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When a standard roller chain isn't enough and you need secure attachment points for conveyor flights, brackets, or fixtures, finding a chain that combines drive strength with built-in mounting ears is a real challenge. The 08B-1 Simplex Roller Chain with Double Bent Ears is engineered for engineers, maintenance technicians, and DIY builders who need a dependable European-standard chain that does double duty — transmitting power and anchoring attachments simultaneously.
This chain is built to the BS/ISO 08B-1 European standard with a 12.7mm (1/2 inch) pitch and a working length of 1.524m (approximately 5 feet / 60 inches). The double bent attachment ears are evenly spaced along the chain, providing fixed mounting tabs without requiring separate attachment links. Constructed from carbon steel with precision-ground components, the chain delivers consistent tensile strength across its full length.
Typical use cases include light conveyor systems for agricultural machinery, automated feeding equipment, and small-scale industrial drive assemblies — all applications where long-tail searches like "08B attachment chain with bent ears," "European standard conveyor roller chain 12.7mm," and "BS roller chain with mounting tabs" are common. Whether you're building a seed drill drive, a parts-transfer conveyor, or a custom automation rig, this chain fits the bill.
| Standard | BS/ISO 606 European Standard (08B-1) |
|---|---|
| Chain Type | Simplex (Single Strand) |
| Pitch | 12.7mm (1/2") |
| Length | 1.524m (~5 ft / 60 in) |
| Roller Diameter | 8.51mm (0.335") |
| Inner Width | 7.75mm (0.305") |
| Plate Height | See variant options |
| Attachment Type | Double Bent Ears (K2 style) |
| Ear Spacing | See variant options |
| Material | Carbon Steel |
| Finish | Natural / Lightly Oiled |
| Tensile Strength | Typically 17.8 kN (min.) |
| Weight (per unit) | Approx. 0.8 kg |
08B-1 follows the BS/ISO 606 European standard with a 12.7mm pitch. While ANSI #40 also has a 12.7mm pitch, the two standards differ in roller diameter, inner width, and plate dimensions — they are not interchangeable. Always match your chain to your sprocket's standard (BS/ISO or ANSI) before ordering.
Double bent ears (also called K2 attachments) are extended, bent side plates on select links that protrude outward on both sides of the chain. They provide a flat mounting surface with pre-drilled or drillable holes for bolting conveyor flights, brackets, or fixtures directly to the chain. No separate attachment links are needed.
At a 12.7mm pitch, 1.524m equals 120 pitches (links). This is a standard chain length. If you need a different number of links, the chain can be cut with a chain breaker tool and rejoined using a standard 08B-1 connecting link (sold separately).
The chain is manufactured from carbon steel with a light oil coating for corrosion inhibition during storage and transit. For prolonged outdoor or wet-environment use, we recommend regular lubrication with a chain-specific grease or oil, or consider a stainless steel variant if corrosion resistance is a primary requirement. Contact us to confirm stainless options.
This chain is compatible with any sprocket manufactured to the BS/ISO 606 08B-1 standard with a 12.7mm pitch. Verify that your sprocket is rated for BS/ISO (not ANSI) before installation. Common tooth counts for this pitch range from 9T to 60T depending on your drive ratio requirements.
Yes. Standard 08B-1 connecting links (also called master links) can be used to join two chain lengths end-to-end. Ensure the connecting link is rated for 08B-1 BS/ISO standard. If your application forms a closed loop, you will also need to account for an even total link count to allow proper joining.
Use the standard chain length formula: L = (2C/P) + (N1+N2)/2 + ((N2-N1)/2π)² × (P/C), where C is center distance, P is pitch, and N1/N2 are sprocket tooth counts. Round up to the nearest even number of links. If you need help sizing your drive, contact us with your center distance and sprocket sizes.
