Author Topic: self aligning bearings in gearboxes  (Read 1578 times)

0 Members and 1 Guest are viewing this topic.

Offline alexd912

  • Full Member
  • **
  • Join Date: Jun 2009
  • Posts: 111
  • Location: Finland
self aligning bearings in gearboxes
« on: 15 Apr 2014 at 14:51 »
Hi all,

Im just reassembling the gearbox on my G31 and the gearbox has self aligning bearings in it.

They are in excellent condition but is it OK to use them in a this type of gearbox?



Best regards
1930 Douglas G31

Offline Doug

  • Administrator
  • ****
  • Join Date: Mar 2004
  • Posts: 3972
  • Location: Glen Mills, PA, USA
Re: self aligning bearings in gearboxes
« Reply #1 on: 15 Apr 2014 at 23:08 »

There is an advantage to using self-aligning rollers on the drive side of the engine, but not in the gearbox. It would be o.k. to leave them be if on the layshaft, but I would have reservations about using them on the mainshaft since that is made up of two pieces on your gearbox design. The standard radial bearing(s) may lend some rigidity to the mainshaft that the self-aligning bearings would lack.

The correct bearings should not be difficult to get. The layshaft are standard metric ball bearings. The mainshaft bearings are an obsolete imperial size, but are still made by RPH.