Section : Gearbox

Clutch, gearbox, overdrive, propeller shaft.

How many lay shaft needle rollers???

Posted By : Van Hamlin, 31-Dec-2003, 07:31pm

I am rebuilding a gear box. I am using needle rollers from Rimmers. They supply a bag of 50 but say to use only 24 at each end. I cannot find any other references to how many to use.

I tipped the old needle rollers out of the lay shaft and there were 25 in each end.

25 of the Rimmers rollers will fit in comfortably.

So my inclination is to fit 25.

Those of you out there who have rebuilt gear boxes - have you used 24 or 25??

Thanks in anticipation...
Van

Followups :

How many lay shaft needle rollers???

Posted By : Nigel Gibbins, 01-Jan-2004, 10:02am

Van,

I used 25 in mine and haven't had any problems with them. My thoughts were if they supply 50 then I should fit 50...!

On the other hand though I wouldn't expect that only using 24 of the little buggers would really make that much difference but will allow a bit more room for grease etc.

NiG
- How many lay shaft needle rollers???
  
  Posted By : Josh Bowler, 01-Jan-2004, 12:45pm
  
  i read on the dolomite board a while ago that some of the needle bearings used now are metric hence 24 not 25 used??
  - How many lay shaft needle rollers???
    
    Posted By : Van Hamlin, 01-Jan-2004, 03:48pm
    
    Thanks for the quick replies!
    
    Interesting about metric ones, I would have thought if any part like a bearing was a metric one off the shelf it would have to be indistinguishably close to the imperial one.
    
    The old ones are 2.37 mm dia (possibly designed to work in a gap of 1/10"?) The new ones are 2.36 mm, so the new ones are actually slightly smaller than the used ones!
    
    Both old and new layshafts are within spec, so it is not a case of layshaft and needle rollers being supplied in matched sizes.
    
    Regards
    Van
    - How many lay shaft needle rollers???
      
      Posted By : Iain Davidson, 29-Apr-2004, 10:04am
      
      I got mine from Rimmer too and followed their instructions - 24 each end.
      
      Yet to test it though. Fingers crossed!
      - How many lay shaft needle rollers???
        
        Posted By : Van Hamlin, 02-Jun-2004, 10:42pm
        
        Now done 2,400 miles on gearbox with 25 each end and everything seems fine.
        Van