Turntable bearing question

[dod996]

I am considering making a few Teres style bearings from 360 brass and 440c stainless steel that has been heat treated to a very high hardness.
Would this be a good material selection? Does anyone know what the original
parts were made from?

Thanks

Tony

[dod996]

Ok, I can't seem to find out what the original Teres bearing was made of. I'm reluctant to use 304 stainless because it will guald and seize so easily. I'm going to run 10 spindles from 440 stainless and have them heat treated. After heat treating I'm going to hard turn the ball bearing bore then grind the spindle all over so everything will be concentric within .0001.

Tony

[Nanook]

let me know what you would consider a sa selling price. PM me

[hungalpha]

Originally Posted by dod996

Ok, I can't seem to find out what the original Teres bearing was made of. I'm reluctant to use 304 stainless because it will guald and seize so easily. I'm going to run 10 spindles from 440 stainless and have them heat treated. After heat treating I'm going to hard turn the ball bearing bore then grind the spindle all over so everything will be concentric within .0001.

Tony

I don't think it's necessary to heat treatment for the spindle but if you can do, it's great. What you gonna do with the housing? will you use only oil bath or additional bushing?

[dod996]

I will make it like the original from brass using an oil bath.

[dod996]

Also heat treatment will allow the spindle to hold a better finish for the life of the bearing.

[rkernell]

Tony,

I am learning to machine and I am quite interested in your processes. Would you be willing to communicate via emails so I can ask questions that will not monopolize the forum?

Rick Kernell

[dod996]

I Just finished these bearings. I used 440 stainless steal heat treated to Rocwell 60 C then ground the diameter and ball bearing bore.


BEARING-1.jpg

[woodturner-fran]

Very impressive!!

Some things to consider:
1. What have you used for a thrust plate?
2. How does it feel when fitting together?
3. Teres takes a few hours for the spindle to settle on the thrust plate due to oil seeping up. Might be worth doing a test on that for your own info. Add a weight on top to help coax it down.


Well done - I've seen so many attempts to do exactly this but none as determined and complete as this.

I'm sure many would be interested in taking one off your hands. What kind of price would you want if you decide to sell some?


Fran

[dod996]

1. I’m using black Delrin for the thrust plate
2. It feels very smooth when fitted
3. If you apply some oil to the surface you can push them together. It does take a while for the air to escape but there no chance of the spindle seizing like 304 S.S. because it is hardened.

I did make a few extras. Would 250.00 be a fair price?