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Looking for solution to incorrigibly jumpy needle roller bearings

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Bill Phinn	01/07/2022 21:31:46
1076 forum posts 129 photos	Just to round off this thread, a quick word on how the new bearings I put in have been faring after nearly a year's use. I opted for an Oilite bushing in the end which I cut two 6mm thick slices off before milling out the internal diameters to size on a rotary table. I'm pleased to report that after probably 50-60 hours of use, including some full day sessions involving cutting thick privets with some stems over 15mm thick, the bearings are performing very well, with no noticeable wear. One further advantage over the original bearings (apart from them holding up better) is that there's noticeably less friction in the gear box, so the blades reciprocate slightly faster and the gearbox gets less hot in use. Thanks again for everyone's contributions.
Hopper	02/07/2022 03:15:09
7881 forum posts 397 photos	Looks like that has worked remarkably well. What was the thinking behind milling the ID with a rotary table rather than boring it in the lathe?
Bill Phinn	02/07/2022 14:16:35
1076 forum posts 129 photos	Posted by Hopper on 02/07/2022 03:15:09: What was the thinking behind milling the ID with a rotary table rather than boring it in the lathe? I've still got no metal lathe. There's a related thread of mine here. I did end up buying the boring head I suggested I would in that other thread, but I'd already milled out the bushings by that point.

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