08B roller chain
1/2″ pitch (12.70 mm), minimum breaking load 1,816 kgf (17.8 kN), cut to your exact pitch count with the connecting link fitted, from our Malvern warehouse.
Held in UK stock as simplex, duplex, stainless steel (simplex) and more; same-day dispatch on stocked variants ordered by 1pm.
08B dimensions
Standard minimums and nominal dimensions: the same figures as our BS roller chain range table. Duplex and triplex share the pitch, roller and plate dimensions of the simplex chain.
| Chain | Pitch (mm) | Inner width (mm) | Roller Ø (mm) | Plate height (mm) | Pin Ø (mm) | Min breaking load kgf | Weight (kg/m) |
|---|---|---|---|---|---|---|---|
| 08B-1 | 12.70 | 7.75 | 8.51 | 11.81 | 4.45 | 1,816 (17.8 kN) | 0.65 |
Availability by variant
| Variant | Availability |
|---|---|
| Simplex | UK stock |
| Duplex | UK stock |
| Triplex | Enquire |
| Stainless steel (simplex) | UK stock |
| Stainless steel (duplex) | To order |
| Hollow pin | UK stock |
| Hollow pin, stainless steel | UK stock |
Sizes marked "Enquire" feed our bespoke service — special requirements are normal work here.
08B variants and builds
- Attachment versions — A, K, SA and SK platforms built to your spacing in Malvern
- Straight-plate version (08BGL) — flat side bars for surfaces that slide, same sprockets
- Hollow-pin version (08BHP) — bored pins for rods, spindles and fixings
- Matched sprockets — pilot bore, taper lock and finished bore to suit 08B
Pitch, roller diameter and inner width name almost any roller chain: the identification guide shows where to measure, and the BS–ANSI cross-reference catches lookalike sizes.
Straight answers
Will 08B chain run on my existing sprockets?
Yes: 08B is a standard British Standard (ISO 606) size, so any chain made to the standard runs on 08B sprockets. Simplex, duplex and triplex share the same pitch and roller diameter; a multi-strand chain just needs the matching multi-strand sprocket, which we supply machined to our specification.
What length can I order 08B chain in?
Any length: we cut to your exact pitch count and fit the connecting link, with a cranked link for odd counts, so the chain arrives ready to fit. 08B-1 is held in bulk coils of 150 ft and more for made-to-measure supply, and your spec stays on file for repeat orders.
How do I check a chain I have is 08B?
Measure the pitch (pin centre to pin centre, 12.70 mm for 08B), the roller diameter (8.51 mm) and the inner width (7.75 mm). Our chain identification guide shows the three measurements, and a photo with a tape measure in shot settles anything unusual.
Is there a ANSI equivalent of 08B?
Sometimes chains of the two standards share a pitch but differ in roller diameter or width, so they are not automatically interchangeable. Check the BS–ANSI cross-reference guide before substituting, or send us both designations and we will confirm.
Need 08B chain cut to length?
Send the pitch count or the old chain's length and we'll quote it made up, links fitted, with sprockets to match.