Craftsman 115-6962 electric motor

[tlodigensky]

Hello, I restored a craftsman 115 6962 electric motor for my Atlas Drill Press. New bearings, replaced damaged wiring, and a new capacitor. I finished it off with a media blast and a brand new paint job. I even bought a replica craftsman nameplate with all the specs on it from one of the guys on the Journal. I have checked rechecked and triple checked everything and this motor doesn’t run right. It’s not starting correctly. I can hold the shaft with my bare hand and the motor will just hum until the GFI blows. If I let it go to run up to speed it’s got all the torque in the world. I should also add that occasionally it starts up in reverse. Others feel it might be the capacitor and the original flat style was 24–155 MF 110/125 VAC. The closest thing I could find is 130–1 56MF 110/125 VAC. I’ve done the same thing with other motors and never had a problem so I’m wondering if I’ve got a failure somewhere in the stater? Anything you guys could suggest would be much appreciated. I’ve got a ton of work in this motor and I’d hate to see it Go to waste. Thanks in advance fellas.

 

[micromind]

If it's single voltage, there are 2 windings, start and run.

Since it is good when uo to speed, the run winding is ok.

Since it won't start properly, it's something in the start circuit. This circuit consists of the start winding, the start capacitor and the centrifugal switch.

Most likely the start winding is ok and the capacitor is likely ok also. That leaves the centrifugal switch. Very likely it is not engaging when the motor is stopped. After it is up to speed and de-energized, do you hear a click when it slows to about half speed? If not, the switch might not be closing in. This is very common with older motors.

 

[Model A Fan]

Do you have a link to the capacitor you used? I'm running into a similar problem (motor mounted on drill press, has belts and tension, won't turn fast enough to get going, trips breaker after a bit of slow speed turning).

I'm assuming it is the switch inside or the capacitor. I'm trying to sell this drill press, so I'm not wanting a complete restoration on my hands, but want to fix the motor to make it worth more.

 

[tlodigensky]

I got mine sorted out and it’s running like a champ. The replacement capacitor appears to be correct, but it is mounted externally so you’ll need a housing. Fortunately, I had one laying around which is a good thing because the guys are on eBay wants stupid money for a capacitor cover. I’m attaching a couple of photos. The first one will be of the start capacitor that I used for the 115 6962. You can get it on Amazon. The second photo is how I mounted it to my motor. Good luck.