CBN Wheel for RSBG8 Grinder

[Turner Tim]

Afternoon all,
I've got one of the older style 8" grinders (pre 2018) and I'm about to look to replace the 40mm white wheel and started to think about a CBN replacement. Being realistic, I don't need the new wheel to be 40mm wide, just turning tools being sharpened, but the variety out there in the big world is slightly confusing so I'm just looking for any advice/guidance as to various options for sources to get a suitable wheel from please?

Many thanks
Tim

 

[deema]

May I ask, why do you want to change the white aluminium oxide wheel?

 

[Paul Hannaby]

bear in mind that the spindle length on the RSBG8 grinder is designed for 25mm wheels. The 40mm wheels Record install are dished in the centre so they are only 25mm wide where they attach. IF you get a CBN wheel, make sure the centre boss is configured likewise.

 

[Sideways]

It's not uncommon for cbn wheels to be made with an oversize bore and paired with thick machined flanges to reduce them down to fit different spindle sizes.
I have a 40mm Axminster wheel on a 25/40mm post 2018 RSBG8 grinder and it just fits (but properly).
That wheel and its flanges are wide and it took some hunting to find the grinder to fit it.
The wheel was on sale and came first in my case.

 

[graduate_owner]

I bought an xminster 40mm CBN wheel. I had to buy inserts to match the grinder shaft, about £20 extra, but worth every penny I think. They sharpen my turning tools really quickly with very little heat generated, and I don't need to bother with a shield (just protective glasses) because they can't disintegrate, so it's easier to see what I am doing.

K