I have the need to cut matching tapers, one male one in brass that sits on the drive shaft of my engine 1/4″ dia and the other matching female taper has to be cut in a mild steel flywheel.
Because the tapers are quite small, the ‘cone’ of the male part is a slither over 1/4″ at one end and no more than 9mm diameter at the other. The height/length of the cone is no more than 8mm.
My issue is that I am struggling to cut the female taper without the line of the ‘slant height’ curving.
The boring tool, which I have cut from 5mm x 5mm HSS is by necessity quite thin to reach into the bore of the taper and I suspect it is deflecting, despite my very light cuts.
Is there a better way please? Even if this involves buying a purpose made tool, as the need to cut these tapers seems to reoccur a fair bit!
Many thanks P.McD