Martin 6018 X 2 - Motion
Chain Couplings - McMaster-Carr
Martin 6018 X 1-1/2 - Motion
1-1/4" Bore 50 Pitch 18 Tooth Chain Coupler Half
1-1/2" Bore 60 Pitch 18 Tooth Chain Coupler Half
G&G Manufacturing Company - Roller Chain Flexible Coupler Sprockets
G&G Manufacturing Company - Couplers / Clutches
5/8" Smooth 50 Pitch 16 Tooth Chain Coupler Half CS5016H-SB
Martin 5018 X 1-1/2 - Motion
MARTIN 8020H CHAIN COUPLING HALF X 2-15/16 BORE