Front hub, bearing fit

[thomas g. warner]

I am in the process of redesigning the front wheel bearing puller to make it
as stong as possible. I noticed when checking the tlerances of the front
hub (2.0015 to 2.0020") that is can be .0020" smaller than the timken
bearing inside race (2.0000"). Is this what you would call an interference fit?

>Hi all,
>
>I'm back on the list. Haven't been on for a few months. The GMC gets into
>your blood I think - anyway, it has become a way of life for me to a large
>extent.
>
>I NEED HELP! Anyone have information on the hot water heater 26' side bath
>on right; (6 gal unit). I'm in dire need and remember someone now producing
>a SS unit from old communications. As I remember they had an immediate
>contact number and would accept VISA and ship next day? I need ASAP:
>picksam or P/F Hm. 304-684-0076, O 304-652-8388. Thanks in
>advance.
>
>Now, regarding welding those ball joint bolts - I wouldn't. The bolt is
>designed (especially grade 8) to hold that load. Welding alters the temper
>and strength and could even damage the bolt. Locking the nut is the only
>option from my point of view.
>
>Wheel bearings: one must be careful when doing by feel. I'm a consulting
>engineering (site; www.lacrew.com/pdm) and deal in bearing analysis and
>calculations. One must go to the books. A stationary inner ring usually has
>a zero fit and can be slipped on, no interference fit -- no so with the
>rotating inner ring. The rotating inner ring has an interference fit, but as
>will most all things, those fits have tolerance limits (upper and lower):
>'feel' isn't a subsitute for measuring with micrometers. When both inner
>and outter rings rotate as part of the operational process then one usually
>has to make those calculations on his or her own. Those data and information
>are usually propriority and not generally published.
>
>My $0.02 worth. Thanks for the help in advance.
>
>Regards,
>
>Sam Pickens
>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach

 

[thomas g. warner]

RemeMber in the GMC knuckle and hub both the inner and outer race are
interference fit and the inner race rotates.

For instance the specs that I am getting from a 4T-LM104911 outer race and
4T-LM104949E inner race bearing, japan JL NTN are:

Outer race diameter = 3.250" and the iside of the hub (cinnabars specs is
3.2510" to 3.2525"
Inner race diameter = 1.990 and the hub diameter is (Cinnabar specs) 2.0015
to 2.0020"

the bearing came out of the knuckle quite easily as the specs would
indicate. But the inner race was very difficult coming off the hub.

If you have tolerances for this exact bearing I would appreciate it.

>Sam Pickens here;
>
>Thanks for the rapid response regarding the water heater. This goes to show
>what a great group this is. May the fleas of a thousand camels rest in your
>worst enemy's naval. I'll call Jim DeMaere for the heater. Again, thanks.
>
>Regarding the Timken brg fo 2.0015 to 2.002 inches. If the shaft is 0.002"
>greater than the inner raceway (inner ring), then it's an interference fit
>by 0.002". The shaft is bigger than the bearing race. You can give me
>bearings numbers and I can be more specific. Normally, on a wheel bearing
>the outter ring rotates while the inner ring is stationary. With this
>configuration the outter ring normally has an interference fit and the inner
>ring would have a fit of zero or maybe loose by 0.001" no more. Of course
>these are numbers I'm giving you off the top of my head. I'd rather give
>exact facts but I'm comfortable with those numbers. I hope I cleared rather
>than muddyed the water.
>
>Regards,
>
>Sam Pickens
>>I am in the process of redesigning the front wheel bearing puller to make
>it
>>as stong as possible. I noticed when checking the tlerances of the front
>>hub (2.0015 to 2.0020") that is can be .0020" smaller than the timken
>>bearing inside race (2.0000"). Is this what you would call an interference
>fit?
>>
>>
>>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach