Hitchcocks Forum

Does anyone have a 61 Constellation magneto sprocket puller. Its the manual advance mag. I need to know the number of threads per inch and the diameter of the piece that threads into the sprocket. I have my sprocket off, but I can't get into the hole to measure the TPI's. I'll make my own puller on my lathe but just need that little bit of info.
Thanks
Al

IIRC it is 7/16 26 tpi?

The diameter is closer to 5/8" than 7/16. I'm talking about the internal threads on the magneto sprocket that the puller threads into.