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Forum topic by CudaDude posted 01-31-2013 03:29 AM 801 views 0 times favorited 20 replies Add to Favorites Watch
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CudaDude

122 posts in 1052 days


01-31-2013 03:29 AM

one of the tilt stops on the front bracket of my unisaw is broke off. Do you recommend welding it back? A new bracket is $300+.

Also I found the end of the gear broke off which I guess serves as a stop for raising the blade. Do you see any problem just leaving as is and being aware of the blade height?

One more question. Would either one of these or both cause somewhat of a jump upon startup?

-- Gary


20 replies so far

View MonteCristo's profile

MonteCristo

2098 posts in 932 days


#1 posted 01-31-2013 04:23 AM

If you have the height and tilt wheels locked, there should be no reaction on startup, or while running for that matter. This saw must have received some pretty rough use. I have never heard of this sort of damage under normal use.

If it’s just stops that are broken, I would leave them be and use common sense to save yourself some serious coin.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

View toolie's profile

toolie

1773 posts in 1372 days


#2 posted 01-31-2013 01:37 PM

tilt stops are, IMHO, irrelevant. my former unisaw had one broken off, but since i never use them, it didn’t matter. i wouldn’t be concerned about the elevation issue. neither of those items would cause the motor to jump on start up. my 3hp baldor motored ‘73 unisaw never jumped, and start up was instantaneous.

-- there's a solution to every problem.......you just have to be willing to find it.

View Cosmicsniper's profile

Cosmicsniper

2199 posts in 1902 days


#3 posted 01-31-2013 01:51 PM

Shouldn’t make much difference. Just get a Wixey digital for tilt adjustments and keep blade height below 3”. Even so, everybody has a friend with a welder, right? :)

-- jay, www.allaboutastro.com

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CudaDude

122 posts in 1052 days


#4 posted 01-31-2013 02:50 PM

About the “jump” on start up. It is almost non-existent without a blade on the saw. Put a blade on there and that’s when I notice it. Normal?

Glad to hear I’m not going to have to drop $300-500 for parts. Now i can get a fence and start butchering some wood.

-- Gary

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SamuraiSaw

489 posts in 708 days


#5 posted 01-31-2013 03:03 PM

I’d be more concerned about the height stop, I presume raising it too high might cause problems with arbor hitting the table. I don’t use the tilt stops, instead I use a Wixey cube.

Double check the arbor bearings and belt. There will be some jump at start-up, but it shouldn’t be real noticable.

-- Artisan Woodworks of Texas.... www.awwtx.com

View CudaDude's profile

CudaDude

122 posts in 1052 days


#6 posted 01-31-2013 03:11 PM

The arbor has no play it that i can feel. But it does seem a little noisy when i free spin it by hand.

Is it safe to start it with a blade on it without the table top? So i can have a better view of what’s going on in there.

-- Gary

View PurpLev's profile

PurpLev

8476 posts in 2392 days


#7 posted 01-31-2013 03:22 PM

you can braze those back on, or just drill, tap, and bolt on a stud as a replacement to act as the stop(s) – more so for the height stop than the tilt stop which really is never all that accurate that I would count on it anyways.

RE the jump:
did you try turning it on without the belt on?

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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CudaDude

122 posts in 1052 days


#8 posted 01-31-2013 03:26 PM

PurpLev, yes I started without the belts. Smooth and quiet. Like I said, it almost not noticeable without the blade.

-- Gary

View SamuraiSaw's profile

SamuraiSaw

489 posts in 708 days


#9 posted 01-31-2013 03:28 PM

”Is it safe to start it with a blade on it without the table top? So i can have a better view of what’s going on in there.”

Honestly don’t have a clue on that question. Since you’ve got the chance, go ahead and replace the arbor bearings. They are not that expensive and you’ll be assured they will last as long as you own the saw.

-- Artisan Woodworks of Texas.... www.awwtx.com

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PurpLev

8476 posts in 2392 days


#10 posted 01-31-2013 03:38 PM

Gary, “without a blade” and “without a belt” are 2 different things.

my point is – it is very possible (highly likely) that the BELT and not the blade/arbor is what is causing your jump. esp. if this is an older saw using an older generation belt that could produce “memory bumps”.

As a next step, I would recommend replacing the belt with with an equivalent belt to suit your saw (size), or use one of those link belts (though they are more expensive than any good gator belt) and see if that clears your bump.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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CudaDude

122 posts in 1052 days


#11 posted 01-31-2013 05:53 PM

The belts are new, although they’re Gates belt that I got from the parts house. The Gates part# I found on the internet was a 2260 which seems a little long. The motor is adjusted about as far down as it can go with these belts. but I don’t think belts are the problem because there was no change in performance of the saw between the old and new belts.

-- Gary

View toolie's profile

toolie

1773 posts in 1372 days


#12 posted 01-31-2013 06:44 PM

Is it safe to start it with a blade on it without the table top? So i can have a better view of what’s going on in there.

yes, i did it several times when rehabbing a unisaw. just be careful about spinning saw blades and no guards.

regarding the motor jumping, are you tightening down the lock bolt after the weight of the motor tensions the belts? check out this video at the 2:27 mark where the motor is secured.

http://www.youtube.com/watch?v=aVDihfPsuaI&feature=relmfu

i have a hard time thinking of a way the motor could move once that lock bolt is secured.

-- there's a solution to every problem.......you just have to be willing to find it.

View MonteCristo's profile

MonteCristo

2098 posts in 932 days


#13 posted 01-31-2013 07:52 PM

CudaDude With higher voltage machines, there is a sense of a “jump” on startup, although in actuality the jump must be minuscule. You should check out the bigger TS that run on 440V 3 phase. Startup is impressive – fast, despite a blade that weighs 5 pounds or more !

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

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CudaDude

122 posts in 1052 days


#14 posted 02-01-2013 12:04 AM

toolie, it’s not just the motor it’s the whole saw. But doing a google search it seems as this is a pretty common thing for unisaws. Usually described as a bump or bang at startup. Still going to investigate some more while the table is off.

As usual, thanks everyone for the input.

-- Gary

View mandatory66's profile

mandatory66

98 posts in 874 days


#15 posted 02-01-2013 03:43 AM

I decided to do some cleaning & maintenance on my Unisaw which is 7 years old. I cleaned the gears & trunions vacumed every thing and decided to tighten the belts. when I started the saw, it started with a bang that did not exist prior to the maint. work. Could not imagine what I did. I checked the belts and they were tight. After 5-8 startups I decided to loosen the belts and just let the motor weight make them tight. The Bang was gone. I would be looking at belt tension in your saw.

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