Обший каталог Yamawa 2016 - 2017 - страница 308

Pipe Tap Overall
length
Thread
length
Shank
dia.
Size of
square
Length of
square

L ℓ Ds K ℓk
Spiral Pointed Taps Spiral Fluted Taps Spiral Fluted Taps
(for blind hole)


ZELX MOLD NPT
Hand Taps for Hard-to-Machine Materials For American Taper Pipe Threads
Specification
(for through hole)


■Suitable for hard steels of 35 ～ 45HRC, such as forgings
and thermal refined steels of high carbon steels and alloy
steels, and die steels.

Recommended Tapping Speed depending on Materials
(for through hole)


Thermal re ned steels Tool steels
〜
5 〜
5
35～45HRC
For icon explanation, refer to P.50
Hand Taps


TYPE：１ TYPE：２
Cemented
Carbide Taps


Segment：1H
Roll Taps


L ℓ Projection Ds K ℓk No. of
Size Class Code Chamfer Type
(inch) (inch) (inch) (inch) (inch) (inch) flutes
For American Pipe Threads
NPT 1/8-27 ANSI G Y89641 3P 2.125 0.75 0.312 0.437 0.328 0.375 4 1
NPT 1/4-18 ANSI G Y89643 3P 2.437 1.062 0.459 0.562 0.421 0.437 4 1
Pipe Taps Simple Inspection Tools


NPT 3/8-18 ANSI G Y89644 3P 2.562 1.062 0.454 0.7 0.531 0.5 4 1
NPT 1/2-14 ANSI G Y89645 3P 3.125 1.375 0.579 0.687 0.515 0.625 4 2
NPT 3/4-14 ANSI G Y89646 3P 3.25 1.375 0.565 0.906 0.679 0.687 5 2
Thread Mills
Dies
Center Drills
Centering Tools


ANSI
Pipe-3
304