BlackStar 3535 1 9/16 - Taper Lock Bushing - 1 9/16" Bore 3.1/2" 330H100 is a timing belt

330H100 is a timing belt used on positive

so the 10/D270 interchanges with Gates 10/D270

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What is 12/B148 used for

BlackStar 3535 1 9/16 - Taper Lock Bushing - 1 9/16" Bore 3.1/2" 330H100 is a timing beltThe BlackStar 3535 1 9 16 is a 3535 series taper lock bushing with a 1 9 16" finished bore, precision manufactured from high grade steel. Taper Lock bushings provide a secure, concentric grip on the shaft through a precision machined taper, ensuring reliable power transmission. Specifications Part Number 3535 1 9 16 Bushing Type Taper Lock Series 3535 Bore Size 1 9 16" Minimum Bore 7 8" Maximum Bore 3 1 4" Outside Diameter 5. 090" Length 3 1 2"