BlackStar H100E21 - 100 Pitch QD Sprocket - 21 Tooth Stainless Steel Taper-Lock Bushings Pitch Profile T5 Pitch 5

Pitch Profile T5 Pitch 5 mm Tooth Profile Trapezoidal Tooth Location Single Side Number of Teeth 166 Width 4mm Length 830 mm Material Polyurethane Reinforcement Aramid (Kevlar) Color White/Gray Temperature Range -20°F to 158°F

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Bore Size 1-15/16" Housing Style 2-Bolt Flange Block Insert Series HC Shaft Attachment Eccentric Housing Material Cast Iron Bearing Type Ball Bearing Dynamic Load Rating 7

so the Megadyne A69 interchanges with Gates

so a 1250-5M-25 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar H100E21 - 100 Pitch QD Sprocket - 21 Tooth Stainless Steel Taper-Lock Bushings Pitch Profile T5 Pitch 5The BlackStar H100E21 is a 100 pitch QD roller chain sprocket with 21 teeth, precision manufactured from SAE 1045 steel with induction hardened teeth for extended wear life and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a QD Type E Bushing (sold separately). Specifications Part Number H100E21 Chain Pitch 100 Number of Teeth 21 Maximum Bore 3 1 2" Bore Type QD Hub Style QD Bushing Required QD Type