Hi all,
Following the recent thread re 90 deg drills and grinder conversions .. I bought a 13m capacity key'd chuck with 1/2" -20 UNF female thread (with SDS adaptor) from the market today (for +AKM-3) to play with ;-)
Mum and Dad happened in Makro and collected the nutool mains drill and mini grinder combo for +AKM-14.99 (+-Vat) for me (bless) ;-)
So, to make my 90 deg drill I might be able to drill / bore (on the lathe) and tap the chuck out to 14mm then it would screw directly onto the angle driver removing the need for the 'converter' in-between? In this config the 'length' of the whole unit will be about 6" (150mm).
So, from what I can see, the tapping drill for 1/2" UNF is 10.8mm with the outer thread size of about 12.4 mm. I think the tapping drill size for a '14' mm thread is 12mm with a final thread size of about 13.7mm? Assuming I'm right with the numbers do you think I could get away with that?
All the best ..
T i m