Cutter blade characteristics such as material, design, and thickness can have a large effect on cut quality.

Blade materials

Blue tempered spring steel is most commonly used because of its cost and availability over a wide range of thicknesses (0.010-0.062 inch). It is a very tough material with an HRC value of approximately 48-51 and fair wear characteristics.

Razor blade stainless steel is becoming very popular due to its HRC value of 57-58, which leads to improved wear resis- tance. This material retains good toughness, but will chip or break. It is available in 0.010-0.062 inch thicknesses. Because it is non-corrosive, stainless steel is a good choice for medical cutting applications, and may even be coated with Teflon to enhance cut quality.

A-2is a good grade of tool steel with an HRC of 60. Its mini- mum thickness (0.031 inch) forces the blade manufacturer to grind it down for thinner applications, which adds cost. A-2 is more wear resistant than stainless, but is also more brittle.

M-2is an excellent grade of tool steel with an HRC of 63-66. It is one of the best materials for coating with titanium nitride for improved wear resistance. (However, coatings generally cause some slight loss of sharpness.) 0.025 inch material is available, which covers many applications without the need for secondary grinding operations.

D-2is another excellent tool steel with an HRC range of 58-

60.It is tougher than M-2 but has slightly less wear resistance. Its minimum thickness (0.035 inch) and the need for special- ized grinding materials, make it a relatively expensive materi- al. It is the material of choice for cutting Kevlar-reinforced hose.

CPM 10-Vis a form of carbide developed especially for the high speed punch industry. With an HRC of 60-62 and a toughness that far exceeds D-2, it is by far the best cutting blade material. Because its minimum thickness is 0.035 inch, and it requires the use of diamond grinding wheels, CPM 10- V is the most expensive of the blade materials.

CUTTER BLADE

SELECTION

AND USE

UGE059/1003 CUTTER BLADE SELECTION AND USE

APPENDIX B-1

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Conair SC-5 manual Cutter Blade Selection USE, Blade materials
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SC-5 specifications

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