miter saw blade wobble - Woodworking Talk - Woodworkers Forum

 
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post #1 of 6 Old 02-11-2010, 09:34 PM Thread Starter
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miter saw blade wobble

i have a dewalt 12" dw705 miter saw that has picked up some blade wobble as it spins. it is actually visible - it will run smooth, then wobble, then smooth, etc.. it is not the blade, as any blade i install does the same thing. just wondering if anyone else has had this problem before i dig in. elsewhere i read about possible blade washers being the problem?!?
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post #2 of 6 Old 02-11-2010, 09:53 PM
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Not the blade heh?

Three possible issues: bad blade, loose blade or washers, bad arbor bearings. That fact that is comes and goes is interesting. Does it produce a kerf that's wider a than usual? Or does it settle down in use? Interesting issue! I'm thinkin' the arbor is worn or loose if it's a belt drive. bill

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post #3 of 6 Old 02-11-2010, 10:28 PM
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Quote:
Originally Posted by woodnthings View Post
Three possible issues: bad blade, loose blade or washers, bad arbor bearings. That fact that is comes and goes is interesting. Does it produce a kerf that's wider a than usual? Or does it settle down in use? Interesting issue! I'm thinkin' the arbor is worn or loose if it's a belt drive. bill

TimPa I was going to post what I was thinking your problem was. But Woodnthings took my thoughts. I agree 100%. That Woodnthings guy is a smart guy. Handy

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post #4 of 6 Old 02-12-2010, 09:43 AM Thread Starter
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all blades i install do the same thing. kerf is wider (blade is wobbling). it doesn't settle, at least after waiting 5-10 seconds or so. direct drive. anyone else have this problem?
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post #5 of 6 Old 02-12-2010, 12:02 PM
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Loose Bearings??

Can you detect any unusual bearing noise when the saw is running? Take the blade off and check for any loosness in the arbor/shaft. I would hate to think it could be bad bearings at the end of the motor.

I have the same Dewalt 12" miter saw. So far, no problems, but I'll be sure to check for that when I get out to the shop.

I know a blade wobble can be irritating. A friend of mine has a slight bend/warp or twist in the arbor on his table saw - just enough cause some minor blade wobble and really pi$$ him off. But he's too cheap to buy a real saw so he compensates for the slightly larger kerf (and probably sands more saw marks).
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post #6 of 6 Old 02-12-2010, 12:39 PM Thread Starter
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just got done re-assembling it. another site mentioned the blade washers if you encounter a big blade jam, there are 3 there together around the blade. i vaquely remember a jam i had with it a couple of building seasons ago. erplacementparts.com has nice part breakdowns for these saws. there is a single gear reduction box on the output of the motor. i tore down and lubed. seems to have made an nice improvement, but not gone. half-a$$ed tried prying the two bearings off but they didn't budge. may just buy the assy and washer pkg.
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