1) the rake angle γ0 of: stainless steel the hardness, strength is not high, are better but the ductility, toughness, high thermal strength, the cutting chips can not be easily cut off. Premise tool have sufficient strength, should be used in a large rake angle, so that not only can reduce the plastic deformation of the metal cutting, but also can reduce the cutting forces and temperatures, while the depth of the hardened layer is reduced.

The rake angle of the turning of various stainless steel is substantially 12 ° ~ 30 °. Of martensitic stainless steel (2Cr13), rake angle desirable value; austenitic and austenitic + ferritic stainless steel, the anterior horn whichever is smaller; processing without quenched and tempered or quenched and tempered hardness lower stainless steel, desirable larger anterior horn; smaller diameter or thin-walled workpieces, should adopt a large rake angle.

High-speed steel cutters take γn = 10 ° to 20 ° the carbide cutters take γn = 5 ° to 10 °; the reamer and generally γ0 = 8 ° to 12 °; Taps generally take γ0 = 15 ° to 20 ° ( machine) or γ0 = 20 ° (hand).cutting wheel

2) after the angle α0: increase the angle can reduce the flank and the machined surface friction, but will make the cutting edge of strength and reduce the cooling capacity. The posterior horn reasonable value depends on the thickness of cutting, cutting thickness hour, should choose a larger rear corner.cutting disc

Stainless steel turning or boring tool usually take α0 = 10 ° ~ 20 ° (finishing) or α0 = 6 ° ~ 10 ° (roughing); α0 = 10 ° to 20 ° of high-speed steel end mills, end mills take α0 = 15 ° ~ 20 °; hardness alloy end mill take α0 = 5 ° ~ 10 °, the mills take α0 = 12 ° to 16 °; reamer and tap to take α0 = 8 ° to 12 °.

3) the master the declination the kr, vice declination k'r, and the re: reducing the main declination can increase the length of the blade work, is conducive to heat, but in the cutting process, to increased radial force, prone to vibration, often take kr = 45 ° ~ 75 °, rigidity, may be appropriate to increase. Vice declination often take k'r = 8 ° ~ 15 °. In order to strengthen the tool tip, should generally be milled e = 0.5 to 1.0 mm tip arc.

Steel bonded carbide drill bit processing copper-nickel alloy, has a large advantage in cutting efficiency and tool life, but because of its strength is lower than the high-speed steel cutting tools, such as the use of a standard type of twist drill structure, can not be normal processing.
K value of 2.1 increases the thickness of the core drilling

National standards, coring per 100mm thickness K value increased 1.4 ~ 2.0mm, now changed to 100mm increases from 2.2 to 2.8 mm. Increase the thickness of the core drilling can increase the stiffness of drill cutting part.cutting wheel

2.2 reduce the helix angle β

National standards? 15mm twist drill helix angle b = 30 °, β = 25 ° now changed. Reduce the helix angle is conducive to sticky and hard chips discharged smoothly.

2.3 main cutting edge additional points of flute

Three crescent-shaped cross-out on the main cutting edge in two symmetrical 180 ° flute, to reduce axial cutting forces, and to create favorable conditions for chip removal.

2.4 to reduce the the edge bandwidth degrees f

National standards? 15mm twist drill blade width f = 1.0mm f = 0.75 mm, current decrease. Reducing the blade width can reduce the friction of the edge with the hole wall,grinding wheel  and reduce tool wear.

2.5 grinding chisel edge

Drilling the size of the axial force with the lateral edge of the size is closely related to reduce the cutting resistance, the chisel blade width was changed to 0.7 ~ 1.0mm (about 1/3 of the width of the chisel edge, the original).