Heating up a Bearing for Install

[Shawn]

What is the best methood for heating the bearing up to install it on a shaft? I assume using the oven and set it for what...? 400 degrees? And let it bake for how long...15-20 minutes? What about the shaft? Freeze it for..a day?

I mess up a bearing in the D300 and I have had to take it apart again...so I would rather not have to do it again....

input?

 

[Caleb]

when I had to install a pressed fit bearing for my doubler I used a propane (I think) torch and froze the other part for a couple hours, It didn't take much heat at all...I was surprised at how little in fact. FWIW

 

[I Lean]

The last one I heated that way (and it's been a loooong time) was not too hot, I'm thinking more in the 250 degree range. 20 minutes or so, long enough to get the bearing nice and evenly heated. The other part (a carrier) was room temp. The only real "trick" is to get that bearing seated quick, because the heat transfer between the parts will make the bearing solid on there in no time.

 

[great scott]

I have used dry ice to cool a shaft befor, works great.

 

[BCGPER]

I do 350 for 20 to 30 minutes. Use carb or brake cleaner fist, to get the oil off the bearing, unless you like sleeping in the garage.

Freezing is a big help, but either way you have to work fast. You only get one shot.

If you're worried, I've got a hydraulic press.

 

[Shawn]

Yep. I did 350 for about 25 min and through the shaft in the freezer for about the same amount of time. It worked well.

 

[DCZ]

Lay the bearing on an incandescent light bulb while you prepare the shaft for the bearing installation. Chances are good you have one right there in the shop. Leave the bearing on the bulb as long as you want - it won't get too hot and is ready whenever you are. Works great and keeps the mess out of the house!

Rick