Ball joint press fit tolerance?

Jim Moser · Nov 28, 2020

Just curious how tight a press fit I should use with these press in ball joints. 1.75 OD 303 SS into 3/4 inch 304 SS. Dont want to distort the housing but dont want them moving either. Should it be just interference or. 001 undersize. I just roughed it out to 1-5/8 inch

This is for a tiller arm connecting arm hydraulic steering in a commercial fishing boat

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Ken hosford · Nov 29, 2020

Stainless on stainless and press fits generally equal galling at that size .001 should work get dry ice chill inner heat outer it would be wise to make arbor that allows you to press on outer ring only if you press on inner it will expand outer the outer is cracked to get inner in

Garwood · Nov 29, 2020

Ken hosford said:
Stainless on stainless and press fits generally equal galling at that size .001 should work get dry ice chill inner heat outer it would be wise to make arbor that allows you to press on outer ring only if you press on inner it will expand outer the outer is cracked to get inner in

Does 303 gall? 303 is like silver colored brass.

tdmidget · Nov 29, 2020

Ken hosford said:
Stainless on stainless and press fits generally equal galling at that size .001 should work get dry ice chill inner heat outer it would be wise to make arbor that allows you to press on outer ring only if you press on inner it will expand outer the outer is cracked to get inner in

Where did you get a fucked up idea like that? Do you see a crack in the outer race? I worked in a shop that made those and quite possibly that one and none had a crack. The race is swaged around the ball . There are some that have a crack but they are as hard as glass and that certainly won't be the case with 303 stainless.
You need to know the clearance of the ball to the race. If you have that much interference then you will lock it up because the race will close up at least that amount. It would be better to secure it with snap rings if you are worried about movement but since there does not appear to be enough meat in the crank arm Locktite might do it .

Illinoyance · Nov 30, 2020

The manufacturer of the ball joint will surely provide press fit recommendations.

Ken hosford · Nov 30, 2020

Steel one are often machined then fractured I have taken apart them cut slit wider to tighten them up Stainless may be swaged They were RBC?

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Ball joint press fit tolerance?

Jim Moser

Hot Rolled

Ken hosford

Cast Iron

Garwood

Diamond

tdmidget

Diamond

Illinoyance

Stainless

Ken hosford

Cast Iron

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