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Post by sheltie on Oct 29, 2013 15:54:55 GMT -5
I planned to replace a couple bearing on my saw this afternoon but I've run into a problem. I used an allen wrench to remove the first set (is that the right tool), but the second set of screws are either a different size or are stripped (before I messed with them). If they are stripped, how can I remove them?
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Post by jakesrocks on Oct 29, 2013 16:03:10 GMT -5
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Post by sheltie on Oct 29, 2013 16:13:08 GMT -5
No rust and I tried sizes above and below so off to Home Depot I go tomorrow. Thanks for the tip.
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Post by Peruano on Oct 29, 2013 16:27:38 GMT -5
there are metric and sae allen screws. Some sizes allow interchange with some slop, but when in doubt try both metric and sae wrenches. And of course the T handled ones with the ability to exert force are best in difficult situations. Good luck. Tom
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Post by jakesrocks on Oct 29, 2013 16:28:39 GMT -5
No good tool box should be without a set of easy outs. For broken studs or bolts, just drill a hole in the center and use the right size easy out. It sometimes helps to heat the part around the stuck set screw or bolt. I have a small heat gun made for shrinking heat shrink tubing that I use for this. It provides more heat than a hair dryer, and the small nozzle puts the heat right where it's needed.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Oct 29, 2013 17:29:59 GMT -5
I usually weld in an allen wrench and then twist it out.
100% successful so far. Set screws and allen wrenches are cheap. Time and heartache is not.
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,352
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Post by quartz on Oct 30, 2013 15:57:36 GMT -5
First thing to do is make sure the flats on your wrench are not rounded off, fixed by grinding it back a little. I've dug out many a set screw, and what I've found is they are frequently cracked rather than stripped. Close inspection w/a magnifying glass helps to see this on the smaller screws. Never found an easy out that would work on small screws, as the socket is so shallow. An easy out will expand and tighten a cracked screw. Socket head set screws are made to grade 8 bolt standards, quite hard. Drilling is accomplished with a very sharp drill bit or carbide one if available, turning very slowly, and always wet with a cutting fluid or oil of some type, pipe threading oil or liquid wrench work well, and a good amount of pressure. Short drill bit is best. I've had them drill fairly easily, but generally end up resharpening the bit several times to get a deep enough hole to use an easyout. At times, I've had to progressively drill the screw out to tap drill size, then dig the threads out of the hole. Scott says he has welded a wrench in, and twisted the screw out; never had that luck, as mine have always been flush with, or recessed in a hole. Couldn't weld w/o sticking wrench, screw, and surrounding material all together. If you end up having to drill, get the subject to a drill press if possible, lot easier to hold, and apply necessary pressure to the drill bit. This sort of project has to be approached much like working with rocks, a great deal of patience.
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Post by Donnie's Rocky Treasures on Oct 30, 2013 16:15:14 GMT -5
Not very encouraging & all sounds like Greek to me. I have the same problem except it is the set screw for my groove attachment on my Gryphon. It rusted in there & has been sitting months unused because I can't get it out!!!
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riverbendlapidary
fully equipped rock polisher
Member since September 2006
Posts: 1,058
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Post by riverbendlapidary on Oct 30, 2013 17:12:39 GMT -5
what kind of saw we talking here?
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Post by sheltie on Oct 30, 2013 17:49:19 GMT -5
what kind of saw we talking here? 16" slab saw. It's fixed now - I think. I took the shaft to my local auto repair shop and they removed the two set screws that I was unable to.
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panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
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Post by panamark on Oct 30, 2013 21:28:49 GMT -5
In the future for stuff like this (Donnie too) I think what you will want is an impact wrench (aka impact driver). This is a device (usually air driven) that uses a series of small taps to loosen/unfreeze frozen bolts and screws. It is incredible what they can do sometimes. It is probably what they used. Glad you got it working. It pays to periodically back out, clean, grease, and reinstall such screws.
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,352
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Post by quartz on Oct 30, 2013 22:43:09 GMT -5
I always put a light coat of anti-seize compound on every fastener I use.
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Post by Rockoonz on Oct 31, 2013 0:02:25 GMT -5
In the future for stuff like this (Donnie too) I think what you will want is an impact wrench (aka impact driver). This is a device (usually air driven) that uses a series of small taps to loosen/unfreeze frozen bolts and screws. It is incredible what they can do sometimes. It is probably what they used. Glad you got it working. It pays to periodically back out, clean, grease, and reinstall such screws. Here's the best impact driver for screws and set screws, all you need is a hammer. www.ebay.com/itm/3-8-Impact-Screw-Driver-Reversible-4-Bits-with-Case-/121187737784?pt=Power_Tools&hash=item1c375a20b8Since you push it in as you loosen it, you seldom strip the screws out. With allen setscrews be sure to use a piece of wire or small awl to clean out the socket before attempting to remove. Lee
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Post by 1dave on Nov 4, 2013 18:42:30 GMT -5
Top craftsmen on this site!
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