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The limit gauge measures the fit, not the length correctly.
Since there is a chamfer and an incomplete pile at the tip of the thread, it is not possible to make an accurate judgment.
For example, the imperfection of both end faces of a parallel screw gauge depends on the size and pitch, but is not less than 3/4 turn and no more than 1 turn.
Tapered pipe screws have different dimensions depending on the type of thread.
| I want to check the effective thread length. |
| Q: I want to check the effective thread length with an M10×1.5 gauge. If the GO is screwed 6 times, it is 6 pitches (6×1.5 = 9), so does it mean that the effective thread length of 9 mm is secured? |
| A: It is not possible to make an accurate judgment. Since the incomplete threading of about 1 turn is performed, the distance of the first complete thread from the gauge end face is about 1/2 pitch. The standard product does not directly control this distance, but is only a guide. |
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| A: GO B: Effective thread length 9mm |
Special products can be used for gauges with scales and notches for inspecting effective thread lengths.