EMMAR 04-B1 roller chain

EMMAR 04-B1 belongs to roller chain, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 04-B1 and any equivalents.

For drives where a standard chain is simply too large, the BS 04-B1 roller chain offers a compact solution. With a 4 mm roller and 2.8 mm inner width, it fits precision mechanisms, small automation, and light transmission tasks. MR supplies this chain as part of its power transmission range, along with the sprockets and lubricants needed to complete the assembly.

The code 04-B1 follows the European BS standard. The 04 indicates the size series, while B1 means a single strand: one row of plates and rollers. The published dimensions are a roller diameter of 4 mm and an inner width of 2.8 mm, placing it among the smallest chains in this standard. For pitch, link count, or working load, refer to the manufacturer's data sheet for the exact code.

You will find this chain in applications that require synchronized motion in tight spaces: feed mechanisms in desktop equipment, measuring devices, miniature conveyors, light automatic doors, and laboratory prototypes. It also appears in small machine tools and in drives where the short pitch allows higher ratios without adding bulk. It is not intended for heavy power transmission or highly abrasive environments.

When selecting a replacement, confirm that the pitch and inner width match your sprocket. Small-pitch chains demand precise sprocket alignment; any angular or parallel misalignment will accelerate wear on rollers and plates. Lubrication should be a fluid type that reaches the bushings and is applied often. Set tension according to the equipment builder's recommendation, avoiding an overly tight chain.

If you need an equivalent, send the complete code, a photo of the chain, and if possible the measured pitch and inner width. With that information we can identify the correct BS variant or suggest the next larger section if space permits. Also let us know whether the chain runs on its existing sprocket or if a complete set is required, so we can avoid mismatches in pitch or width.

MR supplies BS chains and also manufactures ANSI chains, sheaves, and split plummer block housings. If you have the code 04-B1 ready, send it via WhatsApp with the quantity and length you need. Our team will review your request and reply with a quote.