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JET Lathe - Bearing Replacement - DISCONNECT AC POWER

M

Michael Ogden

Joined
Apr 18, 2018
Messages
24
Likes
15
Location
Gatesville, TX
I was in the process of changing the bearings on my 1221. Easy Peasy since I'd done it before. Obviously the lathe was turned OFF. Unplugged? Nah. I'm not messing with the electrical stuff. Right?

WRONG!!! As I was sliding the pully from the shaft, the key that keeps the pully from turning on the shaft fell onto the speed sensor fell onto the speed sensor.

A pop and a few sparks later, I have a fried speed sensor and a dead lathe.

This just happened, so I haven't determined the full extent of the damage. I will update this post as I assess things.

I've been thinking about getting a bigger lathe. I just hope this isn't the trigger. This little 1221 has been an absolute jewel for my purposes.

Cheers!
 
B

Brian Gustin

Joined
Feb 28, 2021
Messages
1,226
Likes
1,076
Location
Roulette, PA
Website
www.reallyruralwoodworks.com
I learned very early to ALWAYS unplug or disconnect machine/equipment from its power source/battery when it is being serviced (other than simple cosmetic stuff.)

I have had lots of little "unexpected, but preventable" mishaps - usually to self, sometimes to machine, sometimes to tools. I've had gas engines give a sudden "burp" when rolling it over (and busted a flywheel fin and bent screwdriver) because I didn't unhook spark plug before servicing the recoil starter... I've had cars & tractors both give me nasty burns and shocks because I didn't unhook the battery properly and touched some bare spot to cause a short to ground... I have had residual shocks on power tools (and a nasty short that ruined my wire cutters) because I didn't physically unplug and just assumed that flipping the breaker was enough... (But electronics can still hold considerable electrical charges in capacitors and the like, even if unplugged!)

Good luck on getting your machine repaired and hopefully you have better luck than I usually do, and don't have to spend half again as much as a new machine to get it fixed..
 
M

Michael Ogden

Joined
Apr 18, 2018
Messages
24
Likes
15
Location
Gatesville, TX
Brian Gustin said:
Good luck on getting your machine repaired and hopefully you have better luck than I usually do, and don't have to spend half again as much as a new machine to get it fixed..
Click to expand...
It looks like a new JET 1221 runs about $1000.

I had to replace the circuit (control) board, the motor speed sensor, the headstock speed sensor, and the speed pot. My little 1221 and I are back in business.

As for cost, I snuck in for just under $500. While waiting for parts I developed a bad case of New Lathe Fever.

Cheers!
 
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