- Joined
- May 7, 2023
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- 1,451
I have experience with the 6900 series. Have not noticed any wear to the bed. BUT, the bed will sag over the years! And IMHO doing any work to the saddle will not correct a taper cut. The saddle will just ride/follow the sag and cut a taper. You will need to re-grind the bed. And then probably lose the flame harden properties. Maybe best to leave it alone and live with it and have a file and emery paper handy if needed for the taper removal LOL. Get a high-resolution level and take readings up and down the bed on the non-wear surfaces. This should indicate a sag if any...Good Luck
It’s not sag, it is wear. The ways get a belly worn into them over time.
My 13-36 has visually noticeable wean and works fine for short parts, but grinding the bed is on the list for some rainy day.
As to the flame hardening, if it’s not a production machine it likely will not matter.