Общий каталог Yamawa 2021 - страница 635

1. Terminology of Taps

SP Flute Width of land Chamfer angle

SL

Core diameter

PO

ST

Chamfer relief

ROLL

CARBIDE

LONG

External center Internal center

Chamfer length (THCHT)

Usable length (LU)

Thread length (THL)

Chamfer relief

Indicator drop for Chamfer relief

Neck diameter (DN) Shank diameter (DCON)

Shank length (LS)

Functional length (LF)

Threads relief and cutting angle

Heel

Size of square (K -DRVS)

Length of square (LK)

Width of margin

Thread relief

Indicator drop for Chamfer relief

Cutting face Cutting angle

HAND

TAPS Edge angle, including chamfer relief, thread relief, cutting angle and others, as well as heat treatment, have important functions aff ecting workpiece shape, tool life, surface fi nish of internal screw thread, and so on.

EG (STI) Chamfer of straight fluted taps

DIN Hand Set Series

V(5P) M(3.5P) F(2P)

F SPECIAL M THREADS,

GAUGES V

THREAD Serial taps come in sets of three (DIN352, DIN351) or two (DIN2181, DIN5157) to complete screw threads by cutting work materials in MILLS incremental steps. The fi rst tap (V) and the second tap (M) cut screw threads under size. Then, the third tap (F) completes the screw threads.

tap Plug tap Taper tap Bottoming tap threads

CENTER

DRILLS

Technical 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.