Awesome. Thank you George. Is that one hard/a pain to adjust for different size blanks? It looks pretty straight forward, but I'm guessing you turn that collar to adjust your center? Or is that not even necessary...?
Mark,
This is a self centering vice, if fix to the drill press base at the drill centre, regardless of what size blank you put on it, it will self centre for the hole.
The maximum size the jaws open is 33mm!
This vice also has a "locking" position, there is, you adjust the vice to the blank size you are drilling and then you adjust the locking nut to lock the jaws from opening while drilling. This locking action in noted when the adjustment is right and the jaws handle, feel firm on contact with the blank (square or round) and then a slight short second stage forward of the handle and you feel a "click" into locking position (hard to explain, sorry...!)
If your blanks are all the same then, this adjustment doesn't need to be touched in between drilling, otherwise a simple and easy rotation of the locking nut will re-position the correct locking point for other blanks sizes.
This locking process can be by-passed if you want, you can simple put any size blank on the already centered and fixed vice and used the jaws handle to keep the blank firmly into place, you just have to keep one hand holding it there while you drilling...!:wink::biggrin:
The off-cuts from the blanks are ideal to be used as sacrificial blocks when drilling, inserting one of this short off-cuts between the jaws and then inserting the blank over it making good contact in between them (push the blank down as you close the jaws), will not only void blowing the wood on exit from the drill bit as also will protect the drill bit from getting damaged against the base of the vice (this protects the vice also...!)
These are about AU$80.00 to buy here in Australia
Cheers
George