British Standard roller chain, from UK stock
06B to 24B in simplex, duplex and triplex, plus stainless steel and hollow-pin variants, cut to your exact length. Order by 1pm for same-day dispatch.
Cut to your exact pitch count, links fitted
We hold the popular sizes (08B-1, 10B-1 and 12B-1) in bulk coils of 150 ft and more. Tell us the length or pitch count your machine needs and we supply the chain made up, not a box and a hacksaw:
- Cut to the exact number of pitches, advised or measured from your old chain
- Connecting link fitted, with a cranked link for odd pitch counts
- Bagged, labelled with your reference, and repeatable on reorder
A chain joined at the wrong count means a return visit to the machine. We hold your made-up spec against your account, so the next one is a phone call: same chain, same length, next day.
Availability by size and variant
Manufactured for us in our partners' ISO 9001:2015-certified factories. Attachment versions (A1, K1, SA1, SK1, WA2, WSK2 and more), straight-plate (GL) versions and connecting links available across the stocked sizes. Every size also has its own page — 08B, 12B, 16B and the rest — or see the full size chart. Unsure on spring clip vs cotter, or odd pitch counts? Read links, lengths & pitch counts.
| Size (pitch) | Simplex | Duplex | Triplex | Stainless steel (simplex) | Stainless steel (duplex) | Hollow pin | Hollow pin, stainless steel |
|---|---|---|---|---|---|---|---|
| 06B (3/8″) | UK stock | UK stock | Enquire | UK stock | UK stock | Enquire | Enquire |
| 08B (1/2″) | UK stock | UK stock | Enquire | UK stock | To order | UK stock | UK stock |
| 10B (5/8″) | UK stock | UK stock | Enquire | UK stock | Enquire | Enquire | To order |
| 12B (3/4″) | UK stock | UK stock | UK stock | UK stock | UK stock | Enquire | To order |
| 16B (1″) | UK stock | UK stock | Enquire | UK stock | UK stock | Enquire | Enquire |
| 20B (1¼″) | UK stock | UK stock | UK stock | To order | To order | Enquire | Enquire |
| 24B (1½″) | UK stock | UK stock | To order | To order | To order | Enquire | Enquire |
| 05B (8 mm) | Enquire | Enquire | Enquire | Enquire | Enquire | Enquire | Enquire |
Dimensions & breaking loads
Simplex chain data for the British Standard (ISO 606 "B") range. Measure your chain against these to confirm the size.
| Chain | Pitch (mm) | Inner width (mm) | Roller Ø (mm) | Plate height (mm) | Pin Ø (mm) | Min breaking load kgf | Weight (kg/m) |
|---|---|---|---|---|---|---|---|
| 05B | 8.00 | 3.00 | 5.00 | 7.11 | 2.31 | 449 (4.4 kN) | 0.16 |
| 06B | 9.525 | 5.72 | 6.35 | 8.26 | 3.28 | 908 (8.9 kN) | 0.39 |
| 08B | 12.70 | 7.75 | 8.51 | 11.81 | 4.45 | 1,816 (17.8 kN) | 0.65 |
| 10B | 15.875 | 9.65 | 10.16 | 14.73 | 5.08 | 2,265 (22.2 kN) | 0.92 |
| 12B | 19.05 | 11.68 | 12.07 | 16.13 | 5.72 | 2,949 (28.9 kN) | 1.24 |
| 16B | 25.40 | 17.02 | 15.88 | 21.08 | 8.28 | 6,122 (60.0 kN) | 2.65 |
| 20B | 31.75 | 19.56 | 19.05 | 26.42 | 10.19 | 9,694 (95.1 kN) | 3.85 |
| 24B | 38.10 | 25.40 | 25.40 | 33.40 | 14.63 | 16,327 (160.1 kN) | 7.60 |
BS and ANSI chains share several pitches but differ in roller diameter and plate proportions. Breaking loads are the ISO 606 standard minimums; other figures are nominal standard dimensions. Duplex and triplex share the same pitch, roller and plate dimensions; multi-strand widths, transverse pitches and attachment platform dimensions on request. Verifying an unknown chain? Read how to identify a roller chain.
Know the size and length you need?
Send the chain number and pitch count, or the worn chain itself, and we'll quote it the same day.