Общий каталог Yamawa 2021 - страница 637

3. Flutes

Major functions of flutes are

SP 1) Chips’ pocket, 2) lubricant supply route, 3) rake angle formation, 4) to determine cutting amount in relation to the number of chamfer threads. All are very important. Taps’ fl utes are classifi ed into following groups by tapping methods, fl uting method, tapping direction, and hand of screw thread.

SL Straight Straight fluted tap for

blind and through hole

PO Spiral Cutting type ST Left Hand Spiral

Spiral point Spiral pointed tap Flutes of tap for through hole

ROLL

CARBIDE with oil groove Roll tap for blind

and through hole Forming type

without oil groove Roll tap for blind LONG and through hole

HAND Type of Flute

TAPS

Type of tap Type of tap Cutting type Forming type Flute Flute

EG (STI)

Straight Flute With oil groove

SPECIAL

THREADS,

GAUGES

Spiral Flute

THREAD

MILLS Spiral Point Without

Flute oil groove

DIES

CENTER

In general, the number of fl utes for cutting taps usually increases as the diameter becomes larger. However, it is also infl uenced by tap’s DRILLS strength and rigidity, the accomodation of chip, the amount of cutting, and lubricant supply system.