Does anyone know of a source for these? I assume that any mag sprocket from a JAP or similar will be the correct taper and as long as there are a pair and the diameter is not too large they should work.
Series 'A' Twin Magneto Drive Sprockets
- Thread starter billirwinnz
- Start date
G'day Bill, we met boarding the Tassie ferry a couple of years back. I remember posting the taper on the Forum in 2018. It is a German (Bosch?) standard from the early 1900's. 1 in 10 if I remember correctly. Generator taper is the same.
Taper 1 : 10 yes.
Pinion?? Maughan, Vocsp?
Pinion?? Maughan, Vocsp?
Conways?
Neal Videan was involved with the A twin reps. A toothy belt conversion was made. Or sprocket blanks are cheap enough to machine up to suit.
Not being confident in machining tapers and getting the sprocket alignment right for my JAP engine I cheated by using blank sprockets and machining the centre parallel, one to take part of a centre from a scrap ATD unit and the other from a BSA twin dynamo sprocket with the teeth machined off.
This way I could press them in and out to get perfect alignment before welding them in place and re-hardening.
This way I could press them in and out to get perfect alignment before welding them in place and re-hardening.
Hi Charlie
I remember our meeting. Now you are world famous on FB for having all the answers! Yes. 1 in 10. Interestingly I have an Italian magneto with a different taper but a French one 1:10.
I haven't tried Maughans
Nothing on their website and waiting for a reply to my email.
Neal's belt pulleys need a wider case. I'll go with the sprocket blanks as a last resort.