Apologies for the rather peculiar subject line. I am in need of three chainring bolts for an early two-arm Chater Lea chainset. If anyone has these beasts could you please let me know?
Failing that, my next-door neighbour is a tool-maker/ machinist for the National Research Council here in Ottawa (making minutely exacting parts for testing jet engines and the like) who has offered to make a set for me in stainless steel. He did ask me, however, about the pitch of the thread and whether these were Whitworth thread? Am I right in assuming they are? Please excuse my ignorance, but I know B-all about such things. I told him I would make enquiries. Therefore, does anyone know the thread-count and pitch of these fixing bolts?
Paul Williams, Ottawa, ON, Canada
Dr. Paul B. Williams, BAH, MPhil, PhD Instructor, Dept. of Geography and Environmental Studies, Carleton University, Ottawa, ON, Canada