Roller chains

You don't order a chain by name. You order it by pitch, the center-to-center distance between two pins, and that is the first dimension that has to match the sprocket. Roller diameter, inside width between the plates and strand count come next. Those four values define the chain, whether or not you have a part number.

ASA / ANSI chains take their number from the pitch: ASA 35 has 9.52 mm from pin to pin, 40 has 12.7, 50 has 15.87, 60 has 19.05, 80 has 25.4, 100 has 31.75, and ASA 200 goes up to 63.5. A /2 or /3 means double or triple strand, and H means heavy (reinforced) plates, as in ASA 40, ASA 40/2, ASA 50H and ASA 35/3. You can get them in EMMAR and DONGHUA.

European BS chains are named differently (04-B1, 08-B1, 10-B1, 16-B1, 24-B1) and do not interchange with ANSI chain, even when the rollers look alike. Their specs include roller diameter and inside width: 8.51 and 7.75 mm for 08-B1, 15.88 and 17.02 mm for 16-B1. We quote them in TSUBAKI (RF06B, RF06B-1) and DIAMOND (DMD-08B0C, DMD-10B0C-2).

SKF PHC chains cover both standards, sold in 5-meter or 10-foot lengths, with connecting links (C/L) and offset links (O/L), in stainless, nickel-plated and zinc-plated versions. Look them up by the full PHC part number: PHC 04B-1C/L, PHC 04B-1DRX10FT, PHC 04B-1DRX5MTR.

In-house manufacturing. EMMAR, our own brand, covers ASA roller chains with up to six strands, and we also supply SKF, TSUBAKI, DIAMOND and DONGHUA chain. Send us on WhatsApp the pitch, inside width and length in links or meters, or the part number. When you are matching a worn chain, a photo with a caliper across it is enough.