my build

[jonm]

going to attempt to grind down screws to 8mm then use skate bearing .. with thrust bearing either side , on evilbay thrust bearings for £1.90 each

cant find angular contact bearings at 8mm, and magneto bearings are £6 each ....... i am after all scotsman

[jonm]

never mind.. soon be time to iron last years xmas wrapping paper....
and tippex the cards..

[jonm]

cheers kip
bag of bearings arrived from " gap bearings " today...
will feed three 12mm bearings on to trapeziod screw fix bearings down with these drill on one end , then attack with grinder... sounds so simple....... we will see

[jonm]

worked a treat took the threads of with grinder ....last few mil with a file .......
threaded end for m8 nut

[irving2008]

worked a treat took the threads of with grinder ....last few mil with a file .......
threaded end for m8 nut

I am impressed Jon. How did you jig the grinder to control the attack?

[jonm]

irving
done it free hand , went down with the grinder till just the very bottom of the threads were left, then set calipers to 8mm ( screw still turning with drill) and used file to take it down the rest .. checking with calipers took about a hour to do .... happy with the result
should eliminate endfloat with thrust bearings