Tsubaki D140B21F Double Roller Chain Sprocket

Description:

The Tsubaki D140B21F Double Roller Chain Sprocket is used in heavy-duty industrial power transmission systems to drive ANSI No. 140-2 double-strand roller chains for high-torque applications. Commonly installed in mining equipment, bulk material handling systems, heavy-duty conveyors, cement plants, steel mills, and aggregate processing machinery requiring robust chain drive performance. Maintenance teams and system integrators use this sprocket for repair, retrofit, expansion, or replacement to restore precise chain engagement and dependable mechanical power transmission.

Applications:

The Tsubaki D140B21F double roller chain sprocket is engineered for demanding industrial chain drive applications where high load capacity and extended service life are essential. Its double-strand configuration, 21-tooth design, and finished 3-3/4 inch keyed bore provide reliable torque transmission for heavy conveyors, crushers, processing equipment, and other industrial machinery operating under continuous-duty conditions. Hardened teeth improve wear resistance and extend sprocket life in abrasive environments.

Technical Specifications:

• Manufacturer: Tsubaki Emerson Co.
• Model / Part Number: D140B21F
• Product Type: Double Roller Chain Sprocket
• Series: Type B Finished Bore Sprocket
• Compatible Chain Size: ANSI No. 140-2 Double Strand Roller Chain
• Number of Teeth: 21
• Number of Strands: Double
• Chain Pitch: 1-3/4 in (44.45 mm)
• Bore Size: 3-3/4 in Finished Bore
• Keyway Size: 7/8 in
• Length Through Bore: 3.75 in
• Material: Carbon Steel
• Finish: Black Oxide
• Tooth Hardening: Hardened Teeth
• Outside Diameter: 12.660 in
• Pitch Diameter: 11.743 in
• Hub Diameter: 7.000 in
• Mounting: Shaft mounted with keyed bore
• Function: Drives ANSI No. 140-2 double-strand roller chain for heavy-duty power transmission
• Application: Heavy-duty conveyors, mining equipment, aggregate processing, steel mills, cement plants, and bulk material handling systems

Common Replacements:

• Tsubaki D140B20F Double Roller Chain Sprocket
• Tsubaki D140B22F Double Roller Chain Sprocket
• Tsubaki D140A21 Double Roller Chain Sprocket