BlackStar DS50A16H - Double-Single 50 Pitch A-Plate Sprocket - 16 Tooth S14M v=1698991265"

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The Gates P52-20M-340 PowerGrip HTD Sprockets 78824044 is a timing belt sprocket

The BlackStar 80BS34 1 1/2 K2S is a 80 pitch Finished Bore roller chain sprocket with 34 teeth

What is 12/D158 used for

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BlackStar DS50A16H - Double-Single 50 Pitch A-Plate Sprocket - 16 Tooth S14M v=1698991265"The BlackStar DS50A16H is a 50 pitch double single strand A Plate roller chain sprocket with 16 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Specifications Part Number DS50A16H Chain Pitch 50 Number of Teeth 16 Bore Type Plain Bore Hub Style A Plate Strand Count Double Single Material Steel Outside Diameter 3. 52" Pitch Diameter 3. 204" Approx. Weight 2. 400 lbs Cross