ATCO 12" MOWER
visconol
Thu, 03/07/2014
I am in the process of restoring a 1947? Atco 12" 2 stroke mower, what I would like to know is the thread on the screws, they look like BSF but they are not,they are not BSW either? what could they be?
Ray
Forums
Threads
Like Wristpin, I would expect them to be Whitworth. Those on my 1949 12 inch certainly are. In fact I had to buy a set of Whitworth spanners for the job.
Suggest you use a thread gauge on them. Perhaps somebody has changed them over the years?
Atco threads
AS far as I know, a machine of that date would have BSF and BSW threads, it was not until the 60s that Atco adopted UNF/UNC. However if you are sure that the fine threads are not BSF (or UNF) I suppose that there is a possibility that they are Cycle Threads as used on some JAP engines.