MOULD AND DIE INDUSTRY 106 / NORTON WINTER PRECISION TECHNOLOGY TOOL GRINDING When choosing your mounted pins, please note that the diameter of the ID grinding tool should be no more than 70 % of your bore. This keeps the contact area between the mounted pin and the workpiece in a comfortable range and avoids burning. When in use, mounted pins are particularly prone to bending stress which can lead to tool failure if a particular threshold value is exceeded. For this reason, the permitted speed nperm of a mounted pin must not be exceeded. It is printed on the packaging label and is often engraved on the shaft of the mounted pin. The permitted speed shown there applies to a minimum clamping length of L3 min = 10 mm. Increasing the clamping length L3 min will result in a new permitted speed. The ratio of increased clamping length and increase of permitted speed is not proportional but requires a recalculation of the new maximum of speed. It is imperative to observe the permitted speed at all costs. If the permitted speed is smaller than the adjustable speed of the mounted pin, a different technical solution is required. If you have further questions, please contact us, we are pleased to help. Many different materials are machined by ID grinding. The bond type of the grinding pin must be chosen according to the material. VITRIFIED BONDS: High resistance to wear and temperature, dressable, especially suited for hardened steels RESIN BONDS: Universally suitable for dry and wet grinding, especially for tungsten carbide and HSS SINTERED METAL BONDS: Extremely wear resistant with stable edge holding; well suited for short-chipping materials such as glass and ceramics ELECTROPLATED METAL BONDS: Single layer, high removal rates, surface roughness depending on grit size and condition of wear, especially suited for roughing tungsten carbide, glass and HSS DIAMOND AND CBN GRINDING TOOLS FOR ID GRINDING DIMENSIONING EXPLANATION SAMPLE DESIGN K1A1W-8-6-2-6-60-4.1-8 D126 K+888RY C100 K Manufacturing process – internal abbreviation Shape 1A1W Cylindrical design D 8 Head diameter T 6 Head length X 2 Layer thickness S 6 Shaft diameter L2 60 Shaft length S1 4.1 Diameter of recess L4 8 Length of recess D126 K+888RY C100 Specification sample of resin bond grinding pin
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