30-08-2018, 08:10 AM
(29-08-2018, 06:02 PM)jansens Wrote: I'd be careful using taps as guides. They are very hard and brittle and you really don't want one breaking off inside the hole!
Can you use 5/16 UNC bolts instead as guides? From memory they will fit although the pitch angles are different. I might have that wrong so wait till someone else confirms. I know I have definitely mixed up 1/4 Whitworth and UNC before.
Simon
Thank you Simon and others who have responded — I won’t use the taps. It’s a fresh day and maybe a new approach will be successful. I can’t see the practical purpose of that mating spline. Was it just always done that way or is there a reason for it?
Charles