721 Каталог ISCAR 2017 Вращающийся режущий инструмент и инструментальная оснастка Стр.717

Каталог ISCAR 2017 Ротационный инструмент Стр. 717 0721 ENG Lab2u

USER GUIDE Tap Surface Treatments and Coating Types The high speed steels we use grant high wear resistance and toughness. For machining certain materials, various surface treatments are an advantage. Steam Tempered (ST) The steam tempered is a Fe3O4 oxide coating which reduces the friction between the tool and workpiece and prevents cold welding. Nitriding (NI) Recommended surface treatment for machining hard wear/abrasive materials such as grey cast iron, aluminum alloys with high silicon percentage (more than 10%). TiN Coating (TI) The TiN coating has a hardness of approximately 2,300 HV and is temperature resistant up to approximately 600°C. This is an excellent golden colored coating for general applications. TiCN-COATING - TiCN TiCN takes place of TiN when the conditions require the coating to have a different hardness and toughness. The TiCN brings an advantage to machining very difficult steels or cutting interrupted bores. The TiCN-coating has a hardness of approx. 3,000 HV, but is temperature-resistant up to approx. 400° only. That means TiCN needs excellent cooling for long service life. Color: Blue-grey coefficient of friction against steel : 0.4 TiAIN-COATING - TiAIN This is a special coating for machining abrasive materials such as: grey cast iron, alu-alloys with silicon, fiber reinforced plastics, etc., or machining under high temperatures, which means with insufficient cooling, or high speeds > 600m/min. The TiAIN has a hardness of approx. 3,000 HV and is temperature resistant up to approx. 800°. Color: Violet-grey coefficient of friction against steel : 0.4 Hardslick-COATING - Hardslick Hardslick combines in a novel way the advantages of an extremely hard, thermally stable TiAIN-coating with the sliding and lubricating properties of an outer WC/C (Tungsten carbide/carbon) coating. The hardslick coating has a hardness of approx. 3,000 HV and is temperature-resistant up to approx. 800°. Color: Violet-grey coefficient of friction against steel : 0.2 Tolerances According to DIN EN 22857 For taps with ISO metric threads. The following chart gives a comparison between the new standard DIN EN 22857 and the withdrawn standard DIN 802 part 1. An important change is the re-classification from tap tolerance to tap application class. Application class for taps to DIN EN 22857 Tolerance class to withdrawn standard DIN 802 part 1 Allotment of the tolerance zones of the nut thread to be cut Class 1 ISO 1 4H 4H 5H - Class 2 ISO 2 6H 5G 5G 6H Class 3 ISO 3 6G 6G 7H 8H 7G - 7G 8G A suitable transition period is to be expected. Codes for tolerance classes 7G/8G and tolerance zones have yet to be standardized within DIN EN 22857, and the values from DIN 802 part will remain valid. 717 TAPS