BlackStar 100BTL21 - 100 Pitch Taper Lock Sprocket - 21 Tooth H Section Is 12/B104 the same as

Is 12/B104 the same as other brands' 12/B104

so a 25T5/480US from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

The D&D Global 340K12 is a Micro-V (multi-ribbed) belt with Micro-V ribbed K-section dimensions

What is 116XL1770 used for

BlackStar 100BTL21 - 100 Pitch Taper Lock Sprocket - 21 Tooth H Section Is 12/B104 the same asThe BlackStar 100BTL21 is a 100 pitch Taper Lock roller chain sprocket with 21 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a Taper Lock Bushing (sold separately). Specifications Part Number 100BTL21 Chain Pitch 100 Number of Teeth 21 Bore Type Taper Lock Hub Style Taper Lock Bushing Required Taper Lock Bushing Strand Count Single Material Steel