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When a worn or mismatched sprocket causes chain skip, premature wear, or unexpected downtime, finding an exact-spec 06B sprocket wheel replacement becomes urgent. This product is designed for engineers, maintenance technicians, and serious DIY builders who need a dimensionally accurate, durable sprocket that drops straight into existing 06B roller chain drive systems without modification.
Each sprocket is machined from 45# medium-carbon steel and hardened for wear resistance. The pitch is 9.525mm (3/8 inch) — the standard for 06B chain — with tooth counts ranging from 9 to 50 teeth (approximately 0.35 in to 1.97 in pitch diameter range). The set also includes a matching 06B roller chain (1.5 m length) and full/half buckle link options for complete drive assembly or repair.
Typical use cases include conveyor drive systems requiring a 06B sprocket wheel replacement, small industrial gearbox output shafts using 3/8-inch pitch roller chain sprockets, and DIY automation rigs, go-karts, or agricultural equipment needing a compact 9.525mm pitch chain drive sprocket with selectable tooth count.
| Chain Standard | 06B (ISO 606 / BS 228) |
|---|---|
| Chain Pitch | 9.525 mm (3/8 in) |
| Tooth Count Options | 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 42, 45, 50 |
| Material | 45# Medium-Carbon Steel |
| Surface Treatment | Hardened (induction or through-hardened) |
| Bore Diameter | See variant options |
| Hub Style | See variant options |
| Pitch Diameter Range | Approx. 27 mm – 152 mm (1.06 in – 5.98 in) across 9–50 teeth |
| Roller Chain Included | 06B Roller Chain: 1.5 m length (select variant); Full Buckle 4PCS or Half Buckle 2PCS connecting links available |
| Pack Quantity | 1 / 2 / 3 / 5 pcs (select variant) |
| Weight (per unit) | See variant options |
The tooth count determines your drive ratio. Divide the driven sprocket teeth by the driver sprocket teeth to get the reduction ratio. For example, a 9-tooth driver paired with a 27-tooth driven sprocket gives a 3:1 reduction. Choose a smaller tooth count on the driver for more torque, or a larger count for higher speed. If you are replacing an existing sprocket, match the tooth count exactly to maintain your current ratio.
Yes — provided your chain is a standard 06B (ISO 606 / BS 228) with a 9.525mm (3/8 inch) pitch. This is one of the most common metric roller chain standards. If you are unsure, measure the center-to-center distance between three consecutive pins and divide by two: the result should be 9.525mm. Do not use this sprocket with ANSI #35 chain (9.525mm pitch but different roller diameter and plate dimensions).
45# steel (GB/T 699 grade 45) is a medium-carbon steel with approximately 0.42–0.50% carbon content, comparable to AISI 1045. It offers a good balance of tensile strength (typically 600–800 MPa after heat treatment) and machinability. When hardened, the tooth flanks resist wear under cyclic chain loading. It is well-suited for moderate-duty industrial drives and is a standard material for roller chain sprockets in this pitch class.
Carbon steel sprockets are susceptible to surface oxidation in humid or wet environments. For outdoor or washdown applications, apply a chain lubricant regularly and consider a corrosion-inhibiting coating or grease. If your application requires inherent corrosion resistance, look for stainless steel or plastic sprocket alternatives. Routine lubrication of both the chain and sprocket is the most effective way to extend service life in any environment.
The bore diameter varies by tooth count and is listed in the variant details. Many sprockets in this class are supplied with a pilot bore that can be machined to a custom diameter and keyway by a local machine shop. If you need a specific bore size, contact us before ordering to confirm whether the selected tooth count can accommodate your shaft diameter.
Multi-packs (2, 3, or 5 pieces) are cost-effective when you need to replace both the driver and driven sprockets simultaneously — which is recommended whenever a chain is replaced, since mismatched wear accelerates chain stretch. They are also useful for stocking maintenance spares on production lines, building multi-stage chain drives, or outfitting multiple machines with the same sprocket specification.
A full buckle (also called a master link or connecting link) joins two open ends of a roller chain and includes an outer plate, two pins, and a clip. The 4PCS pack provides four complete connecting links. A half buckle (offset link) is used when the chain length requires an odd number of pitches — it offsets the chain by half a pitch to close the loop. The 2PCS half buckle pack provides two offset links. Choose based on whether your chain length is even (full buckle) or odd (half buckle) in pitch count.
