Interesting day in the City:

Pete Wass

Well-known member
Yesterday I went to my Workshop that my ex-wife owns half of and removed the electric motor from my South Bend Lathe, based on advice I got suggesting that the motor was responsable for my spindle not changing speeds when I swap the belt from one pulley position to another.

This AM I went to the nearby city of Bangor, Maine to handle a number of items on a list I had compiled, one of which was to take the motor to an Electric motor rebuilder to see if it was defective.

My fourth stop was to the Electric motor rebuilder. I walked in the shop which was about the size of 10 phone booths combined with a work bench to the immediate right of the door I walked through. I looked at the voice coming from sort of around the corner and a man who can not be taller than 3'10" came walking over to us; me and the bench.

It was difficult not to "Gape" but I was somewhat conditioned to this by virtue of my haveing watched a few episodes of Little People on TV. I thought, "I 'll bet this is going to be a memorable experience" and engaged with the man.

The motor I brough in is a Craftsman 1/2 reversable motor of 1968 vintage and has been on the lathe since then. He looked at the motor and said, "Old One, ain't it?" Yes I said and told him all about it. He observed the black and red wires hanging out of the conection portal and asked, " what are them wires?". I explained that the power had been connected to them and that the other four wires from the switch had been attached to the bayonet fittings on the connection board.

He said " Huh, it wasn't smokin?" I sez no, the lathe had worked since the late 60's but recently the lathe's spindle speed would not increase by changing pulley sized. he said "Huh". He then said well, let's hook her up and see if she runs. He pulled a set of alligator clips attachesd to wires in a cord, from under the right side of the Workbench.

He said "now, before I do anything I am gonna put these wires in where they belong", which he did. He then showed me where the power should have been fed to. He hooked the motor to the power source and the motor began to spin. I asked him if, somehow, the motor could be running at half speed? he said "No she either goes 1725 RPM's or she will smoke.

After a good two hours of "Chatting " he sent me away so that he could go to McDonalds for lunch. He told me to take er back, bolt her on and see if she runs the way she should. He then said, " Call me when you have her hunnin and we can talk about what's next". He wouldn't take any money and told me he was 74 YOA after he guessed my age as 55 :).

Bottom line is I don't think I got the right advice about the motor being Pooched! So, what else could be wrong with the old girl? All the shafts seem to run free and they is oil in the cups. The spindle has it's locking pin engaged and the Back Gear is not engaged.

Question: What now?

Later in the PM I went to a bread store I had read about in the Downtown section that is run by Monks. I got the last loaf of Dark Rye and asked if he would slice it for me. He replied that they did not have a slicer and smiled. I coudn't resist trying the bread at dinner. MY WORD! the most flavorful bread I have ever eaten, bar none.

So, another interesting day in the life of a retired old Faht.
 
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Your spindle does not change speed when you move the belt from one pulley-set to another. The only way I know that the spindle would not change speeds is if the motor is not running. Start the motor dummy!!

Was your ex a witch? She may have the darn thing jinxed or something!
 
Yeah, if all the smoke gets out, it won't work anymore.
 
Yes

Pete,

Is this with the gear train engaged?

Jim

it's been so long since i have run this machine I don't know if that would make a difference but one would think one would need different spindle speeds with different feed settings, etc, No? I planned to dis-engage the gear trane when I put it back together though.
 
Your spindle does not change speed when you move the belt from one pulley-set to another. The only way I know that the spindle would not change speeds is if the motor is not running. Start the motor dummy!!

Was your ex a witch? She may have the darn thing jinxed or something!



She could be a Witch but she ain't smart enough to do something to screw the lathe up.
 
No matter what speed it is turning, does it have the power to cut anything.
 
Yes,

No matter what speed it is turning, does it have the power to cut anything.



It will cut fine it just doesn't go very fast. When I first bought the lathe it had a 1/3 HP motor on it. It would sag back sometimes when I was using it so I went up to a 1/2 hp motor. A friend who had worked in Machine Shops for years installed the motor and the lathe ran fine from 1969 until a few months ago or I just didn't notice the thing not speeding up.

I noticed the speed not changing when I wanted to polish something and couldn't increase the speed of the spindle. I guess solving the problem by replacing the motor was too much to hope for, eh? probably time for me to consider finding soemthing more modern.
 
Pete

Electric motors of that type are available in a 1725 rpm or 3450 rpm. I suspect that the original motor was a 3450 rpm and the one that you replaced it with might be a 1725 rpm motor. Try replacing the motor with a 3450 rpm unit.

If you need more help, give me a call.

Dick
 
Does the motor sound under load when running doing no work? Does that South Bend have sleeve bearing's, and their running dry, and hot? Put your hand on the bearing cap when running. How hot does it get. Changing the belt position on a cone pully, and getting no speed change on the spindle just does not make sense. With the belt loose on the spindle, how easy does it turn? Does the machine have a clutch drive. I'm not that familar with a South Bend.
 
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I bet they are

I checked that

I have over 30 years of HVAC/REF work under the belt and got burned more than once myself and even more by employees on this.....

How did you "check" belt slippage?

IMO if the belts are over 5 yrs. old and ther is no ideler pulley and your at max adjustment on the motor base, put on new belts.......

I lost one account (17 stores) due to this, a Rooftop AC didn't seem to be cooling the area below it as it should. The Service Tech put his hand in the out put air and "thought" it wasplenty, put the low side gauge on the system and that showed low Ref. level. He added Ref. until the compressor stopped, told the customer the "can" was bad and said he'd have me call. The store Manager called another HVAC guy and he got 8 lbs. of my gas and the account because the belt was lose, he rubs it in every time he sees me.
 
Pete, you got monks?

Later in the PM I went to a bread store I had read about in the Downtown section that is run by Monks. I got the last loaf of Dark Rye and asked if he would slice it for me. He replied that they did not have a slicer and smiled. I coudn't resist trying the bread at dinner. MY WORD! the most flavorful bread I have ever eaten, bar none.

So, another interesting day in the life of a retired old Faht.

What kind are they? I would buy some to bake and do the cooking. Who owns them? Do they take up much room or eat anything other than bananas?:D

Rooah
 
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