What is the size of the grinder shart?
If less than 3/4 inch, then locate a collet of that size.
Get a good quality bolt of the same size, inches long, so you have a good, not threaded length.
Fine thread.
A few close fit washers, if these can not be found, get the next smaller size and drill to size, and nut to fit.
A couple extra nuts.
A couple brazed carbide bits.
Cut off the head of the bolt.
Center mark your disks.
Drill to just fit the bolt, confirm it fits grinder.
Also, some grinders may have a threaded backer on the motor side of the wheel. If so, you can thread your disk. The bolt must have the same thread.
Insert bolt in collet with threads sticking out lonk enough for a washer and nut.
Place bit in side of vise and make the nuts small diameter, reason will be clear in a bit.
Now reset bolt, so not threaded part is out of the collet.
Place a washer first, then one skinny nut, then disk followed by last skinny nut.
You now can turn flat BOTH sides of the disk as well as turn the diameter.
You can face the disk all the way to where the skinny nut is located.
Your vise is the tool holder.
If you place the cutter in the vise just right with the top at an angle, you can use steps to make a tapered face on the disk.
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