Author Topic: Six spring clutch bearing  (Read 2049 times)

Offline bikerbob

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Six spring clutch bearing
« on: 25.01. 2015 14:18 »
I have been overhauling the A7 it has the 6 spring clutch and decided to replace the clutch bearing and the replacement provided by the dealer Draganfly is as you see in the attached photos, whilst the new one looks to be an improvement on the old one I am a little concerned if it will get enough lubrication the old one being 2 separate bearings is of a more open construction whereas the new one is much more compact. The internal size of the clutch housing is 1.887" whilst the outer dia of the new bearing cage is 1.882".  The bearing cage is made of what looks like some type of aluminium alloy. Your comments please

Offline chaterlea25

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Re: Six spring clutch bearing
« Reply #1 on: 25.01. 2015 16:05 »
Hi,
Quote
The internal size of the clutch housing is 1.887" whilst the outer dia of the new bearing cage is 1.882".  The bearing cage is made of what looks like some type of aluminium alloy. Your comments please

THe cage has to be smaller than the outer bearing race and larger than the inner
the ball bearings will be (or should be) of a larger diamater than the thickness of the cage
Other than that it would be a bush not a bearing

HTH
John
1961 Super Rocket
1963 RGS (ongoing)

Offline bikerbob

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Re: Six spring clutch bearing
« Reply #2 on: 25.01. 2015 16:42 »
I understand that the cage has to be smaller than the outer bearing race and the balls are slightly bigger they are the same size 3/16" as the original bearings I listed the sizes to point out that there is only.007 difference as this is where the lubrication will have to go through.

Offline chaterlea25

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Re: Six spring clutch bearing
« Reply #3 on: 25.01. 2015 19:11 »
HI Bob,
Put some high temperature grease on the bearings if you are worried
On Ariels theres a needle roller bearing and a bronze cage, this sits between the chaincase which has oil in it and the clutch which runs dry, The bearing never seems to wear  *good3*

John
1961 Super Rocket
1963 RGS (ongoing)

Online KiwiGF

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Re: Six spring clutch bearing
« Reply #4 on: 25.01. 2015 22:03 »
I have the draganfly bearing and have done 4000 miles no problems so far but the cage part with the holes in it did show signs of wear in the form of a grey paste when I took a look at around the 1500 mile mark (I was replacing the primary case gasket...yet again  *problem* so took the opportunity to inspect it).

My 6 spring clutch works perfectly with no slip and easy neutral finding at standstill, the secret in my case was to have the springs only tight enough to prevent clutch slip but not over tight (found by trial and error) , and to use a dial guage to ensure the pressure plate lifts off evenly.
New Zealand

1956 A10 Golden Flash (1st finished project)

1949 B31 rigid “400cc hot rod” (2nd finished project, + favourite bike)

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Offline bikerbob

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Re: Six spring clutch bearing
« Reply #5 on: 26.01. 2015 08:10 »
Thanks for those replies you have to use a bit of grease to hold the balls in place while you fit the clutch basket I will fit the new bearing and check it after a year as I will probably only do about that mileage on this bike.

Online Clive54bsa

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Re: Six spring clutch bearing
« Reply #6 on: 26.01. 2015 16:30 »
Hi Bikerbob, I also purchased the "Draganfly" roller cage for my  '54GF, but, after running it for a couple of hundred miles, felt there was a bit too much slop in the chain wheel, and went back to the conventional bearing, which works well. Although I think the Draganfly unit is easier to fit.


'54 GF,  '61 SR,  '71 B50MX

Online RichardL

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Re: Six spring clutch bearing
« Reply #7 on: 26.01. 2015 23:01 »
I will fit the new bearing and check it after a year as I will probably only do about that mileage on this bike.

So, this means you are not going to check it the very next time it has to come apart? >:D ;)

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020 (if it's not cancelled and we are free to move about by then). Watch website at https://www.gentlemansride.com for details.

Offline bikerbob

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Re: Six spring clutch bearing
« Reply #8 on: 27.01. 2015 14:32 »
Richard. Obviously if  for some reason I had to take the primary case off in the next year I would look at it but as I do not expect anything to go wrong over the summer months as I do not do a great mileage having also a BSA A65 I am hoping to leave it until next winter when I will look at it again to see how it is standing up along with a modification that I did to the rear of the primary case where I fitted an oil seal that runs on the gearbox mainshaft.

Online RichardL

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Re: Six spring clutch bearing
« Reply #9 on: 27.01. 2015 15:46 »
Bob,

That's a much more serious answer than I meant to spawn. I was joking about time between A10 disassemblings. Apparently, it's mostly my A10.

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020 (if it's not cancelled and we are free to move about by then). Watch website at https://www.gentlemansride.com for details.

Offline taylor1960

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Re: Six spring clutch bearing
« Reply #10 on: 22.12. 2015 22:36 »
Hi Bob im going to fit a 6 spring clutch to my A10 is your bearing still holding up i need a new one and at this stage can get eather new or old type  *conf*
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier

Offline bikerbob

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Re: Six spring clutch bearing
« Reply #11 on: 23.12. 2015 14:39 »
I have just dismantled the primary side to cure an oil leak from the gearbox and can confirm that the Draganfly bearing is working great  no signs of any problems with the clutch, with the Draganfly bearing fitted there is no wobble on the clutch basket which was there with the old style bearings fitted.

Offline chaterlea25

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Re: Six spring clutch bearing
« Reply #12 on: 23.12. 2015 18:38 »
Hi,
A lot of the "pattern" original type bearings are a very loose fit on the shaft adaptor  *warn* *warn* *problem* *problem* *angry* *angry* *angry*
So  I would avoid these !!

John
1961 Super Rocket
1963 RGS (ongoing)

Offline Tumbleweed

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Re: Six spring clutch bearing
« Reply #13 on: 13.01. 2016 20:21 »
hi bob, looking at the pics mine don't fit so good ive managed to get a pic ,  a third of the bearing is not being used by the looks of it , and there is still loads of play, have you any ideas please     thanks tw
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Offline taylor1960

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Re: Six spring clutch bearing
« Reply #14 on: 14.01. 2016 08:29 »
Hii did U fit the plate behind the clutch basket first   *????*
1960 BSA A10
1999 Honda CB 500
1978 Can-Am Bomardier