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thread depth measurment
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Posted by: mack1

06/20/2009, 10:18:40

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As our customers continue to tighten tolerances on thread depths, the debate as to the proper method of thread depth measurement seems to resurrect itself. Please if you can, point us in the right direction.
Method #1
Screw the thread gage into the hole until it bottoms out. Back out or unscrew the gage while counting the number of turns. Number of turns times thread pitch equals depth. Chamfer size/depth on hole must be considered.
Method #2
Measure the overall length of the thread gage. Screw the thread gage into the hole until it bottoms out. Measure from the distance from furthest point on the thread gage (where first measurement was taken) and subtract this measurement from the overall length of the gage. This gives you a length.
We are trying to determine which is the proper method or perhaps some other method without having to buy additional equipment.
Thanks for your help.







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: thread depth measurment
: thread depth measurment -- mack1 Post Reply Top of thread Engineering Forum
Posted by: Kelly Bramble

06/20/2009, 17:14:04

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Both methods sound good to me. I assume that your customer has specified the thread depth in terms of thread engagement depth?







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