Hollow grinding - 8 vs 6 inch wheels - The Pegbox - Maestronet Forums
Double Wheel Grinder Closer Look - YouTube
Belt Grinder 2" x 72" Wheel Bearing Set with 5" Drive & 5/8" Bore & 3" Track & 2" Idler for Knife Grinder - Amazon.com
Hollow Grinders | PRIMEedge
Model 960-272 2 x 72 Two Wheel Belt Grinder - Product Details
Hollow Grinders | PRIMEedge
Belt Grinder 2x72 Wheel Set Perfect for Knife Grinder, Complete Belt Knife Grinder Wheel Set Including 4" Drive Wheel with 5/8" Bore 3" Tracking Wheel 2" Idler Wheels (4"5/8-3"-2") - Amazon.com