Tapering a flywheel shaft hole

[colin calverParticipant @colincalver]

[colin calverParticipant @colincalver]

Need guidance on this problem.

Drawing for flywheel shows 6mm hole entry for shaft , however it is taper down to 4mm over 9.5mm to outside of flywheel, it is then secured with m4 nut to shaft.

How would this be done?

[JasonBModerator @jasonb]

Angle the topslide of your lathe and bore a tapered hole, while its at the same setting also turn the taper on the shaft or collet if it has one then they will match perfectly.

Thats also quite a small hole to get a bar into though it can be done you may find it easier when turning the male part to then turn a matching taper on a piece of silversteel and make a "d bit" type reamer by milling/filing half th ewidth away, hardening and then feeding it into a 4mm hole in the flywheel

 

J

Edited By JasonB on 24/06/2014 10:28:13

Edited By JasonB on 24/06/2014 10:28:57

[Jon GibbsParticipant @jongibbs59756]

+1

If you mount your boring bar upside down and cut on the backside then you'll get a better fit if you're machining the shaft at the same topslide setting.

HTH

Jon

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