SRB Motor Plate Set (set includes two Chromoly motor plates, aluminum support bar and hardware)
Standard Plate set, 1/8" 4130 chromoly steel, 30mm motor bolt pattern, 1/2"-20 threaded mount and 188mm Aluminum motor plate support, 8 or 10mm motor shaft, belt drive ok, open gear drive ok
HD Motor Plate Set, 5/8-18 threaded mount and 212mm Aluminum support bar 8 or 10mm motor shaft, 30mm or 40mm motor bolt pattern, belt drive ok, open gear drive ok.
HD 30mm pattern is 3/16" thick 4130 chromoly steel
HD 44mm pattern is 3/16" thick 4130 chromoly steel