Chainsaw Repair

I'm not exactly certain what those nylon arbors are .They are scrap ends of round stock from the tool room at work .

The tool and die makers use this material for certain lifting fixtures etc to handle crankshafts cylinder blocks etc used in the manufacture of automotive engines .They use this hard nylon to prevent damage to the finished parts .

It might be some variation of nylon 66 .The material comes in blue,white and black ,assuming  the colors denote the duremeter hardness .At any rate those that I make run very true .

When I cut the arbors to size it's on the shaft and  in the collet with a live center in the tail stock so it's pretty much dead on .I've checked a cylinder when chucked for the cut with a dial indicator and it's right on ,almost no variation ,less than 1 thou .