Preload for HOT headstock on Jet 1014???

[randyrls]

Is there a way to adjust the "preload" on a Jet 1014? Mine works well, no stiffness, roughness, or wobble, but the headstock gets almost too hot to touch after about 30 minutes at top speed.

I have to look at the instruction manual again, but I don't remember reading anything about adjusting the headstock.

Any help or information is appreciated.....

Randy.

 

[jleiwig]

from reading the bearing replacement instructions for the mini I do not believe that there is any preload on the bearings. I would check the bearings and see if there is any lubrication points. If not, I would replace the bearings.

 

[randyrls]

Thanks for the post Justin. I loosened the two set screws on the handwheel, unscrewed the handwheel, and removed the spindle. The bearings appeared to be in good condition, so I applied grease and reassembled. I found a "wavy" washer under the handwheel, so when I re-assembled it I didn't tighten the handwheel as much.
The headstock runs much cooler now. I also checked for any runout and off centric conditions but didn't find any.

 

[jleiwig]

Thanks for the post Justin. I loosened the two set screws on the handwheel, unscrewed the handwheel, and removed the spindle. The bearings appeared to be in good condition, so I applied grease and reassembled. I found a "wavy" washer under the handwheel, so when I re-assembled it I didn't tighten the handwheel as much.
The headstock runs much cooler now. I also checked for any runout and off centric conditions but didn't find any.

Good to know. That wavy washwer is called a bellville washer, and it does supply preload. Have you measured to check if your run out changed or if you have vibration now?

 

[dalemcginnis]

Randy:

I was going to suggest the handwheel rubbing too tightly against the headstock but you already found the problem. Another thing to watch for is if you start to hear a clicking sound check your upper pulley. The set screw tends to come loose on mine and the pulley slides out of position making a clicking noise.

 

[randyrls]

Justin; I checked for runout with my DTI on the inside of the headstock. It read under .001" and is tight with no slop or movement so I believe that is good enough.

Dale; I had a set screw come loose on my metal lathe. I tightened the wood lathe pulley set screw(s), but I should go back and make sure everything is still tight. Thanks for the reminder.

 

[Randy_]

Loctite !!