BlackStar 40B42 - 40 Pitch B-Hub Sprocket - 42 Tooth Idler "text": "5/3VX560 has a top

"text": "5/3VX560 has a top width of 2

so a 2/B130 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

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What does the T10US in 16T10/1050US mean

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BlackStar 40B42 - 40 Pitch B-Hub Sprocket - 42 Tooth Idler "text": "5/3VX560 has a topThe BlackStar 40B42 is a 40 pitch B Hub roller chain sprocket with 42 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Specifications Part Number 40B42 Chain Pitch 40 Number of Teeth 42 Minimum Bore 3 4" Maximum Bore 2 3 8" Bore Type Plain Bore Hub Style B Hub Strand Count Single Material Steel Outside Diameter 6. 97" Pitch Diameter 6. 691" Approx. Weight 4. 82 lbs Cross