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The BlackStar 50BS56 1 15/16 K2S is a 50 pitch Finished Bore roller chain sprocket with 56 teeth
"mpn":"TB072053924657"
Belt Section A Sub-Type Banded Width 1/2" Thickness 5/16" Length 58 in Number of Bands 11 Material Neoprene Reinforcement Polyester Cord Color Black Temperature Range -30°F to 185°F
so the 3/B115 interchanges with Gates 3/B115
BlackStar H100E18 - 100 Pitch QD Sprocket - 18 Tooth Curved (HTD) The BlackStar 50BS56 1 15/16The BlackStar H100E18 is a 100 pitch QD roller chain sprocket with 18 teeth, precision manufactured from SAE 1045 steel with induction hardened teeth for extended wear life and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a QD Type E Bushing (sold separately). Specifications Part Number H100E18 Chain Pitch 100 Number of Teeth 18 Maximum Bore 3 1 2" Bore Type QD Hub Style QD Bushing Required QD Type
