Ground Drive Header.

Would anyone be able to tell me the number of teeth on the spur gear and the drum cog as fitted to the early Sunshine HV McKay Header.
Thank You.

Hello D8H,
From an old parts book in which appears to be a photo of the bits laid out flat I have counted with a magnifying glass 115 teeth on the driving gear and options of 15, 17 and 18 teeth on the driven ones, I can contact a friend who has a machine if you need an accurate count.
Curious as to what you are doing.
David.

wouldyou wrote: Hello D8H,

Curious as to what you are doing.
David.

After reading an article in a October 1948 Power Farming re converting a ground drive header to PTO, I became
curious as to what the original drive ratio was.
Figures quoted in the article are, front Pinion Shaft 113 RPM Rear 146 RPM.
Drum Speed 830 RPM.
Thanks for your reply.