BlackStar 5/8 SS DBL SPL - Double Split Collar (2-Piece) - 5/8" Bore Multi-Duty QD 250-S5M-1055 is a timing belt

250-S5M-1055 is a timing belt used on positive

Cross-references: Martin D40TB52

so the 3VX600 interchanges with Gates 3VX600

Continental XPZ1537

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BlackStar 5/8 SS DBL SPL - Double Split Collar (2-Piece) - 5/8" Bore Multi-Duty QD 250-S5M-1055 is a timing beltThe BlackStar 5 8 SS DBL SPL is a double split collar (2 piece), manufactured from stainless steel. Features a 5 8" bore for direct shaft mounting. Two piece clamp collars provide the strongest shaft grip without keyways. The two halves bolt together around the shaft, allowing installation without disassembling drivetrain components. Used where high holding force and easy field adjustment are required. Specifications Part Number 5 8 SS DBL SPL Product