each cutting edge is designed to work best on specific materials. Bi-metal for metal, wood, plastic, etc.; carbide for tile, brick, fiberglass and hard composites; diamond for glass, ceramics and other abrasive materials. Due to the unbalanced load inherent in the design of these tools, for safety's sake, they must be used only in drill presses or drill stands and never with a handheld drill.
  
  
• Pipe cutter: Pipe cutters make a faster, cleaner cut. An ordinary hacksaw is often used to cut pipe, even though it is almost impossible to make a clean, straight cut. Most cutters have a single cutting wheel and two rollers, which make smooth right-angle cuts. Such cutters are used to cut pipe 1/8" to 6" in diameter. Cutters are sized for pipe 1/8" to 2", 1" to 3", 2" to 4" or 4" to 6" in diameter. Major points of wear are rollers, wheels and pins on which they are mounted. When cutter wheels are worn out, they should be replaced.
  
  
• Tube cutter: Pipe and tubing cutters are basically used as plumbing tools. For cutting brass, copper, aluminum or thin-wall conduit tubing, tubing cutters are recommended. Tubing cutters are almost similar to pipe cutters. They have cutter wheels and rollers. Some have a triangular blade-type reamer that folds out of the way when not in use. Tubing cutters for plastic and separate cutting wheels for plastic are available. Tubing cutters are sized to cut material with outside diameters ranging from 1/8" through 4-1/2".
  
  
• Wire cutter: A wire cutter is a tool that is used to make clean cuts in wires by using pressure. Most wire cutters are hand-held tools like the pliers. In fact, there are many pliers like needle-nose pliers and wire strippers which have some form of wire cutting feature. Wire cutters are also available in large pneumatic formed tools used for heavier wires such as power lines.
  
  
• Glass cutter Glass cutter are the specially designed cutters meant for cutting glass of all types.

Features of cutters
Some cutters are made with a spring in the handle to open them automatically after each cut, providing ease and comfort for the user. Most cutters have PVC handle grips for comfort.

• Side Cutters have a cutting blade on one side only and are available in long, curved and short-nose types.
• End Cutters have cutting blades on the end and are used to make sharp, clean cuts close to the surface on wires, bolts and rivets.
• Diagonal Cutters have two cutting blades set diagonally to the joint and/or handles. Shears have cutting edges that pass each other.

Uses of cutters
Cutters are very handy hand tools used to cut various ferrous materials such as:

• Rod wire rope
• Steel wire and cable
• Guy strand
• Aircraft cable
• Fencing
• Bolts and steel strapping.

There are cutters which can cut non-ferrous material like copper and aluminum. Cutters are widely used in:

• Construction
• Plant maintenance
• Electrical construction and maintenance, and
• Other operations.

It is always advisable to use the right cutter for the job.

Proper Care
Cutters should be adjusted properly and always lubricated. Jaws of the cutters can be sharpened by following instructions given with the manual. When the cutter blade becomes too blunt, or when the cutters crack or broke or show signs of looseness, it is better to discard then. Repairing cutters or replacing cutters are not recommended.