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Table saw motor bogs down when set to 45 degrees...any ideas?

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Forum topic by camps764 posted 03-04-2014 12:48 PM 758 views 0 times favorited 18 replies Add to Favorites Watch
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camps764

794 posts in 1011 days


03-04-2014 12:48 PM

Have a craftsman table saw that I purchased used. Really like the saw overall but have noticed something strange.

When I tilt the blade to 45 I lose a lot of cutting power. My previous craftsman never had this problem. In fact, this saw is supposed to be more powerful than the previous C-man. It has a link belt on it if that makes a difference.

Not sure if the belt is the wrong length or if there might be something else – probably really simple – going on here to cause this.

In all honesty I hardly ever set the blade to an angle, so it’s not a huge issue. However, I am going to sprucing up the shop with some french cleats, so I’ll need to do a little angled work.

Anyone have any ideas why in the world it would be doing this?

-- Steve. Visit my website http://www.campbellwoodworking.com


18 replies so far

View ScottStewart's profile

ScottStewart

109 posts in 783 days


#1 posted 03-04-2014 01:02 PM

On my craftsman, the belt tension would change at different angles, so I wonder if your belt is slipping. What type of saw is this?

View bigblockyeti's profile

bigblockyeti

1538 posts in 371 days


#2 posted 03-04-2014 01:40 PM

I would check the blade alignment relative to the fence when the blade is at 90 degrees and again at 45 degrees to see if something is changing. If the blade is no longer aligned to the fence when tilted, then you have the possibility of binding which is not only very dangerous but will reduce the perceived power of the saw. Do you have any pictures of the blade that you could share, particularly the fence side of the blade? If binding has occurred it’s likely the workpiece will have contacted the plate of the blade and left the associated marks. The belt tension is another possibility which seems less likely, but certainly not impossible.

View DeLayne Peck's profile

DeLayne Peck

345 posts in 852 days


#3 posted 03-04-2014 04:09 PM

I have a Delta Contractor, vintage 1986. I bought a linked belt for it. Might quiet it down and transfer power more effectively. Some V-belt get worn and polished. Believe it help my old geezer.

-- DJ Peck, Lincoln Nebraska. I think of my shop as Fritter City. I am the Mayor.

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MalcolmLaurel

210 posts in 274 days


#4 posted 03-04-2014 04:10 PM

My RAS does the same thing.

-- Malcolm Laurel - http://MalcolmLaurel.com https://www.etsy.com/shop/MalcolmLaurel

View bandit571's profile

bandit571

6950 posts in 1334 days


#5 posted 03-04-2014 04:17 PM

When you tilt it to 45*, it changes how MUCH weight the motor is placing on the belt . Might get a bit on the loose side, enough that the blade will slow down.

If it is the motor itself bogging down, then it might be a bearing issue inside the motor…

-- A Planer? I'M the planer, this is what I use

View Rick M.'s profile

Rick M.

3942 posts in 1031 days


#6 posted 03-04-2014 04:29 PM

I believe link belts stretch a bit after breaking in (mine did), remove 2 links and see if it helps.

-- |Statistics show that 100% of people bitten by a snake were close to it.|

View camps764's profile

camps764

794 posts in 1011 days


#7 posted 03-04-2014 04:56 PM

Thanks all!

Scott – It’s a Craftsman contractor series – the one they labeled as “3hp”. It’s not really 3 hp, but it was a nice marketing touch :)

BigBlock – you might be right on the binding issue. I haven’t calibrated my saw in a while and need to put the PALS on soon and get it squared up.

DJ – I put a linked on it for those exact reasons. It helped on the previous model CMan I had…figured it would help here. You and Rick might be on the right path with the stretching issue.

Bandit – I didn’t even think about the weight changing…might be enough tension when its hanging off the back at 90, but not enough when its hang sideways in the air.

I’ll pull 2 links out this evening and see what happens. I’ll also make note of any binding that could be occurring. Will follow up with everyone when I’ve chased all of these things down.

If anyone has any other ideas please feel free to chime in.

-- Steve. Visit my website http://www.campbellwoodworking.com

View ScottStewart's profile

ScottStewart

109 posts in 783 days


#8 posted 03-04-2014 04:59 PM

I think Bandit is right, that’s what happened with mine as well.

View oldnovice's profile

oldnovice

3759 posts in 2019 days


#9 posted 03-04-2014 05:18 PM

When you cut tilted 45° you are actually cutting 1.4 times whatever thickness you are running through the blade.

1.414 X 3/4” = 1.060”, 1.414 X 1” = 1.414” etc. And, an unclean blade exacerbates the problem!

However, I don’t know if that’s all of your problem.

-- "I never met a board I didn't like!"

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camps764

794 posts in 1011 days


#10 posted 03-04-2014 09:58 PM

Oldnovice – Great insight as well….My blade wasn’t brand new at the time, so that probably didn’t help the problem either.

-- Steve. Visit my website http://www.campbellwoodworking.com

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oldnovice

3759 posts in 2019 days


#11 posted 03-05-2014 12:34 AM

I probably have the same or similar Craftsman TS.

Another problem with my model is that the tilt is connected to the sheet metal side which flexes to some extent even though there are two stiffening ribs welded to the side. I saw one solution to they flexing problem by adding wood panels screwed to the sheet metal. I haven’t done that on my saw as I rarely tilt my blade because getting it back to normal is a bother!

-- "I never met a board I didn't like!"

View Loren's profile

Loren

7539 posts in 2299 days


#12 posted 03-05-2014 12:40 AM

View toolie's profile

toolie

1759 posts in 1279 days


#13 posted 03-05-2014 02:06 AM

Switch to a more aggressive blade with a lower tooth count and a more aggressive hook angle. I had that same problem when raising panels on my c-man 113 series TS. Switching from a 40T combo blade toa 24T rip blade so
Loved the problem.

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

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camps764

794 posts in 1011 days


#14 posted 04-22-2014 02:06 PM

Quick update, shortened the link belt and cleaned the blade. Seemed like it helped a little, but still had to push through pretty slowly.

Planning to re-square the blade to the miter slots to see if that helps the problem at all.

-- Steve. Visit my website http://www.campbellwoodworking.com

View neverenougftackle's profile

neverenougftackle

186 posts in 497 days


#15 posted 04-22-2014 03:40 PM

I too have one of those 3hp Cman saws, mine is some where in the early 70’s. Some time back bought a balanced set of pulleys ,and link belt set-up at the woodworking show. That helped some, then that motor gave out. Here in town I have a couple of large electrical motor sellers and re builders, and they suggested a new more powerfully motor, rather than have mine re done. Now Steve, that made a night and day difference in the cutting of any blade mounted in that saw, big time. Huge difference !!!! Could be your motor is giving out also.

Oh almost forgot,,,, stay with the thin kerf blades on your saw.

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