Welding fins onto a BSA head, CV or slide carb dilemma, plus how to make a flared oil pipe end
Making a oil pipe for the Rudge brought up a problem that demanded a bit of automobile technology
1 There’s no room for a ‘wrist’ on the olive that goes with this threaded sleeve, leaving very little surface area for soldering – the joint may not be strong enough.
2 So I decided to form an olive with a brake pipe flaring tool instead. This old Sykes Pickavant kit flares pipes from 3/16in to 3/8in diameter.
3 The pipe is gripped in taper-bodied, serrated chucks which tighten into the frame, then the flaring arbor is pressed into the end of the pipe with a T-handled screw.
4 It’s worth annealing the pipe first by heating to red hot and quenching. The result is a very neat double flare that can’t pull off the end of the pipe.