Inner 850cc Clutch Bearing

[thebear54]

If anyone is working on or will be working on a DAF 850cc Twin I think you might find this helpful......

I had to replace this bearing while overhauling my 850cc in the Kalmar Van. DAF original part # 3-31-809348 obviously does not cross over to anything but I knew the bearing measured 22mmx65mmx17mm.
The simple solution would have been to purchase a new bearing. One major problem with that train of thought...that bearing has not been made for over 20 years and finding a NOS one was impossible.

The Clutch shaft on an 850cc measures 22mm OD...the replacement bearing (SKF 6305-2RSJ) measures 25mm ID. Problem!!


The ONLY solution is a reducing bushing effectively taking the 25mm ID down to 22mm ID.

A trip to my local Auto rebuilder (who does all my Starters & Generators) provided me with a Bronze Bushing. It did need some sanding and a little work with a File (because it needs a snug fit).

Final product...

This little trick makes it very easy to find replacement bearings. A standard off-the-shelf # 6305-2RSJ Bearing can now be used for years of worry free motoring.

John

[Nick]

handy to know as mine is a bit graunchy

[macplaxton]

Mar 20, 2013 21:22:47 GMT thebear54 said:

The simple solution would have been to purchase a new bearing. One major problem with that train of thought...that bearing has not been made for over 20 years and finding a NOS one was impossible.

Facts getting in the way of a good story there John?

It's not impossible at all, just not at a price you're prepared to pay.
www.dcnwebshop.nl/?catalogproduct/884362/Speciaallager+vliegwiel+DAF+31+-33,+44,+46,+Kalmar+en+Pony.aspx


In fact, if you do a bit of leg work, a 6305/22 bearing isn't that unusual. But I agree the simple (cheap) solution is to bush out a standard 6305 with either a steel backed split plain bush, like you have, or alternatively bush it out with an plain Oilite bush.

[thebear54]

Granted, they are available through the DCN. BUT...at a bleedin' 70,00 Euro ($ 98.00) each. Plus postage ?? ??
I suppose if you want to piss your money away, but as for me...not a chance in Hell Rich. ;D ;D

Cost of a 6305-2RSJ bearing= $ 7.00
Cost of Bushing= $ 2.50
Cost of postage= $ 0.00= $ 9.50 (7,37 Euro)
.....Which option sounds more appealing ??

Obviously the DCN has commissioned a small (expensive) run of these probably from (FAG Bearings) the original supplier.
DAFHobby also has them available here;
www.dafhobby.nl/daf_produkt.php?idnr=367&title=Lager%20koppelingshuis%2031/32/33/44/46

To avoid any confusion between inner & outer. Item # 24 is the bearing in question...

Which mounts in the lump (not the actual housing) and is a support bearing.

John

[macplaxton]

Mar 20, 2013 21:22:47 GMT thebear54 said:

finding a NOS one was impossible.

Mar 21, 2013 3:38:55 GMT macplaxton said:

It's not impossible at all, just not at a price you're prepared to pay.

Mar 21, 2013 8:43:35 GMT thebear54 said:

Granted, they are available through the DCN....DAFHobby also has them available

OK, so impossible or just expensive? Yep, we agree. It's expensive, but NOT impossible.

Anyway, while we're at it, the bush there is similar to an INA EGB2220-E40 / EGB2215-E40 (depending on whether it is 15mm or 20mm deep) Split plain bronze bush, steel backed.