Posted by Malcolm Brown on March 09, 2008 at 17:15:18:
In Reply to: Re: Gear keyway posted by BillS on March 08, 2008 at 13:21:04:
No don,t think that,s it. From another drawing I think a B.S. No4 is a 3/4" taper key but don,t know if it,s square or rectangular.Another point is am not now sure the B.S. means British Standard.Could be Brown & Sharpe for instants.