Prairie Tool Co., model 85 crank grinder

Model 85 grinder from Prairie Tool Co., Prairie du Chien, WI.; made sometime after 1920. The 15:1 gear ratio = 900 RPM at one crank per second. Slightly less beefy than the Goodell Pratt but still a heavy duty and quality built grinder. Unfortunately mine is missing the tool post.

Sturdibilt Model 85

Before and after videos:

Looks like a grease zerk but isn't, it's for oiling the arbor shaft.

Before I removed 90 years of petrified grease.