flyingbrick Posted December 6, 2015 Share Posted December 6, 2015 Only need a sharp piece of tool steel and a flat end drill to machine urethane. Ive been machining it most werks, for the last few years. Never had it fly out of the chuck either. Do you do the hole before or after machining the ID? I was resizing bushes that had been poured and HOLY SHIT it was frustrating. I tried holding it on a bolt..fail. Got there in the end but only because nobody else will ever see that bush again (and its not critical) Quote Link to comment Share on other sites More sharing options...
nvmyvl Posted December 6, 2015 Share Posted December 6, 2015 For a shouldered bush, i machine the centre hole to size. Then make a mandrel to suit the id. This is a tight fit to the id. Then machine the od major, then od minor. For plain bush, do the same but only do od major. The suspension grade is easy to machine, as its 90A shore hardness. Try the 60A shore hardness stuff, you will pull your hair out before it is right. We grind finish the soft rollers Quote Link to comment Share on other sites More sharing options...
sr2 Posted December 9, 2015 Author Share Posted December 9, 2015 Thanks for all the info guys, I was looking at making rear suspension leaf spring bushes for the latest project. Just found out Basis have them new in stock, bloody amazing for a 70 year old car! 2 Quote Link to comment Share on other sites More sharing options...
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