Wheel Bolt Knurl Press Fit Interference
Wheel Bolt Knurl Press Fit Interference
(OP)
We have a 9/16-18 wheel bolt with a straight knurl under the head. What is the typical interference? The low diameter over the knurls is 0.6305. Approximate contact length in the mating part is 0.065 (steel is 1/8" thick and 0.060 max length under head to start of knurl).
Thanks!
Thanks!





RE: Wheel Bolt Knurl Press Fit Interference
You can't reliably come up with a typical interference, interference fits depend on function and in addition there is no need to knurl a diameter to generate a interference fit.
Regards
desertfox
RE: Wheel Bolt Knurl Press Fit Interference
hole diameter = minimum spline/knurl diameter - 0.1 mm
So, for an M12 wheel stud, the hole diameter would be 12.73-12.76 mm, and the spline/knurl diameter would be 12.83-12.86 mm.
RE: Wheel Bolt Knurl Press Fit Interference
I would think you would distort the hub long before you pulled the stud in with any appreciable interference.
What is the application?
RE: Wheel Bolt Knurl Press Fit Interference
I forgot to post a link that shows a variety of knurled/splined/serrated wheel studs:
htt
patdaly,
The interference fit is so that there is torsional resistance between the fastener and the hub during tightening of the wheel to the hub.
RE: Wheel Bolt Knurl Press Fit Interference
RE: Wheel Bolt Knurl Press Fit Interference
RE: Wheel Bolt Knurl Press Fit Interference
In a previous reply, it was mentioned to use .1 mm interference fit, but I was unclear where you found the min/max tolerance of the stud, or is this the taper on the wheel stud?