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Micha
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Joined: 10/12/2007
Posts: 390

The site of Salis Parts has an interesting note about this bearing: If the rear bearing holder is not replaced, a CN grade bearing should be used, and if that bearing holder is going to be replaced, then a C3 grade bearing should be installed.
CN = clearance 6-20

My local bearing shop does not stock the 6207 with a CN grade; instead he has a TNT Japan 6207 item with CM tolerance class, which is 9-17 clearance.
Do you think it will function correctly?
Seems there are no CN bearings around here…

  • bearing.png
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Michael Steinmann
R51/3 1952
Engine Nr. 529466

wa1nca
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Ashfield Ma.
Joined: 09/27/2012
Posts: 627
CN bearing

Micha wrote:

The site of Salis Parts has an interesting note about this bearing: If the rear bearing holder is not replaced, a CN grade bearing should be used, and if that bearing holder is going to be replaced, then a C3 grade bearing should be installed.
CN = clearance 6-20

My local bearing shop does not stock the 6207 with a CN grade; instead he has a TNT Japan 6207 item with CM tolerance class, which is 9-17 clearance.
Do you think it will function correctly?
Seems there are no CN bearings around here…

I ordered 2 cn bearings 0711 998 1245 (EU 54.65) from Salis for my rebuild
Shipping here (US) was EU 40.00 but worth it as I ordered over EU 900.00 in total
Im sure shipping cost for you would be less as your in the EU
Tommy

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Tommy Byrnes
54 R51/3 55 R50 64 R27 68 R69US 68 Sears Allstate 250 (Puch)

Micha
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Posts: 390
Thanks Tommy. Regarding the

Thanks Tommy.
Regarding the price, this NTN bearing was offered to me for 24 NIS, that's about 7 US$.
But then again - I would like to know if this clearance difference is so critical.

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Michael Steinmann
R51/3 1952
Engine Nr. 529466

MikeL46
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Joined: 01/01/2016
Posts: 79
If the numbers you posted are

If the numbers you posted are real, the CM 9-17 clearance falls within the CN 6-20 range. So, I would say go for it.

Mike

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67 R50/2 w/R100 engine/trans and Ural Sidecar
69 R60/2 76 R90S 78 R100RS
70 Triumph w/Spirit Eagle Sidecar

Micha
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Joined: 10/12/2007
Posts: 390
Thanks Mike.

Thanks Mike.

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Michael Steinmann
R51/3 1952
Engine Nr. 529466

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