Thinking about sprocket rims today. Going back some 24 years ago when I was new to the logging and chainsaw world, I recall that my mentor who was an almost retired bull buck and veteran timber feller. Old man Pete is what we called him, originally from Kake, Alaska, which is a dot on the map logging camp lol. He started with mac 125 and 090g saws cutten big timber in the 60's and 70's. He even climbed big Sitka spruce trees with the 090 to top em! He knew a thing or two. So anyways at some point in my early career, I went to the sawshop to buy a new sprocket rim for my then new 371xpeee. Guy at the counter asked what pitch and what size. Being unfamiliar with the lingo I said whatever the saw came with!
I went to old man Pete later that day and he skooled me on lingo, chains, and of course sprockets. So, the old man first tells me the main reason for a larger sprocket was to address a stretched out chain so a Sawyer didn't have to shorten up a link out in the bush. The secondary effect was loss of torque and increase chain speed.
I find it interesting that no one mentions this, seem lost with the old time loggers. Just a little tid bit I thought I would share.
