Spindle bearings

[Chuck K]

I'm replacing the spindle bearings in a model 40 Index mill. I have the bearings out.
I've never dealt with angular contact bearings. When I removed them, the sides that say "thrust here" were facing each other. I'm assuming that there is a right and wrong way to assemble these. I learned long ago not to just put things back together the way they came apart. It's obvious I'm not the first one to take the spindle apart. The bearings don't seem bad but they make a lot of noise. I thought it was possible that it was just assembled wrong. Any bearing specialists that can enlighten me? Thanks, Chuck

 

[Liljoebrshooter]

They can be assembled in different directions. It depends on how the whole assembly is designed.
Do a little research on AC bearing assembly. I did my mill last year and they turned out ok.
Be prepared for a shocker when you see prices of bearings.
Joe

 

[Liljoebrshooter]

Just a quick look for a 107 bearing.
Joe

 

[Chuck K]

I'm replacing the spindle bearings in a model 40 Index mill. I have the bearings out.View attachment 314513
I've never dealt with angular contact bearings. When I removed them, the sides that say "thrust here" were facing each other. I'm assuming that there is a right and wrong way to assemble these. I learned long ago not to just put things back together the way they came apart. It's obvious I'm not the first one to take the spindle apart. The bearings don't seem bad but they make a lot of noise. I thought it was possible that it was just assembled wrong. Any bearing specialists that can enlighten me? Thanks, Chuck

The two bearings are on the bottom. One bearing on top.

 

[Chuck K]

Just a quick look for a 107 bearing.
Joe
View attachment 314522

Thanks
l'll research it this afternoon. I just ordered all three bearings on Ebay. Less than 80 bucks for the 3 bearings.