显示81-88的 88 结果
New Roll Tap (NRT) and High Roll Tap (HRT) are both forming tap
While HRT is a rolled-finish tap with basic performance and is limited to sizes of M6 or less, NRT is a grinding-finished tap with a wide variety of tool base material , various coatings, application-specific specifications, and small diamet
The "P" and "B" notations on the forming tap shank represent chamfer length .
In the New Roll Tap (NRT), P (=Plug) is for through hole machining and chamfer length 4P, and B (=Bottoming) is for blind hole machining and is chamfer length 2P.
In forming tap processing, burrs form on the hole entrance , resulting in a raised shape.
In order to suppress the burr of the hole entrance , it is effective to perform a chamfer of 60~70° (full-width) in advance on the pilot hole of the forming tap .
PT threaded pilot hole diameter
Straight holes are recommended for pilot holes.
If you want to increase the pilot hole diameter when tapping PT screws than the catalog value, consider that the allowable range is up to +0.3 mm from the catalog recommended value for nomi
What is the processing depth of tapered taps for pipes?
The number of reference diameter positions in the catalog is a guide to the machining depth.
Example: Processing depth of tapered taps for pipes PT3/8
Tapered tap TPT for pipes (long thread type) The machining depth for machining PT3/8 threads is 21 mm.
Tapered Taps for Pipes S-TPT
A interrupted -shaped tap is a type of tap for tapered threads, in which the peak of the complete tap thread is removed so that it jumps into a single peak.
Tapered taps for pipes perform thin cutting even in fully threaded parts.
By reducing the number of threads in the thinly cut part, the interrupted typ
NPTF has shallow valleys and sharp mountains.
They crush each other and fit together, resulting in screws that do not require a sealing material.
Therefore, the NPT and NPTF cannot share tools.
