Needing a pinion bearing retaining ring please!

[Damian GT]

Hi all,

Looking for the pinion retaining ring for a 1931 (long nose banjo) rear axle. Managed to find a torque tube for my axle build at Beaulieu thanks to Tom Hunt - now the search begins for the ring that secures the pinion bearings into the bottom of the torque tube.  If you have one tucked away somewhere I would be most grateful.. Thanks very much..

[Chris KC]

Damian,
Sorry I don't have a spare, but I do have a '31 axle in bits on my bench at the moment, so if there's anything you'd like photographed or measured up it's a great time to ask...
Cheers,
Chris

[Damian GT]

Yes please Chris.  That would be much appreciated - any photos of the 'exploded' view would be much appreciated and particularly if you can get me an image of the pinion bearing ring that would be great so I can post it for others to see - I'm hoping my definition makes sense - we're talking about the the ring that screws into the bottom of the torque tube to retain the bearings of course!!  Thanks for your help..

[Chris KC]

Will try and take some pics tonight.

[Chris KC]

Hi Damian,

First an exploded view (from J. Platt's catalogue, with apologies to all concerned)

   

Photo of front end parts - n.b. I'm missing the flange nut at present.
So it goes nut - lock washer - flange - key - bearing retainer - bearing (R&M LJ7/8)

   

Photo of rear end parts
Nut - lock washer - A/C bearing pair (R&M LJT1, thrust faces together) - bearing retainer - distance piece - bearing (R&M MJ1)
n.b. if you're super observant you'll notice my bearing nut has a RH thread, apparently not many do.
My distance piece is rather worn and I think not original; but consensus is it should be 0.625" long.

   

Here's a close up of the bearing retainer

   

The retainer is 0.585" deep, 2.485" OD, 1.935" ID, 0.15" flange thickness, 4 equispaced slots on flange OD each 0.25" wide and approx. 0.05" deep, it has a RH thread about 2.305" OD 2.235" root dia & 16 TPI, with 0.075" undercut up to the flange (all measured quickly with vernier calipers).

Finally a shot of the set-up I will use to measure run-out of the crown wheel / diff cage, not quite there yet as it needs to be bolted up, CW in place etc. I only add this snap because when Jack French - for whom I had the greatest respect - said 'spin it on a half shaft' I think it was an off-hand remark and you need something a bit more robust if you are going to measure 0.004" precisely.

   

Hope this answers your question Damian and do let me know if you need anything more, I can just as easily add the banjo end parts if you need them.

[Damian GT]

Hi Damian,

First an exploded view (from J. Platt's catalogue, with apologies to all concerned)



Photo of front end parts - n.b. I'm missing the flange nut at present.
So it goes nut - lock washer - flange - key - bearing retainer - bearing (R&M LJ7/8)



Photo of rear end parts
Nut - lock washer - A/C bearing pair (R&M LJT1, thrust faces together) - bearing retainer - distance piece - bearing (R&M MJ1)
n.b. if you're super observant you'll notice my bearing nut has a RH thread, apparently not many do.
My distance piece is rather worn and I think not original; but consensus is it should be 0.625" long.



Here's a close up of the bearing retainer



The retainer is 0.585" deep, 2.485" OD, 1.935" ID, 0.15" flange thickness, 4 equispaced slots on flange OD each 0.25" wide and approx. 0.05" deep, it has a RH thread about 2.305" OD 2.235" root dia & 16 TPI, with 0.075" undercut up to the flange (all measured quickly with vernier calipers).

Finally a shot of the set-up I will use to measure run-out of the crown wheel / diff cage, not quite there yet as it needs to be bolted up, CW in place etc. I only add this snap because when Jack French - for whom I had the greatest respect - said 'spin it on a half shaft' I think it was an off-hand remark and you need something a bit more robust if you are going to measure 0.004" precisely.



Hope this answers your question Damian and do let me know if you need anything more, I can just as easily add the banjo end parts if you need them.

Thanks Chris - that is absolutely excellent - much appreciated.  It would be good if we could switch all these images to the main thread so they don't end up buried in the 'wants' section.. BW Damian.

[Chris KC]

Now moved to main forum so giving this a wee bump up the timeline

[Tony Betts]

These retainers for the 1931 and 1932 axle were made with both left and right hand thread.

Make sure you get the right one you need.

Tony.