MadModder

Gallery, Projects and General => How do I?? => Topic started by: PekkaNF on November 24, 2019, 06:41:25 AM

Title: Small internal acme/trapezoidal threads?
Post by: PekkaNF on November 24, 2019, 06:41:25 AM

One guy has problem on making an pretty unstardard thread. I can't help on that one:  TR 15 20 TPI.

ACME and trapetzoidal threads are a litle different and well documented. No problem there. Bastard threads are not that incommon.

Problem description: small internal thread is pretty had to make in lathe single point threading.

1: How small trapetzoidal/acme thread is practical to do single pointing? Looks like threading inserts for under 16 mm shanks are not that common.
https://www.shop-apt.co.uk/threading-inserts.html


2: Making unstardard taps seems to be possible, but trapezoidal thread seems to be pretty hard form cutting. Long taper or series tap? Other ideas?

Pekka

Title: Re: Small internal acme/trapezoidal threads?
Post by: WeldingRod on November 24, 2019, 04:11:14 PM

How strong do you need?  Might cheat and cast the thread in steel filled epoxy...

Sent from my SAMSUNG-SM-G891A using Tapatalk