Changing the bearing on the mill

[willio]

So it looks like my bearing were a bit to tight from the factory and i managed to liquify all the grease. So its time to change them out.

Ive got the whole thing apart but I cant figure out how on earth to get the spindle out of the housing.

Any one ever change out the mill bearings???


Thanks

Will

[smallblock]

If you have the quill out of the head casting, you can press the spindle out the bottom. After you remove the 2 spanner nuts and lock tab, support the quill with a piece of pipe about the same diameter- then just press the shaft out- be careful you don't hook the race of the lower bearing on you support pipe or it will pull it apart and ruin it. Once the spindle is out, the lower bearing can be cleaned and inspected for any damage- if it looks ok, it can be re-packed in place with a good moly grease. The top bearing will come free and it can be cleaned, inspected and repacked or replaced. The bearing numbers are listed on the Shoptask website
www.shopmasterusa.com under the " common parts" tab.

[willio]

My spindle overheated and it has no interest in coming out. I have banged on it and begged for mercy but its not budging. So either I am doing something wrong or its really stuck, also there is not one drop of grease left in the bearings, it totally liquified and dripped out.

So now what. Should I stick the whole thing in a 250 degree oven and try to bang it out again? Should i just destroy the old bearings? Man this really stinks. My machine has less than 50 minutes on it. (Thats right MINUTES)

[Bloy2004]

My spindle overheated and it has no interest in coming out. I have banged on it and begged for mercy but its not budging. So either I am doing something wrong or its really stuck, also there is not one drop of grease left in the bearings, it totally liquified and dripped out.

So now what. Should I stick the whole thing in a 250 degree oven and try to bang it out again? Should i just destroy the old bearings? Man this really stinks. My machine has less than 50 minutes on it. (Thats right MINUTES)

What model of machine is this? ....an older one that you got used?
If it is new as you imply above, then call JT and prepare to have it fixed under warranty.
Have you modified the machine in any way prior to this "burnout"? Abnormal speed increases or such?
Otherwise,
You my actually need to find a good "press" to separate the parts with some heat applied to the proper parts(castings or races) to expand the frozen parts enough to release.
This site: http://www.the-alchemist.com/ may have some hints on how to get it apart.
Or this site: http://members.cox.net/tangoromeo/index.shtml --which may be a little more in-depth.
see page 4: If you got this far ...He says:
"This page marks the beginning of my unorthodox approach to bearing/spindle removal. I developed this sequence solely for those of you that may be lacking in resources to press bearings on and off or don't wish to bash your spindle repeatedly with a hammer ... hard. Please note that although my attempt was successful, there is some risk involved in this procedure in terms of damaging part of your machine. For a more traditional method, please go (coming Feb. 2), contact the manufacturer for assistance, or take the spindle/sleeve assembly to a qualified machine shop to have the bearings pressed on and off for you. Unless they are jerks, they should do it for a few bucks. "

Good luck!

[digitalmdj]

How old is your machine and which model is it? You can forget about JT fixing it he doesn't know anything. He will expect you to do it and save him some money. It sounds like a new machine so good luck with the rest of the machine.

[smallblock]

What model of machine is this? ....an older one that you got used?
If it is new as you imply above, then call JT and prepare to have it fixed under warranty.
Have you modified the machine in any way prior to this "burnout"? Abnormal speed increases or such?
Otherwise,
You my actually need to find a good "press" to separate the parts with some heat applied to the proper parts(castings or races) to expand the frozen parts enough to release.
This site: http://www.the-alchemist.com/ may have some hints on how to get it apart.
Or this site: http://members.cox.net/tangoromeo/index.shtml --which may be a little more in-depth.
see page 4: If you got this far ...He says:
"This page marks the beginning of my unorthodox approach to bearing/spindle removal. I developed this sequence solely for those of you that may be lacking in resources to press bearings on and off or don't wish to bash your spindle repeatedly with a hammer ... hard. Please note that although my attempt was successful, there is some risk involved in this procedure in terms of damaging part of your machine. For a more traditional method, please go (coming Feb. 2), contact the manufacturer for assistance, or take the spindle/sleeve assembly to a qualified machine shop to have the bearings pressed on and off for you. Unless they are jerks, they should do it for a few bucks. "

Good luck!

On my first 17 20 machine, I had a bearing go out after a couple of years. I made the mistake of hooking the cage on my support when pressing the bearing out and pulled it all apart. I shipped both bearings back to shoptask and they warrantied them for me even though I ruined one. JT said that he could see the failure on the rollers. If you don't have a press, maybe just ship the whole quill assembly back and ask him to install new bearings for you.

[flatheadford49]

My spindle overheated and it has no interest in coming out. I have banged on it and begged for mercy but its not budging. So either I am doing something wrong or its really stuck, also there is not one drop of grease left in the bearings, it totally liquified and dripped out.

So now what. Should I stick the whole thing in a 250 degree oven and try to bang it out again? Should i just destroy the old bearings? Man this really stinks. My machine has less than 50 minutes on it. (Thats right MINUTES)

Hey Willio,
Did you ever get the bearings replaced for your milling spindle. While your at it, you should pull the lathe spindle, check the bearings, regrease, and adjust.

Are you making chips yet? Wait till you put that piece of work in the vise and the cutter starts throwing hot chips all over the shop and down your shirt.
That's what it's all about and makes it all worthwhile.

Good Luck
Flathead