Finding the centre of a blank without putting in a small drill bit first is particularly important for segmented blanks that will show any errors can be quickly solved using the trick.
* Put a bit of plasticine onto the drill bit
* Put in a very small drill or a needle if you can find one ( I couldn't!)
* Run the drill and gently touch the small drill bit with a file, spanner or anything with a straight edge
*This will now show the centre of the drill bit in the chuck
* Bring the workpiece into line and clamp
There may be other ways but this one works for me
* Put a bit of plasticine onto the drill bit
* Put in a very small drill or a needle if you can find one ( I couldn't!)
* Run the drill and gently touch the small drill bit with a file, spanner or anything with a straight edge
*This will now show the centre of the drill bit in the chuck
* Bring the workpiece into line and clamp
There may be other ways but this one works for me