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what size ball bearing?

Posted: Tue May 30, 2017 8:46 pm
by Mike A
Can anyone tell me the correct size ball bearing for my '69 B44VS clutch operating rack? I keep coming up with 7/32, which seems way too big, as the size when I search suppliers websites yet the actual recess in the rack will only accept a 4/32 ball? (it sits comfortably at half depth) would a 4/32 do the job?

Re: what size ball bearing?

Posted: Tue May 30, 2017 9:48 pm
by midgie
Try 5/32" mike.

Re: what size ball bearing?

Posted: Wed May 31, 2017 6:17 am
by Mike A
midgie wrote:Try 5/32" mike.
I'd agree Midgie, it makes more sense than a 7/32"

Re: what size ball bearing?

Posted: Wed May 31, 2017 11:58 am
by b50root
ball.JPG
This one? No 59

Rickard

Re: what size ball bearing?

Posted: Wed May 31, 2017 10:56 pm
by Mike A
b50root wrote:
ball.JPG
This one? No 59

Rickard
No, it's like I said in the original post, 7/32" is quoted but there is no way it will fit, I've got a few and tried them, they just sit on the top of the rack, I have two outer covers and both have the rack machined for a smaller ball, as Midgie said, 5/32"

Re: what size ball bearing?

Posted: Thu Jun 01, 2017 10:14 am
by Ubert767
b44icon
I've recently fitted a 7/32" ball to my 1970 B44VS, obtained from P.E.S. (Part No. 70-8019), after hell's own job of removing a worn 1/4" ball which had been previously forced into the recess. I assume that freedom for the ball to rotate in the socket is a good thing.
Rob

Re: what size ball bearing?

Posted: Thu Jun 01, 2017 10:29 am
by Mike A
It turns out that the balls I purchased (that were sold sold as clutch rack balls) were certainly NOT 7/32" but a fair bit larger, I have now got the correct size so it's problem solved! :smile:

Re: what size ball bearing?

Posted: Thu Jun 01, 2017 8:25 pm
by b50root
Mike A wrote: I have now got the correct size so it's problem solved! :smile:
So the 7/32" is right then?

Rickard

Re: what size ball bearing?

Posted: Thu Jun 01, 2017 10:06 pm
by Victor500T
7/32" is right according to the Rupert Ratio book. Not measured the one out of mine with a mic yet but it looks certainly smaller than 1/4".

Re: what size ball bearing?

Posted: Thu Jun 01, 2017 10:19 pm
by midgie
Victor500T wrote:7/32" is right according to the Rupert Ratio book. Not measured the one out of mine with a mic yet but it looks certainly smaller than 1/4".
yes 7/32" is correct my mistake when I said 5/32" (old age) :thumb

Re: what size ball bearing?

Posted: Fri Jun 02, 2017 2:33 am
by koncretekid
7/32" --- I found out the hard way. But, if you're having trouble finding them, try your K*wasak* dealer. Mine had a whole bag of them with a K*wasak* part number. The Japanese frequently used imperial sized ball bearings in their steering stem bearings.

Re: what size ball bearing?

Posted: Fri Jun 02, 2017 4:50 am
by Mike A
b50root wrote:
Mike A wrote: I have now got the correct size so it's problem solved! :smile:
So the 7/32" is right then?

Rickard
Yes, it will teach me to measure things rather than accept what the supplier says :oops:

Re: what size ball bearing?

Posted: Fri Jun 02, 2017 5:56 am
by b50root
DonĀ“t forget that we have some resorces here in the Spareparts database!!

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data.JPG
Rickard

Re: what size ball bearing?

Posted: Sun Jun 04, 2017 10:11 am
by Mike A
Just out of interest I've just found a way of getting an obstinate ball out of the rack, I just put a blowtorch on it for 30 seconds or so, the ball popped out and shot across the workshop! it turned the grease it was seated in with into gas and expanded I reckon.

Re: what size ball bearing?

Posted: Sun Jun 04, 2017 10:54 am
by minetymenace
OMG WMD :shock:

Re: what size ball bearing?

Posted: Sun Jun 04, 2017 11:04 am
by Mike A
minetymenace wrote:OMG WMD :shock:
Haha! not quite that deadly, it did make me jump though..I thought it would just roll out :lol: