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C-man saw motor bogs down

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Forum topic by al_z posted 01-06-2014 03:46 PM 494 views 0 times favorited 6 replies Add to Favorites Watch
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al_z

8 posts in 290 days


01-06-2014 03:46 PM

Topic tags/keywords: question tablesaw refurbishing

I bought a C-man saw of the 113 vintage. My old 1950s craftsman motor failed and I thought I was upgrading. The saw runs, but bogs down on any cut, especially ripping. Using new Freud 24 ripping blade. checked the fence alignment and it measures parallel to the miter slots and perpendicular to the tabletop.

The motor is a Sears Capacitor Start AC motor model 113.12060; 1.5 listed (3/4 hp?); 3450 rpm. PO added relocated on/off flip switch to left of saw. I put a new link belt on saw and cleaned the pulleys. Check arbor run out and it seems good. Saw is slow to start up, builds to speed, but an inch or two in cut of 2×2 poplar is just slows and stops. Adjusted link belt thinking it might need more tension, but got it so tight that the motor would not spin. backed off a little tension (1/2” deflection) and motor starts. The wiring seems appropriately sized. Plugged into AC outlet and used extension cord. No difference.

I’m not an electrician, so any suggestions on diagnoses or troubleshooting would be greatly appreciated. Would hate to break out checkbook for new saw, but saw + upgrades seems to be near breaking price break point.


6 replies so far

View Harryn's profile

Harryn

20 posts in 1274 days


#1 posted 01-06-2014 04:03 PM

Try cleaning the centrifugal switch, It may be running on the starting winding.

View Tedstor's profile

Tedstor

1369 posts in 1319 days


#2 posted 01-06-2014 04:29 PM

-3/4hp isn’t particularly robust. I had an old 103 series saw, with a 1 hp motor. It had a bit of trouble ripping a 2×4. Ripping 2” poplar might be a task for 3/4hp.

-Is it possible the motor is wired for 220V?

Just shooting from the hip.

View dschlic1's profile

dschlic1

179 posts in 655 days


#3 posted 01-06-2014 06:24 PM

I believe that the 113 series uses 1.5 Hp motors. Not 3/4 Hp. You should purchase a larger motor.

View tefinn's profile

tefinn

1215 posts in 1123 days


#4 posted 01-06-2014 06:51 PM

You have one of three problems.

1)The motor is wired for 220v and you’re using 110v. You’ll need to check the motor plate to see if it is a dual voltage motor, then check to see what voltage its wired for if it is dual voltage.

2)The centrifugal start is dirty or defective. Try blowing out the motor with compresed air.

3)In some cases a bad capacitor will cause this problem. Usually a bad cap will prevent the motor from running at all, but not always.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

View al_z's profile

al_z

8 posts in 290 days


#5 posted 01-06-2014 10:36 PM

Thanks for all the suggestions.

I’m still transitioning from mechanic to woodworker. Thought the motor was like an alternator on a car—torque down belt tight. Wrong! Read instructions for mounting motor and it seems that the bolt in the arched swing needs to be lose enough for the motor to move in unison with saw blade going up or down. Revised belt tension and it seems to be cutting. It will be a few days before I can really test it out, but much improved so far.

Thanks

View toolie's profile

toolie

1768 posts in 1314 days


#6 posted 01-07-2014 02:17 AM

those emerson built TSs are great little tools.

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

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