BlackStar 50BS44 1 3/8 K2S - 50 Pitch Finished Bore Sprocket - 44 Tooth - 1-3/8" Bore 5.15/16" What is the temperature rating

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BlackStar 50BS44 1 3/8 K2S - 50 Pitch Finished Bore Sprocket - 44 Tooth - 1-3/8" Bore 5.15/16" What is the temperature ratingThe BlackStar 50BS44 1 3 8 K2S is a 50 pitch Finished Bore roller chain sprocket with 44 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 3 8" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 50BS44 1 3 8 K2S Chain Pitch 50 Number of Teeth 44 Bore Size 1 3 8" Minimum Bore 3 4" Maximum Bore 1 15 16"