Plastic/Steel Press Fit Interference

[Chris1980]

First post on these boards. It seems like there's a great group of people here.

I have an application where I'd like to press a molded Polypropylene GF30 piece onto a square steel shaft (about 3/8").

Does anyone know of any design rules of thumb for interference?

Thanks.

 

[patprimmer]

I don't have a number, but it will depend a lot on the radius at the corners of the square and the matching chamfers on the shaft and on the orientation of the glass fibre.

Regards

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.