Spindle stuck on G0602 Grizzly lathe

[kwoodhands]

The lathe stopped turning even the motor ran fine. I tried to tension the belt. Same problem. Removed the belt could not turn the spindle without great force. Lowered the banjo to release gears. Only the large plastic drive pulley and the small gear were left. Same problem. I think somehow the drive pulley and small gear may be meshed too tight. I see no adjustment . Contacted Grizzly , thought someone here may know what the problem is.

 

[Jasonb]

The two locknuts with notches are used to adjust the bearing preload. Taking them off will also allow the pulley and gear behind it to be removed.

Have you noticed the area around the bearings getting hot before it went tight?

 

[kwoodhands]

The two locknuts with notches are used to adjust the bearing preload. Taking them off will also allow the pulley and gear behind it to be removed.

Have you noticed the area around the bearings getting hot before it went tight?

No I did not notice anything wrong til the lathe stopped turning while I was boring a 1/2" hole.
I will loosen the locknuts to see if the preload is too tight. If that does not help then I will remove the pulley to start with. The lathe was working perfectly with no indication of a problem.
I forgot to mention I heard a noise then shut down immediately. I am wondering if new bearings are in order. Hope not .

 

[Lloyd-ss]

I have the same lathe and had to replace the bearings. Here is the thread. It has some photos, too.:

https://www.homemodelenginemachinist.com/threads/quieting-a-noisey-bench-top-lathe-how.35361/
The bearings were more of a press fit onto the spindle and just loosening the locknuts wasn't enough. After loosening, I had to use a block of wood and a heavy hammer to take the preload off. In the end it worked fine.

Do you regularly use the 2 oiler balls on the top of the head stock housing? The bearings are not shielded, and the inboard bearing especially is wide open to debris getting into it. Regular oiling will flush some of the debris out. The bearings are a standard size and easy to find unless you want to go up one quality class.

It is not a difficult job. Mine was 10 years old and saw maybe 8 hours a week.

Lloyd

 

[Richard Hed]

No I did not notice anything wrong til the lathe stopped turning while I was boring a 1/2" hole.
I will loosen the locknuts to see if the preload is too tight. If that does not help then I will remove the pulley to start with. The lathe was working perfectly with no indication of a problem.
I forgot to mention I heard a noise then shut down immediately. I am wondering if new bearings are in order. Hope not .

How old is that lathe? and how much have you used it?

 

[kwoodhands]

How old is that lathe? and how much have you used it?

At least 20 years old. Probably 2/3 hours each day all week.

 

[Richard Hed]

At least 20 years old. Probably 2/3 hours each day all week.

Then it has seen good work. Would be a different matter if it was only a year old. Have "fun" taking it apart. Certainly sounds like bearings. Let us know how you proceed.