The 100BS09H X 1 1/4 is a finished bore roller chain sprocket for roller chain power transmission in industrial, conveyor and agricultural drives. Built for accurate chain engagement, even load distribution and long service life under continuous duty. Specifications: - Manufacturer Part Number: 100BS09H X 1 1/4 - Product Type: Finished Bore Roller Chain Sprocket - Material: Forged 1045 Alloy Steel - Pitch: 1.25 in - Pitch Diameter: 3.655 in - Chain Size (Number): 100 (1 1/4 in) - Number of Strands: 1 - Number of Teeth: 9 - Bore Diameter: 1.25 in - Bore Type: Finished Bore with Keyway and Set Screws - Outer Diameter: 4.18 in - Overall Width: 1.875 in - Tooth Width: 0.692 in - Part Weight: 3.2 lb Stocked and shipped fast from offroadbelts.com. Industrial-grade replacement part for OEM, MRO and maintenance buyers — order with confidence.