rastageezer
starting to spend too much on rocks
Member since December 2013
Posts: 169
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Post by rastageezer on Jan 12, 2014 22:59:32 GMT -5
bought some 5/8" bearings and a 5/8" stainless rod and had some difficulty getting them to mesh. Got it with freezing and heating but somehow it seems it shouldn't be that difficult......the pulleys fit fine. Suggestions?
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
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Post by quartz on Jan 13, 2014 0:35:32 GMT -5
A lot of stainless rod is oversize, I've seen it up to .003" over on a 1" rod. The stuff is tough and it takes a lot of polishing to get it to size for a bearing fit. You were fortunate to get it together at all, hopefully without heating the bearing too much. Pulleys are usually made to a more open oversize tolerance. I did some looking and found a size tolerance for cold finished stainless round bar to be +/-.002" for 5/8" dia. Anything bigger than nominal [on size] will be very difficult to put a bearing on.
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QuailRiver
fully equipped rock polisher
Member since May 2008
Posts: 1,622
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Post by QuailRiver on Jan 15, 2014 3:05:45 GMT -5
If the bearings have set screws sometimes there are metal burrs around the bottom edges of the threaded set screw holes that will catch on the arbor. These burrs have to be filed away. I usually use a small fine cut rat tail file to do this with. Larry C.
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Post by Rockoonz on Jan 16, 2014 0:09:50 GMT -5
I use shafting rod for arbor shafts and feed rails, costs quite a bit more but you only buy it once that way.
Lee #2
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