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Checking Pitch diameter

Anyone know how to check an external (due to old rule number 3) thread for pitch also so i can use it as a Datum ? Any simple step-by step direction would be awesome!!!
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  • Anyone know how to check an external (due to old rule number 3) thread for pitch also so i can use it as a Datum ? Any simple step-by step direction would be awesome!!!


    You can buy a datum simulator, they are like ground sleeves that fit over the thread with a plane diameter on the outside. That is as close as you can get to actually picking the pitch diameter up as a datum feature. They are also available for inside threaded holes and used to check the position of them.
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  • Anyone know how to check an external (due to old rule number 3) thread for pitch also so i can use it as a Datum ? Any simple step-by step direction would be awesome!!!


    You can buy a datum simulator, they are like ground sleeves that fit over the thread with a plane diameter on the outside. That is as close as you can get to actually picking the pitch diameter up as a datum feature. They are also available for inside threaded holes and used to check the position of them.
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