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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ATD Morse Taper
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<blockquote data-quote="Marcus Bowden" data-source="post: 130897" data-attributes="member: 3287"><p>It is definitely not a morse taper as that is 1 in 20. What I did with my old BTH mag/dyno with a mullered shaft and the keyway was unusable so cut the end thread taper & a bit more of the armature, using a fixed steady, faced it off, drilled and tapped. Turn up a new shaft screw it in with Loctite and a small roll pin, back into the fixed steady true up and centre drill, fix between centres, machine thread and then taper, taking care not to machine too much but keep checking taper with a good mag pinion hub, keep testing fit until it tends to stick with no wobble, tis just trial and error as if the cutting tool is too high or low this will vary the taper. Before the final fitting use fine grinding paste and lap briefly, this gives a good surface to tighten up on.</p><p>bananaman.</p></blockquote><p></p>
[QUOTE="Marcus Bowden, post: 130897, member: 3287"] It is definitely not a morse taper as that is 1 in 20. What I did with my old BTH mag/dyno with a mullered shaft and the keyway was unusable so cut the end thread taper & a bit more of the armature, using a fixed steady, faced it off, drilled and tapped. Turn up a new shaft screw it in with Loctite and a small roll pin, back into the fixed steady true up and centre drill, fix between centres, machine thread and then taper, taking care not to machine too much but keep checking taper with a good mag pinion hub, keep testing fit until it tends to stick with no wobble, tis just trial and error as if the cutting tool is too high or low this will vary the taper. Before the final fitting use fine grinding paste and lap briefly, this gives a good surface to tighten up on. bananaman. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
ATD Morse Taper
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