icewlf
off to a rocking start
Member since December 2022
Posts: 15
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Post by icewlf on Mar 11, 2023 12:03:20 GMT -5
Looking for advice and knowledge. I’ve got an old Rocks brand cabbing machine. I’m going to replace the silicon carbide grinding wheel as it’s badly grooved. I’m also replacing the rubber on one split drum (I have 2 that need it but I want to see if the new rubber will be enough on one before I replace the second as I’m worried I may need to replace the split drums). my first question is, what grit Diamond wheel do you recommend I replace the silicon carbide one with? I think the existing is 220, but unfortunately the actual grit has rubbed off the label. second question, based on the design, if I need to replace the split drums, I’m assuming I’ll have to remove the bearings, pulley, etc and pull the arbor all the way out of the case. For any of you who’ve worked on older machines, is this a correct assumption, and what types of surprises should I prepare for?
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Post by manofglass on Mar 11, 2023 13:58:52 GMT -5
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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 Mar 11, 2023 14:16:37 GMT -5
I acquired a bunch of paper backed sandpaper in with SiC cloth backed in a big box, use the paper backed on split or "thump" wheels for shaping wood. I've replaced the lining on the wheels with the shelf/drawer liner that has all the little holes in it, has worked very well. Being made of rubber, it should do as well wet as dry.
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Post by perkins17 on Mar 11, 2023 14:56:19 GMT -5
Badly grooved is nothing for a silicon cabinet wheel. I ran one of those and an expandable drum for close to six months on my arbor. Go to Kingsley north and get a diamond "T" bar dresser, and cut it smooth with lots of water.
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stefan
Cave Dweller
Member since January 2005
Posts: 14,095
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Post by stefan on Mar 13, 2023 13:54:43 GMT -5
Some machines come right apart with no issues. Yours looks to be pretty well taken care of, so I would not expect a huge issue. Some machines will need a bearing puller, and arbor press, and more patience. Rust remover and steel wool will go a long way to making the job easier. If you end up replacing one wheel, you mind as well do them all (and the belts and bearings while you're at it). Take it apart once, put it together once. As for diamond hard wheels a 60 or 80 grit is a nice starting point for course. 220 is not very aggressive unless your cutting a lot of softer material. I have a 80 grit hard wheel, and add a 60 grit flat lap on the end to do most of my rough grinding.
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