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When a worn or snapped drive chain brings your machinery, conveyor, or small-engine equipment to a halt, finding an exact-pitch replacement fast is critical. The 06B-1 roller chain is the go-to solution for engineers, repair technicians, and serious DIYers who need a dependable single-strand chain in the widely used 3/8" (9.525 mm) pitch standard.
This listing covers the 06B-1 single-strand roller chain conforming to ISO 606 / BS 228 standards. The chain features a pitch of 9.525 mm (3/8"), a roller diameter of approximately 6.35 mm (0.25"), and an inner width of approximately 5.72 mm (0.225"). Available in lengths from 1.524 m (5 ft) and sold by the piece or in multi-pack quantities to suit your project scale.
Typical applications include small agricultural machinery drive systems, light industrial conveyor lines, go-kart and mini-bike final drives, and general-purpose power transmission on compact gearboxes. Whether you are replacing a worn chain on a seed drill, building a custom chain-drive robot, or maintaining a production conveyor, the 06B-1 pitch roller chain delivers consistent engagement and long service intervals.
| Chain Standard | ISO 606 / BS 228 |
|---|---|
| Chain Type | Single-Strand Roller Chain (06B-1) |
| Pitch | 9.525 mm (3/8") |
| Roller Diameter | Approx. 6.35 mm (0.25") |
| Inner Width | Approx. 5.72 mm (0.225") |
| Minimum Breaking Load | ≥ 9.0 kN (typical for 06B-1) |
| Material | Carbon steel with surface treatment |
| Finish | Zinc-phosphate or equivalent |
| Available Lengths | See variant options |
| Pack Quantity | See variant options |
| Compatible Sprocket | 06B-1 sprockets (ISO 606 / BS 228) |
Check the pitch marking on your existing chain or sprocket. This chain uses a 9.525 mm (3/8") pitch and is a single-strand (06B-1) design. If your sprocket is stamped or labeled 06B or 06B-1 and conforms to ISO 606 / BS 228, this chain will fit directly.
Measure the center distance between your drive and driven sprockets, then calculate the required chain length using the standard chain-length formula: L = 2C + (N₁ + N₂)/2 + (N₂ − N₁)²/(4π²C), where C is center distance in pitches. Select the available length option closest to your calculated requirement and trim to fit using a chain breaker tool.
The 06B-1 standard specifies a minimum breaking load of approximately 9.0 kN. This makes it suitable for light-to-medium duty power transmission applications such as small conveyors, agricultural equipment, and compact engine drives. For heavy industrial loads, consider upgrading to a larger pitch chain (e.g., 08B-1 or 10B-1).
The chain carries a zinc-phosphate or equivalent surface treatment that provides moderate corrosion resistance suitable for sheltered outdoor or workshop environments. For prolonged exposure to rain, salt spray, or chemical environments, apply a chain lubricant regularly or consider a stainless-steel variant for your application.
Yes. Standard 06B-1 connecting links (also called master links) are available separately and allow you to join two chain lengths or close a loop. Ensure you use a connecting link rated for 06B-1 (9.525 mm pitch) to maintain the chain's rated strength.
For best service life, apply a dedicated chain lubricant or SAE 30–40 mineral oil to the inner plates and rollers during installation and at regular maintenance intervals. Avoid thick greases that attract abrasive particles. In high-speed applications, consider a drip or bath lubrication system.
Use a roller chain breaker tool sized for 06B-1 chain. Position the chain in the tool, align the punch with the pin you want to remove, and press the pin out. Count links carefully before cutting — each link adds one pitch (9.525 mm) to the total length. Always cut to an even number of links when possible to avoid needing an offset link.
