ACME Thread
ACME Thread
(OP)
Hi,
Wish to know what thread designation of 1-3/4"ACME-2G means. 2G must be the tolerance of male thread, but what exactly is the tolerance and what is the designation for female thread? Any idea is appreciated.
Happy new year!
Wish to know what thread designation of 1-3/4"ACME-2G means. 2G must be the tolerance of male thread, but what exactly is the tolerance and what is the designation for female thread? Any idea is appreciated.
Happy new year!





RE: ACME Thread
RE: ACME Thread
Steven Fahey, CET
"Simplicate, and add more lightness" - Bill Stout
RE: ACME Thread
RE: ACME Thread
Bill
RE: ACME Thread
Yes, the 2G is applied to the joint, but is specified as "2A" for the pin or screw, "2B" for the box or nut. You would call out 1.750-6 ACME-2A for a 6 tpi pin and 1.750-6 ACME-2B for the corresponding box.
The tolerance as well as thread allowance is governed by the classification of thread. As mentioned, Machinist Handbook is a very good place to start.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: ACME Thread