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thanks for this lead - will follow it up
I bought the machine last year and it was in sad condition, much worse than I realised. When I stripped it down for cleaning and inspection I discovered that the table is supposed to rest on 12 linear bearings lying in the horizontal plane and be located by 6 more inside the rear dovetail. All the rear bearings were missing and only 6 of the horizontal bearings were present. The missing bearings have 48mm long cages and sit loosely in the races in groups of 3. After cleaning in an ultrasonic bath, the bearings that were present are reusable....., do you have existent guides or must those be made too?
Re-machine the 18mm linear races in the top surface of the knee to 20mm and use FF3020 bearings. This looks to be possible but I'm not keen on the idea because it would weaken the side of the race and reduce the clearance between the knee and the table.
[*]Buy 3.5mm diameter x 13.8mm long needle rollers (listed by SKF and NTN) and make my own cages by milling parallel 3.6mm slots in an 18mm wide by 3mm thick aluminium strip. If I go down this path I would replace the 12 missing 48mm bearings with 4 x 145mm units.
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