Clutch motor

kd0afk · May 18, 2014

I just bought an industrial sewing machine and I'm swapping out the motor. It came with a clutch motor and it's a beast. I'm ordering a servo motor which has variable speed.
Would it be a good thing or a bad thing to use it on my south bend 9" lathe? My old lathe motor took a dump on me.

Wizard69 · May 19, 2014

kd0afk said:
I just bought an industrial sewing machine and I'm swapping out the motor. It came with a clutch motor and it's a beast. I'm ordering a servo motor which has variable speed.
Would it be a good thing or a bad thing to use it on my south bend 9" lathe? My old lathe motor took a dump on me.

More info would help. I would think that you will want at least 3/4 horsepower and really 1 HP would be nice. The clutch may or may not be useful.

Sent from my iPad using Model Engines

kd0afk · May 19, 2014

Here is the data plate.
The motor is on all the time and the clutch engages the pulley. Tom Lipton thinks the instant torque might be harmful.
As far as power, I was using a 1/2hp motor

kd0afk · May 19, 2014

Sorry about that. Forgot pic

kd0afk · May 19, 2014

Also, the rpms can be lowered with a smaller pulley.

MachineTom · May 19, 2014

Is your SB-9 a flat belt machine, that belt is your power limit, small diameter sheaves and a 1" belt. 1/2-3/4 hp. That sewing motor is 3/4 HP but too fast at 3400 rpm. Cheaper to buy a 1/2 single phase motor and slap it on, then make chips. A servo motor and driver, and controls, go buy a bigger lathe instead. While back in the 'old days' machines had clutches because they were line shaft driven, or like a myford had a 1/4 hp motor without enough starting torque to get the machine going. Do you really want to stick your hands into a machine with the motor running, and hope no one ever bumps the clutch lever, not me.

I love all stuff mechanical, but I use my machines to make stuff, not to play dressup. But thats me.

I was in the motorcycle business, and an oft repeated statement was, do we sell Steak or the Sizzle. The Sizzle brings them in the door, and steak is what they leave with.

kd0afk · May 19, 2014

The clutch would be set so that it couldn't be bumped on. The lathe does have a flat belt but it's driven by a motor with a v belt. The pulley on the clutch motor would be swapped out for a smaller one to cut the speed. The only thing I'm worried about is how will the instant start effect the bearings and such.
I can make it safe and this will be a spare motor. I can't afford to buy a lathe motor right now but I have to afford a sewing motor.

kd0afk · May 19, 2014

And it really wouldn't be an instant start, I can feather in the clutch so I get a smoother start.

MachineTom · May 20, 2014

Well as bearings the SB9 has none, it is cast iron ons steel spindle. Run it at top speed awhile and it will lock up, with a squeal. As you will be putting a 3400 motor on, that needs an additional. 2:1 not easy when base speed pulley is about 2.5" you need another counter shaft.
More money, space. Ebay?

kd0afk · May 20, 2014

Could everyone do me a favor and read what I have written before you post?
I WILL CHANGE THE PULLEY OF THE MOTOR TO BRING THE RPMS DOWN TO 1750!!!!!!!!
Not trying to be rude, but this is the third time I've said it.

quickcut · May 20, 2014

I used a clutch motor like that on an optimum lathe. It worked well but was a bit of a fiddle to fit. I liked the mechanism which worked the brake as it stopped the spindle quickly and can be disconnected if required. Sewing machines also now have a servo motor which are very small and variable speed at a very good price. They also come with a belt tension bracket. Great for a drill press.

kd0afk · May 21, 2014

The servo motor will go on the sewing machine.

kd0afk · May 24, 2014

I didnt get the servo motor. I replaced the 3" drive pulley with a 1-3/4" pulley. Runs a lot slower now. I can work with that.
I just ordered a new 1hp motor for the lathe. Woohoo

kd0afk · May 29, 2014

The motor came today. I need to wire it and was going to buy 12/3 but someone said they will give me 15 feet of 10/3 for free.
A lot of people wire their motors with 14ga and it runs fine. Will I loose any power with the heavier wire? I'm an idiot when it comes to electrical.

kd0afk · May 29, 2014

It's a dark red and I'm thinking of painting the lathe to match it. I've already done a rebuild on it, I'd like to give it a good coat of paint. Or it might look nice in Ford grey with a red motor.

danstir · May 29, 2014

A larger wire won't cause a loss of power. In theory only, you could see a slight increase in motor power. Course in this case the increase would be so slight as to be considered zero.

kd0afk · May 29, 2014

The new motor has a reset switch. Do I need this?

Swifty · May 29, 2014

I'm not much on electrical issues, but I thought that a larger gauge wire is better, as a smaller gauge may be prone to heating up due to the amount of current flow.

Paul.

quickcut · May 30, 2014

Is The reset switch for over temperature control. If it is leave it.

kd0afk · May 30, 2014

I don't know. No literature came with it.

Clutch motor

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