A corroded circular saw blade from the Oliver Grist & Shingle mill on the West Branch of Robinhood Cove, in Georgetown, Maine (US-ME-071 in the TMI database), has what appears to be a reinforcing hub. TMI’s Harry Hopcroft asks if anyone can provide information about this blade configuration. Was this center hub, apparently attached to the blade with bolts, common on circular saw blades, or was it a special construction for sawing shingles?
The blade is 34 inches in diameter and the center hub is 14 inches in diameter. The spindle hole is 2 inches. The main blade is only 1/8-inch thick, while the add-on hub is 1/2-inch thick at the spindle and tapers to nothing at its edges.
If you can shed light on this type of blade construction, please comment (see link below) or send email to info@tidemillinstitute.org.
