BlackStar 120F54 LH - 120 Pitch QD Sprocket - 54 Tooth 1.1/4" com/s/files/1/0666/7721/products/Single_Wrapped_V_Belt_5e575e57-9b0f-4ee5-a095-cb7acfdc8267

com/s/files/1/0666/7721/products/Single_Wrapped_V_Belt_5e575e57-9b0f-4ee5-a095-cb7acfdc8267

com/s/files/1/0666/7721/products/QD_Sheave_315ea675-d5fa-4727-97b5-0f7e4fdc13dc

so the Megadyne AA120 interchanges with Gates

"text": "150-S5M-520 has a 5 mm tooth pitch

531 in Sheave Angle 40° Number of Bands 2 Length 175 in (Outside Circumference) Construction Synthetic Rubber

BlackStar 120F54 LH - 120 Pitch QD Sprocket - 54 Tooth 1.1/4" com/s/files/1/0666/7721/products/Single_Wrapped_V_Belt_5e575e57-9b0f-4ee5-a095-cb7acfdc8267The BlackStar 120F54 LH is a 120 pitch QD roller chain sprocket with 54 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a QD Type F Bushing (sold separately). Specifications Part Number 120F54 LH Chain Pitch 120 Number of Teeth 54 Maximum Bore 3 15 16" Bore Type QD Hub Style QD Bushing Required QD Type F Bushing Strand Count Single Material Steel