That is correct, roll-formed threads. The initial run of screws we outsourced were machine cut, however the threads were rough and matched poorly to the mating threads. Our supplier offered the alternative of roll-forming to produce a smoother fit-up.
Other than the cracks on the run-out...
We recently outsourced an acme screw with the following specs:
Stainless 303S per ASTM A582
THD.-1-5 NA-2G
Major Dia.- 1.000
Pitch Dia.- .8920
Minor Dia.- .7800
Single left/right hand ACME Thread
Pitch - .200
Thread Thickness at Pitch Line - .100
Thread angle - 29 Degrees
During the first...
