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4 inch tapping GZGZNPT1/81/43/81/23/41 for pipe thread tap

price:USD$263.00
discount 70% in 2018-09-25 to 2018-09-27
price: USD$ 184.10
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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National parcel postXinjiang, Tibet, Qinghai, Gansu and other remote areas, as well as Hong Kong, Macao and Taiwan excepted

This product is not suitable for machine use, generally used for hand processing water pipe galvanized pipe, iron parts, aluminum parts, PVC pipe

1/81/4 uses M6-14 tap wrench, 3/8 uses M8-18 or M12-24 tap wrench, 1/2 uses M12-24 tap wrench, 3/41 inch using M27-40 tap wrench, tap wrench link is as follows:

This tap is pipe thread machine tap, is a one, rather than one to one pay, not separately attack, two attack.

There are three kinds of commonly used machine taps for pipe thread: GZGZ
G: British cylinder pipe thread, tooth shape angle 55 degrees.
ZG: taper pipe thread, tooth type angle is 55 degrees, the new code named RC R (G and ZG tap die diameter, pitch the same, difference is G is a cylindrical tube, no thread taper, ZG is a conical tube, a taper thread).
Z: American taper pipe thread, tooth type angle is 60 degrees, the new code named NPT (outer diameter, pitch with the above two inch are different, some books also put this thread called ZG60 DEG pipe thread)

The 1/8 diameter of British pipe thread is 9.728mm, the machining distance of cylindrical pipe thread is 8.7mm, and the pitch 28 is converted to metric system 0.907mm

The 1/4 diameter of British pipe thread is 13.157mm, the machining distance of cylindrical pipe thread is 11.7mm, and the pitch 19 is converted to metric system 1.337mm

The 3/8 diameter of British pipe thread is 16.662mm, the machining distance of cylindrical pipe thread is 15.2mm (instead of 15.2mm bit can be replaced by 15mm), and the pitch 19 is converted into metric system 1.337mm

The 1/2 diameter of British pipe thread is 20.955mm, the machining distance of cylindrical pipe thread is 19mm, and the pitch 14 is converted to metric system 1.814mm

The 3/4 diameter of British pipe thread is 26.441mm, the machining distance of cylindrical pipe thread is 24.5mm, and the pitch 14 is converted to metric system 1.814mm

Inch pipe thread 1 inch outer diameter is 33.249mm, cylindrical pipe thread processing hole distance is 30.6mm, pitch 11 converted into metric system is 2.309mm

ASME 1/8 pipe thread diameter 10.272mm, pitch 27 converted to metric for 0.941mm

ASME 1/4 pipe thread diameter 13.615mm, pitch 18 converted to metric for 1.441mm

ASME 3/8 pipe thread diameter 17.055mm, pitch 18 converted to metric for 1.441mm

ASME 1/2 pipe thread diameter 21.223mm, pitch 14 converted to metric for 1.814mm

ASME 3/4 pipe thread diameter 26.568mm, pitch 14 converted to metric for 1.814mm

Us 1 inch diameter pipe thread 33.228mm, pitch 11.5 converted to metric for 2.209mm