Ordered two sets of taper bearings from Moss last week. Annoyingly the inner ones (bigger ones) don't fit as they're too small.
The stub axle measures up as 25mm, the inner diameter of the bearing is 24.6mm.
Looking up on some bearing specialist sites, that type of bearing (30205) is supposed to have an inner diameter of 25mm.
Is 0.4mm (15 thou) a normal tolerance for this kind of thing or have I been sent some poor quality bearings?
Alternatively, do I have a "oversize" stub axle? The outer bearing drops on fine, that's supposedly got an inner diameter of 17mm but according to my verniers is ~16.8mm.
Moss taper bearings don't fit
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Euan Hoosearmy
- Posts: 13
- Joined: Tue Jul 08, 2025 1:40 pm
Re: Moss taper bearings don't fit
Update : They're sending me a second set to see if they fit....
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Splat
- Posts: 469
- Joined: Thu Jun 02, 2011 5:12 am
Re: Moss taper bearings don't fit
Frankly, I wouldn’t buy anything from Moss any more. The “quality” of their parts is beyond crap. I’ve had head studs made from cheese and bearing sets that have lasted less than 100 miles.
After numerous attempts to set up the front hubs using Moss’s shonky parts, I contemplated going down the taper roller route. But in the end, I installed the correct, face-centred SFK bearings about ten years ago (use the search facility to find the part numbers), have done between one and two thousand miles per year since, and haven’t had any problems with them, whatsoever! I drive the car pretty fast (with a few track days) but have never experienced any vibration or pad knock back (MGB callipers, Mintex 1144 pads and cross-drilled 9” rotors).
After numerous attempts to set up the front hubs using Moss’s shonky parts, I contemplated going down the taper roller route. But in the end, I installed the correct, face-centred SFK bearings about ten years ago (use the search facility to find the part numbers), have done between one and two thousand miles per year since, and haven’t had any problems with them, whatsoever! I drive the car pretty fast (with a few track days) but have never experienced any vibration or pad knock back (MGB callipers, Mintex 1144 pads and cross-drilled 9” rotors).