The Oregon Chainsaw sharpener: a fast & effective option.
Oregon Professional 120-Volt Bench Grinder Universal Saw Chain Sharpener, for All Chainsaw Chains (520-120), Large | Electric chainsaw sharpener, Chainsaw sharpener, Electric chainsaw
Oregon Compact 120-Volt Mini Bench Grinder, Universal Saw Chain Sharpener, for A | eBay
Chainsaw Chain Bench Grinder Sharpener With Stones Replaces Oregon 310-120