Class P of cutting taps

【英】困ったときの知恵袋詳細

Cutting Taps Metric Threads Standard (Screw Threads, Center Holes)

I thought that the tolerance class of a YAMAWA PO M4X 0.7 P3 was 20 μm larger than a standard class for a P2 tap. When each tap increases by one P class number, does it always mean each tap becomes larger by 20 μm than the previous P class number?

Not all tap sizes are 20 μm larger in diameter for each P class number increase or decrease.
There are three types of P class sizes for taps depending on the nominal diameter and the pitch diameter. An A type tap increases in diameter by 15 μm, a B type increases in diameter by 20 μm and a C type increases in diameter 40 μm for each increase in P class number. For details, please see the explanation below.

Document

【全:英】FIXメニュー

ページトップへ