Общий каталог Yamawa 2021 - страница 700

18. Selecting different tap holder combinations by machine feed system

Characteristics of tap self-guiding behavior

Holders aspects

SP

r=tap’s radius, s=thread relief, t=margin width

Eccentric thread relief (no width of margin) SL

Compression Tension Axial Floating s=thread relief

Spring direction PO

Completely rigid holder type Tap characteristics; high cutting performance and machining performance, with little to no self-guiding The tap is held with no axial or radial features. Operation; A fully synchronous machining adjustment in the collet and holder. system with fixed rigid holder is needed. Example: "High speed tapping" and "fully synchronous tapping."

Con-eccentric thread relief (margin and thread relief)

t=margin width s=thread relief

Adjustable spring floating holder (Tension & Compression) Tap; High level of self-guidance due to suitable tap diameter margin and thread relief. The combination of nice portion of margin and chamfer relief helps to make appropriate tap Machine feed and tap's thread lead errors are corrected by two types of spring system in the holder, the axial tension direction of the tap and the Concentric (No relief) axial compression direction of the tap.

r=tap’s radius

ST

ROLL

CARBIDE

LONG

HAND

TAPS

EG (STI)

SPECIAL

THREADS,

GAUGES

THREAD

MILLS

DIES

CENTER

Tap; A full thread land stays in contact with the thread DRILLS major diameter at all times. Tap has no thread relief on major diameter, creating a high level of self-guidance even with unbalanced feeding conditions.