Porsche Enthusiasts Club Forum

I'm rebuilding my torque tube - anyone got any recommendations for a machine shop to make new plastic bushes for the shaft/bearings ?
thanks

Look here on one of the best threads on this forum for a diy torque tube bearing fit:

viewtopic.php?f=25&t=11696&start=255

about page 18 onwards...

You will have to ask kongsodoken where he got the bearings from

cheers Rob

I believe there's a refurb service around that can replace them for you for around £250.... I'll see if I can find the contact details....

thanks for the replies. I have found a small company on Ebay who are making me 4 new acetal inserts. I extracted the shaft today - tried using a length of tube and a hammer - not a chance, it moved about 1" in half an hour. So made a Pusher, thick metal bar with a M14 nut welded in the centre bolted with M10 threaded rod to the engine end of the torque tube. Used small length of tube over the pilot bearing end to locate six foot M14 rod and wound it in. Very easy and smooth. Drive shaft drops out, fit Very big washer and two lock nuts on the end of the threaded rod and reverse the drive (I used an electric impact driver £59 Machine Mart) - Rubber bearing mounts pop out the other end.

I purchased new super bearings made by Blackseard in the USA they are very expensive around £600 delivered worth every penny IMHO

the hard bit if your making new inserts is making them loose enough so you can push the shaft in without moving the bearing and tight enough to ensure the bearing rotates and not the shaft in the insert, I have seen pictures of aftermarket inserts which have worn though the shaft because they were too loose, the originals were rubber coated steel not delrin or nylon the rubber heated up and shrunk onto the shaft this does not happen with the aftermarket parts and its almost impossible to tell what's happening once installed, as it is such a pain to a job to do I did not risk it

The silicone method I used worked really well as it acts as a lubricant whilst installing then when it goes off it holds everything in place I would recomend this to glue the bearings in place, maybe it would work shaft to insert maybe add some ridges in the insert to keep the silicone in place ...just an idea never tried it

a very satisfying job it it works

thanks for the info and advice on fit and siliconing the rubber bits - I shall (try) and ensure I have a slight interference fit and add silicone inside the tube as you did.