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Acme Thread Form




The Acme thread was developed to avoid the problems with the Square Thread Form . In a square thread the cross section reveals a zero degree pitch, and is difficult to thread. To offer better characteristics, the Acme thread was developed.

The Acme thread form form uses a 29 degree pitch with flat apex and valley. The Acme Screw Thread is stronger than V-profile 60 degree threads. Wear can be compensated for with a "split nut". Typically found where large loads or accuracy is required as in Vises or the lead screw of a Lathe .


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