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Re: Mini lathe DC motor longevity

 

When using my lathe I switched the belt to low speed this make the motor run faster . My temperature gauge tells that never gets very hot.

WhatI I am thinking if use lathe motor at higher speed cuts will increase the life of motor.
I just read where someone had motor problems and found carbon dust inside.

{If look a Bridport mill power feed. The motor brushes are at bottom if ever took part you find carbon dust on cover plate. Motors used swing machines the dust blown out.}
Now when look mini lathe motor running very low speed the fan is not blowing enough to clear this dust out. So collects in bad places and takes out the motor.
It is only guess at point but looks what problem The solution is change the belt speed.

Dave


On Sun, Jul 14, 2024 at 02:12 PM, John Mattis wrote:
The speed depends on the material and the diameter.?
I have turned a piece of 3 inch diameter stainless down to make a ER 32 collet chuck.?
I don’t take budget cuts.?
On a recent part I took 0.040 from the diameter on a piece of 1 inch diameter steel.?
John?

On Sun, Jul 14, 2024 at 2:05?PM davesmith1800 via <davesmith1=sbcglobal.net@groups.io> wrote:
That is great news.
I have been reading a lot motors troubles on mini lathe.
I could be speed the min lathe runs at is the different.

Do you due most work on higher motor speed?

Dave

On Sun, Jul 14, 2024 at 11:36 AM, John Mattis wrote:
I got my Speedway mini lathe in June of 2002 and have used it extensively with no motor problems.
I did have to have the control box repaired about three?years ago.
John

On Sun, Jul 14, 2024 at 9:37?AM davesmith1800 via <davesmith1=sbcglobal.net@groups.io> wrote:
I was looking internet on longevity of dc motors and founds you may like read.
The first is the most common motors for mini lathes.
The second link is on industrial DC motor they very expensive for mini lathes.
If read it said same busily thing I did on my last post
Mini lathe burshes latest 1,000 to 3,000 and industrial motor 7,5000 hours.
But some may like reading.

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