Bevel shaft coupling sleeve - (Oldham coupling)

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steveroyall
Cucciolo - the Lil Pup
Posts: 3
Joined: Sun May 25, 2014 12:48 am
Location: Ashtead, Surrey UK

Bevel shaft coupling sleeve - (Oldham coupling)

Post by steveroyall » Sat Jul 05, 2014 3:04 am

The reason my 1974 250 scr went to the back of the shed 20 years ago was because of an awful cam noise.
I tracked it down to the faces where the upper and lower bevel bevel shafts join, these had starting to wear. This in effect allowed the whole upper bevel assembly to have some play allowing the cam to 'push back' and create a god awful slapping noise on the cam.

20 years later, I've got a replacement set of bevel gears :-D but I notice that the new sleeve (oldham coupling) that goes over them is way too big and I've got some play in there already. Alarm bells are ringing :shock:
The bevel shaft diameter is 14.97mm and the sleeve inner diameter is 15.04mm

Does anyone here know where I could get an undersized sleeve to ensure a tight fit between the faces? Has anyone here had the same issue?

Thanks
Steve in sunny Surrey UK

machten
MHR / S2
Posts: 481
Joined: Sun Oct 29, 2006 8:37 am
Location: Perth, Western Australia

Re: Bevel shaft coupling sleeve - (Oldham coupling)

Post by machten » Sun Jul 06, 2014 2:26 am

Yep, I've seen it on my 450. I think you will only need a standard coupling sleeve. Sounds like yours is worn. I have a stock unused sleeve that (only using a digital vernier) gauges at 14.98mm. Under sizes are not easy to find in my experience.

Kev

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Craig in France
Cagiva Elefant
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Joined: Tue Mar 23, 2004 3:58 pm
Location: Montpellier, France

Re: Bevel shaft coupling sleeve - (Oldham coupling)

Post by Craig in France » Sun Jul 06, 2014 3:24 am

steveroyall wrote:Does anyone here know where I could get an undersized sleeve to ensure a tight fit between the faces? Has anyone here had the same issue?
Have a word with Nigel Lacey, Simon. He's away at the mo', but back on 9 July.

01305 822549.
http://www.laceyducati.co.uk/ducati-parts/

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