Обший каталог Yamawa 2016 - 2017 - страница 776

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Terminology of Taps Description of products Flute Width of land Chamfer angle External center Core dia. Internal center Shank dia. Size of square Chamfer length Thread length Shank length Length of square Overall length ■Chamfer relief ■Thread relief and cutting angle Width of margin Chamfer relief Thread relief Heel Indicator drop for thread relief Indicator drop for chamfer relief Cutting face Cutting angle Edge angle, including chamfer relief, thread relief, cutting angle and others, as well as heat treatment, have important functions affecting workpiece shape, tool life, surface finish of internal screw thread, and so on. ■Chamfer of hand tap Serial taps F V(5P) M(3.5P) F(2P) M V Serial taps come in sets of three or two to complete screw threads by cutting work materials in incremental steps. The first tap (V) and the second tap (M) cut screw threads under size. Then, the third tap (F) completes the screw threads. Hand taps Taper tap threads Plug tap threads Bottoming Bottoming tap threads tap Plug tap Taper tap Technical Information In general, tap chamfer is the most important part of taps to create internal thread. The function of full thread part of taps is to make a guidance. Technical-1 772