BlackStar 3-3V690SDS - QD Sheave T5 Section What is the temperature rating

What is the temperature rating of 3/C270

The BlackStar 60BS72 1 1/2 K2S is a 60 pitch Finished Bore roller chain sprocket with 72 teeth

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BlackStar 3-3V690SDS - QD Sheave T5 Section What is the temperature ratingThe BlackStar 3 3V690SDS is a 3 groove qd sheave for 3V section belts, manufactured from cast iron. Requires a QD Type SDS Bushing (sold separately). Specifications Part Number 3 3V690SDS Product Type QD Sheave Number of Grooves 3 Belt Profile 3V Outside Diameter 6. 90" Bushing Required QD Type SDS Bushing Material Cast Iron Approx. Weight 8. 900 lbs Pitch Diameter 69. 0" Compatible Belts 3V Bushing Required This sheave requires a QD Type SDS Bushing