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Author Topic: Clutch hub bearing assembly  (Read 529 times)

olebmw

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Clutch hub bearing assembly
« on: March 03, 2017, 05:46:09 pm »
 
Is this bearing assembly available from a bearing supply or is it a Guzzi item only.
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banquo

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Re: Clutch hub bearing assembly
« Reply #1 on: March 05, 2017, 04:51:14 pm »
Have you checked the number from the parts list?
I think it's 92 20 14 25, in which case it's a:
(from thisoldtractor):
Inside diameter: 25 mm
Outside diameter: 62 mm
Width: 17 mm
Here are various cross-references:


FAG 6305

SKF 6305

http://simplybearings.co.uk/shop/Bearings-Deep-Groove-Ball-Bearings/c3_11/p5133/SKF-6305-Open-Deep-Groove-Ball-Bearing-25x62x17mm/product_info.html?currency=GBP

Check the parts list though; I'm not sure I have that right!
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olebmw

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Re: Clutch hub bearing assembly
« Reply #2 on: March 09, 2017, 12:09:11 am »
The bearing I need is a three piece assembly, the outer race fits in the center of the clutch hub/gear, the inner race fits on the transmission main shaft and a needle bearing in the middle. I can get the bearing, but not the races so far.
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banquo

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Re: Clutch hub bearing assembly
« Reply #3 on: March 09, 2017, 10:10:02 am »
Which bearing is it on here?


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olebmw

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Re: Clutch hub bearing assembly
« Reply #4 on: March 09, 2017, 05:47:34 pm »
None of the above. In my parts book it is shown with the clutch parts.  I think item 12 and 14 is the inner race and the bearing. The outer race is not shown and may be part of the hub. Adventure Rider site, page 40 ,#787, fifth picture down, has a good shot of the inner bearing race on the input shaft.
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banquo

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Re: Clutch hub bearing assembly
« Reply #5 on: March 09, 2017, 06:41:45 pm »
I'm an idiot; I was looking at the wrong page; the clutch is shown in 2 places in the parts book, and the one I was looking at doesn't show the bearing, so I assumed it was on the casing bearings page. Sorry....
The needle roller is available in Belgium: http://www.icmbikes.be/4_partdetail.asp?bik_id=1820 but is much cheaper from SMS http://www.smotos.de/Ersatzteile/Nuove%20Falcone/Motor-GetriebeTeile_Werkzeug_NUOVOFALCONE%20.pdf who helpfully tell us it's a 32 x 38 x 20, so you should be able to get it from your local bearing shop: http://simplybearings.co.uk/shop/Bearings-Needle-Roller-Bearings-Needle-Roller-Cages/c3_29_30/index.html
If it's a standard inner race, you should be able to get it from the same place, if you measure up, or from SMS (10 08 38 01).
Here's a 28x32x20: http://simplybearings.co.uk/shop/Bearings-Needle-Roller-Bearings-Needle-Roller-Inner-Rings/c3_29_35/index.html
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olebmw

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Re: Clutch hub bearing assembly
« Reply #6 on: March 10, 2017, 11:34:58 pm »
NO, You are not, just a little mistake.  The outer race has a flange on the outside and that seems to be the problem finding one at a bearing supply here. I will check with the places you mentioned and see if they can help. Thanks for your help!!
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banquo

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Re: Clutch hub bearing assembly
« Reply #7 on: March 11, 2017, 10:14:22 am »
Good luck; as you inferred previously, as it's not shown on the parts list, it may well be part of the clutch hub itself, although that would be surprising if it can be detached from the hub.
Looking again at the parts diagram, not only is the outer race not shown separately from the hub, but the hub and primary gear were sold only as a matched pair, on a single part number.
Does the outer race look like it's designed to be removed (e.g. circlip, etc.)?
If not, potentially it could have been cast into the hub, in which case it's not going anywhere.
Is it in really poor shape?
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olebmw

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Re: Clutch hub bearing assembly
« Reply #8 on: March 14, 2017, 12:13:51 am »
The race is removable on mine. It appears that it was defective when it was installed. There is a low spot on the inside edge of the race, approximately 20mm x 10mm  that the bearing doesn't contact. I would guess it warped during the heat treating or something.
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banquo

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Re: Clutch hub bearing assembly
« Reply #9 on: March 14, 2017, 09:03:28 am »
I suppose if the worst comes to the worst, you could have one ground and hardened from bar stock. Is it just a flanged bush?
Photo would be nice, so we can all anticipate a similar fate...
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