What should I expect when I spin grind?

While there is a tremendous amount of discussion about "Spin Grinding" vs. "Relief Grinding", facts are, anyone can "spin" grind with similar "sharpening" results. There has been thought that the type of finished "spin" grind can be different from various grinding systems in the field, but photos below show what can be expected.

A concave grind as shown could not be duplicated on any reel grinding system that Foley United tested.
FOLEY UNITED ground reel: The deviation from the front cutting edge to the rear of the reel blade is .0073" in relation to the cutting path of the reel blade.
EXPRESS DUAL ground reel: The deviation from the front cutting edge to the rear of the reel blade is .0085" in relation to the cutting path of the reel blade.

The bottom line results show there is little difference in the spin grind process from one style of grinder to another. All grinders capable of spin grinding will produce similar results with slight deviation from the front cutting edge to the rear of the blade.