Shaft-hole fits, metal and plastic
Shaft-hole fits, metal and plastic
(OP)
I am looking for some tables on shaft-hole fits for a stainless dowel pin into a plastic part (ABS and Polypropylene). Does any one have this information, or a link? The machinery's handbook only talks about metal-metal fits.
specifically i an looking to press an M5 pin into an ABS disk, that will need to be removed periodically for maintenance.
specifically i an looking to press an M5 pin into an ABS disk, that will need to be removed periodically for maintenance.





RE: Shaft-hole fits, metal and plastic
RE: Shaft-hole fits, metal and plastic
RE: Shaft-hole fits, metal and plastic
To overcome this in plastic inlet manifolds on cars, they insert metal ferules or crush tubes, which bear the creep load.
Regards
pat pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Shaft-hole fits, metal and plastic
RE: Shaft-hole fits, metal and plastic
I don't have data, and can only advise that you enquire with all the major long established, reputable raw material suppliers like Bayer, Dupont, Ticona, BASF, GE, DSM, Basel, Atofina etc
Regards
pat pprimmer@acay.com.au
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Shaft-hole fits, metal and plastic
I again refers you to Dupont "General Design Principles for DuPont Engineering Polymers" which can be found on the web. They have a whole chapter on the issue. I do not believe the press fit will disappear but it will decrease. Using the info on Dupont document you can calculate the residual press fit.
You might consider a splined pin and a splined hole, the teeth will take the torque.