Type B Sprockets: The Industry Standard | Single Hub for Reliable Power Transmission
The Type B sprocket, featuring a hub extended on one side, is the most common and versatile sprocket configuration in industrial power transmission. Donghua manufactures precision Type B sprockets to ANSI, DIN, and ISO standards, providing the perfect balance of strength, shaft support, and easy installation for conveyors, machinery, and drive systems. As a leading manufacturer since 1991, our Type B sprockets deliver long-lasting performance you can trust.
What is a Type B Sprocket?
A Type B sprocket is defined by its hub-a thickened section around the central bore-that extends on only one side of the sprocket plate. This design offers several key benefits:
- Enhanced Shaft Support: The single hub provides a longer bearing surface on the shaft, increasing stability and reducing wear compared to a Type A (plate) sprocket.
- Versatile Mounting: It is the standard choice for most applications where the sprocket is mounted at the end of a shaft or against a shoulder, allowing for a secure fit.
- Space Efficiency: The single-sided hub saves space on the opposite side, which can be critical in compact machinery designs.
- Stronger Connection: The added hub material allows for a longer keyway and set screw engagement, transmitting higher torque reliably.
Understanding Sprocket Hub Types (A, B, C, D)
| Hub Type | Description | Typical Use Case |
|---|---|---|
| Type A | Plate sprocket, no hub. | Idlers, or where space is extremely limited. |
| Type B | Hub on one side. | The most common type. Ideal for end-of-shaft mounting and general drives. |
| Type C | Hubs on both sides (equal). | Larger sprockets, or when mounted in the middle of a shaft. |
| Type D | Hubs on both sides (unequal). | Special applications requiring precise positioning. |
Our Type B Sprocket Manufacturing Capabilities
| Specification | Available Options from Donghua |
|---|---|
| Standards | ANSI (ASA), DIN (European), JIS (Asian), or custom sizes per your drawing. |
| Materials | C45 carbon steel, 304 stainless steel, Q235, Q345, 40Cr alloy steel, and more. |
| Heat Treatment | Induction hardening, flame hardening, through-hardening. |
| Surface Treatment | Black oxide, zinc-plated, chrome-plated, paint, polished, and more. |
| Tooth Count | Wide range available (e.g., from 9 to 112 teeth). |
| Chain Compatibility | Simplex, duplex, and triplex chain sprockets available. |
| Bore & Keyway | Finished bore, pilot bore, custom bore with keyway and set screw holes. |
| Manufacturing Process | Cutting, forging, CNC lathe machining, gear hobbing, heat treatment, fitting, inspection. |
| Applications | Textile machinery, food processing, packaging equipment, conveyors, automotive lines, material handling, and more. |
- The Sprocket & Chain Expert: As one of the world's largest chain manufacturers, we have an unparalleled understanding of how sprockets and chains work together. Our Type B sprockets are engineered for optimal meshing and wear life with our world-class chains.
- Complete In-House Control: From raw material selection and heat treatment to precision machining and finishing, we control every step. This ensures consistent quality, precise tolerances, and reliable performance.
- Extensive Range & Customization: We stock and manufacture a vast array of Type B sprockets in all standard sizes. Need a non-standard bore, a special material, or a unique finish? Our engineering team can create a custom solution for you.
- Global Capacity, Local Support: With over 3,100 skilled employees and a massive production facility, we have the capacity to handle orders of any size, with the expertise to support you globally.
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