Wot No Teeth?

In the end I began by setting the flywheel vertically on the milling machine and, using a slitting saw (4" x 1" x 1/32), I undercut the teeth at the root in tangential increments. This is a laborious process as there are 80 teeth and the saw would only span 5 or 6 teeth at a time.

Edited By JasonB on 09/02/2020 16:23:09

The reason you have had problems is that you've tried to do the job upside down!!!!

Glad it worked out and that, hopefully you will be back on the road for a super sunny summer.

Brian

So the next task will be to find a suitable ring gear to shrink onto the toothless flywheel?

Sadly, ring gears do get worn in the same place, because the engine always comes to a stop in the same place..

It is galling to throw away a ring gear because five or six teeth are badly worn, when the others are in relatively good condition.

The ordinary Bendix engagement, where the rotating pinion goes against the ring gear, whether the teeth mesh or not is the worst offender. At least the solenoid pre engaged type of starter is much kinder in that it does not apply full power until the pinion has meshed with the ring gear.

But we have to live with what Herbert Austin though was best (cheapest? ) or was available at the time.

Howard

ring gears are quite cheap, easy to fit.........

the old days where bendix starters were used 1 replacement ring gear per life of the car......

not to bad really is it.....???

Darn it!

I had always assumed that a pre-engaged starter drive would be kinder to the gears compared with the bendix system.

I'm late to this one but I cleaned up the OD of the flywheel by mounting it on a crank between centres. I then held it via the ID with a 4 jaw, trued it up with a dial gauge and just turned the teeth off (as shown). It's easier when the lathe is 1.5 tons of CVA but even so it was a filling loosening job!