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Southern IA | I have some 7/8" bore bronze bushings that are 1-1/2" long I need to open up about 0.010" on the bore diameter. Any ideas how to accomplish this in a farm shop on a budget. |
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Central Sask. RM#254, Canada | Use a brake cylinder hone to polish it out .. |
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Southern IA | local guy said 0.010" is a lot of material to expect a hone to remove, have you done it? |
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Between Omaha and Des Moines, 7 miles South of I80 | 7/8" = .875; so you need to go to roughly .885" Well, would .886" be OK? = 22.5 mm and there is a drill bit for that (metric) http://www.ebay.com/itm/like/321201846337?lpid=82 |
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Wallis, TX | Reamer, I got a set on Ebay for around a hundred bucks. Never really looked, but I bet you could find a single adjustable one in your size range or possibly a fixed sized one. |
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Northeast Nebraska | Honeing will take a LOOONNNNGGG time and trying to drill out .010 out of bronze at that diameter is asking for trouble... Unless you can put the bushings in a lathe and the drill in the tailstock.. even then, don't expect the finish to be great... Plus it will still grab like crazy... but at least can be done...
Best bet is to have a small shop bore them out. Or do you have a lathe and a boring bar? Shouldn't take long and shouldn't cost much more thna $50. (Or LESS if you find the right shop!)
I know, famous last words...
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Iowa | I think you can get a .8858 chucking reamer but they may be $75 or more. The reamer with the bushing chucked in a lathe would be ideal but you may able to use a drill press or hand drill though I've never done it. Edit: Just remembered that I have use valve grinding compound to "fit" a bushing to a shaft before in a pinch on some things with non-critical tolerances.
Edited by J.L. 3/17/2014 23:25
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Pedee, Oregon | Die grinder flap wheel in a drill or drill press, with lubricant. Go slow, have a bolt or a pin you can check the bore size with easily. |
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NW Washington | Maybe you could find a bushing with a 22 mm inside diameter. That would be cheaper than finding an adjustable ream that size. Holding the bushing while reaming would be another problem.
Using a boring bar on a metal lathe would be a quick way to increase the ID.
Any machine shops in your area, or a friend with a lathe. |
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Mifflintown, PA | Just did this exact thing this past weekend; however, I used a hobby lathe. This was the first project for it. It was very quick work to do six of them, not even 10 minutes. I would find a shop or individual with a lathe. Or if you can swing it a Chinese 7x14 lathe is what I got and feel it will pay me back nice and quick. |
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Sac & Story county IA | Depends on the recipe of the bushing. Some it is easy to hold to .001". Some turns terrible. 660 bronze is good. Lathe and boring bar is what I would use. |
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SC Iowa | I bought a set of these http://www.harborfreight.com/11-piece-adjustable-hand-reamer-set-38... |
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Sandy Hook, MB | Hello Clicker
If you are talking about an Oilite bronze bushing, honing or grinding is not recommended as it will smear the bronze material & close up the pores blocking the lubricant. You can bore it out though if you use the right technique.
http://www.oilite.com/bmp.asp |
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S.E. Iowa | Take it to a machine shop and have them use a sunnen rod hone . Its the only way to do it quick and accurate |
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Hagen Brothers farms,Goodrich ND | |
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SW Idaho | Start with 1" drill rod. Turn to diameter then taper one end. Set end mill off center and mill 3 or 4 grooves to length. No need to harden drill rod unless you get into some hard steel.
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Dills, FL | are you pressing this bushing into something? It will decrease the bushing bore when you do. be sure to have the bore 'supported' when you press in, BTW 7/8 bushings aren't exactly 7/8 when I have bought them, you have to 'finish to size' that you need. my2cents. |
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enlarging bronze bushings
