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When a worn or corroding drive chain brings your conveyor line, agricultural equipment, or DIY power transmission project to a halt, you need a replacement that holds up under real working conditions. The 08B-1 roller chain is engineered for makers, maintenance technicians, and small-shop operators who cannot afford unexpected downtime caused by chain stretch or rust.
This 08B-1 single-strand roller chain features a 1/2" (12.7 mm) pitch and is constructed from 304 stainless steel throughout — inner plates, outer plates, pins, bushings, and rollers. Each standard length runs 1.524 m (approximately 60 inches / 5 feet), with multi-piece pack options available. Roller diameter is typically 7.75 mm (0.305 in) and inner plate height is typically 11.81 mm (0.465 in), consistent with ISO 606 / BS 228 08B-1 standards.
Typical use cases include light-to-medium conveyor systems requiring corrosion resistance, food-adjacent machinery where stainless contact surfaces are preferred, and custom DIY drivetrain builds such as go-karts, bike conversions, and workshop automation rigs where an 08B-1 half-inch pitch roller chain delivers precise, low-maintenance power transfer.
Manufactured to 08B-1 standard with 1/2" (12.7 mm) pitch, ensuring drop-in compatibility with any conforming sprocket without custom modification.
All load-bearing components — pins, bushings, rollers, and link plates — are 304 stainless steel, delivering strong resistance to oxidation, moisture, and mild chemical exposure.
08B-1 simplex configuration keeps weight low and installation straightforward, ideal for single-sprocket drive systems in compact machinery and DIY builds.
Each piece ships at the industry-standard 1.524 m length. Multi-piece packs are available so you can cover longer runs without field splicing multiple short sections.
Precision-formed link plates and hardened pins maintain pitch accuracy over extended service cycles, reducing the frequency of tension re-adjustment on your drive system.
Suited for conveyor lines, agricultural equipment, food-processing machinery, and custom workshop drivetrains — anywhere a corrosion-resistant 1/2" pitch roller chain is specified.
| Chain Standard | ISO 606 / BS 228 |
|---|---|
| Chain Number | 08B-1 |
| Strand Type | Simplex (Single Strand) |
| Pitch | 1/2" (12.7 mm) |
| Roller Diameter | 7.75 mm (0.305 in) |
| Inner Plate Height | 11.81 mm (0.465 in) |
| Pin Diameter | See variant options |
| Inner Width | See variant options |
| Material | 304 Stainless Steel |
| Finish | Natural Stainless (No Coating) |
| Length per Piece | 1.524 m (60 in / 5 ft) |
| Pack Quantity | See variant options |
| Weight | See variant options |
Check your sprocket's pitch marking — it should read 08B or 1/2". The 08B-1 chain has a 12.7 mm (1/2") pitch, which must match the sprocket pitch exactly. Also confirm the sprocket is rated for a single-strand (simplex) chain. If your sprocket is marked 08B-2 or 08B-3, you need a duplex or triplex chain instead.
304 stainless steel offers a good balance of tensile strength and corrosion resistance for light-to-medium duty drive applications. The minimum tensile strength of an 08B-1 chain per ISO 606 is typically around 17.8 kN. For heavy shock loads or very high-speed industrial drives, consult the rated working load for your specific variant before ordering.
304 stainless steel provides strong resistance to rust and oxidation in most wet, humid, and mildly corrosive environments. It is not fully immune to chloride-rich environments (such as saltwater or heavy chlorine exposure) — for those conditions, 316 stainless steel is typically recommended. For standard outdoor, food-adjacent, or washdown applications, 304 stainless performs reliably.
No — 08B-1 (ISO/BS standard) and ANSI #40 are both 1/2" pitch chains but they are not interchangeable. The roller diameter, inner width, and plate dimensions differ between the two standards. Always match your chain to the sprocket standard (ISO/BS 08B or ANSI #40) rather than pitch alone.
Use a standard 08B-1 connecting link (also called a master link) that matches the ISO 606 / BS 228 specification. The connecting link includes an outer plate, a clip or cotter pin, and two pins. Ensure the clip's open end faces away from the direction of chain travel for secure retention. Connecting links are sold separately.
Measure the center distance between your drive and driven sprockets, then use the standard chain length formula: L (links) = 2C/p + (N+n)/2 + p(N−n)²/(4π²C), where C is center distance, p is pitch, N and n are the tooth counts of the two sprockets. Each piece in this listing is 1.524 m (60 in). Select a multi-piece pack if your calculated length exceeds one piece to minimize field splicing.
Yes — even stainless steel roller chains benefit from periodic lubrication to reduce pin-bushing wear and extend service life. Apply a light machine oil or chain-specific lubricant to the inner link area every 50–100 operating hours, or more frequently in dusty or high-load conditions. Avoid heavy grease in food-adjacent applications; use food-grade lubricant where required.
