BlackStar 12-8V1700M - QD Sheave Multi-Rib Belt "text": "The 7/D315 is used

"text": "The 7/D315 is used for high-shock and high-vibration drives

290K7 Micro-V Belt

The 2/B145 is a banded v-belt from D&D Global's Dura-Prime Band Classical - B Series line

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BlackStar 12-8V1700M - QD Sheave Multi-Rib Belt "text": "The 7/D315 is usedThe BlackStar 12 8V1700M is a 12 groove qd sheave for 8V section belts, manufactured from cast iron. Requires a QD Type M Bushing (sold separately). Specifications Part Number 12 8V1700M Product Type QD Sheave Number of Grooves 12 Belt Profile 8V Outside Diameter 17. 00" Bushing Required QD Type M Bushing Material Cast Iron Approx. Weight 341. 000 lbs Pitch Diameter 17. 0" Compatible Belts 8V Bushing Required This sheave requires a QD Type M Bushing