Turner Take-Up Unit - 1-7/8" Bore, Set Screw Locking Collar TL1310 com/products/d-and-d-305k15-micro-v-belt"

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Sheave Type QD Groove Count 5 Outside Diameter 21

The BB300 has a 21/32" width

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The BB129 is used for serpentine drives with multiple driven pulleys

Turner Take-Up Unit - 1-7/8" Bore, Set Screw Locking Collar TL1310 com/products/d-and-d-305k15-micro-v-belt"The Turner UCST210 30 is a take up unit mounted bearing unit with a 1 7 8" bore. It features a UC series insert with set screw locking in a cast iron housing. Pre lubricated and ready for installation. Product Specifications Bore Size 1 7 8" Housing Style Take Up Unit Insert Series UC Shaft Attachment Set Screw Housing Material Cast Iron Bearing Type Ball Bearing Dynamic Load Rating 7,868 lbs Static Load Rating 5,330 lbs Limiting Speed 3000 RPM Bolt