Общий каталог Yamawa 2021 - страница 637

3. Flutes
Intro
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’ flutes are classified into following groups by tapping methods, fluting method, tapping direction, and
hand of screw thread.

SL Straight Straight fluted tap for
blind and through hole


Spiral
PO
Cutting type

Left Hand Spiral
ST
Spiral point Spiral pointed tap
Flutes of tap for through hole
ROLL

with oil groove Roll tap for blind
CARBIDE and through hole
Forming type

without oil groove Roll tap for blind
and through hole
LONG

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 flutes for cutting taps usually increases as the diameter becomes larger. However, it is also influenced by tap’s
DRILLS strength and rigidity, the accomodation of chip, the amount of cutting, and lubricant supply system.

Technical
info

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