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Side Bow Roller Chains — SB Series & British Standard
ANSI 40SB · 43SB · 50SB · 60SB · 63SB · 80SB | BS 06BSBF1 · 08BSB · 08BSBF1 · 10BSB · 12BSB · 16BSB | Heavy-duty #C2050SB · #C2060SBF1 · #C2062F6SB
✓ Tensile strength 8.0–55.6 kN
✓ ISO / ANSI sprocket compatible
✓ Stainless & custom variants available
✓ Bi-directional lateral travel
Side bow roller chains are engineered for horizontal curved conveyor paths. Unlike conventional drive chains optimised purely for linear rigidity, SB series chains incorporate deliberate internal clearances and modified link-plate geometries that allow the chain to negotiate tight bends smoothly — eliminating the need for auxiliary transfer mechanisms, radius sprockets, or segmented conveyor sections.
Our range spans ANSI and British Standard series covering pitches from 9.525 mm (#06BSBF1) up to 38.100 mm (#C2062F6SB), with minimum bend radii from 300 mm to 1,100 mm and tensile strengths from 8.0 kN to 55.6 kN. Carbon steel is standard; stainless 304/316 and attachment-plate variants are available to order.
Bi-directional flex
Deflects left or right without preferential orientation — simplifies layout in complex serpentine routing.
Continuous motion
Eliminates dead zones at conveyor junctions, reducing product damage and inter-transfer maintenance.
Standard sprockets
Tooth profiles unchanged from base roller chain standard — no bespoke wheel geometries needed on straight-run sections.
High pretension build
Mitigates initial elongation, extending re-tensioning intervals and maintaining pitch accuracy through service life.
Washdown & food-grade
304/316 stainless variants available for food processing, beverage, and pharmaceutical environments.
Custom configurations
Extended pins for plastic flights, F1/F6 attachment plates, coated and hardened variants to specification.
How side bow chains achieve lateral flexibility
Option A — Conical pin
The pin tapers subtly within the bushing bore, permitting angular displacement in the horizontal plane. Cost-effective for moderate-speed, lighter-duty curved runs. Modest compromise in long-term pitch precision under sustained high-velocity cycles.
Option B — Loose cylindrical pin (preferred)
Deliberately loosened clearance between cylindrical pin and bushing. Superior fatigue resistance, more predictable elongation behaviour, and significantly longer service life — the preferred choice for sustained high-speed industrial duty.
Typical application industries
Food & beverage processing
Automotive assembly
Pharmaceutical packaging
Postal / logistics sortation
Overhead serpentine conveyors
Modular assembly lines
Full specifications — SB series side bow roller chains
Dimensions in mm · Q min = minimum ultimate tensile strength (kN / lbf) · Q₀ = average tensile strength (kN) · R = minimum side bow radius (mm) · # = straight side plates
| Zincir No. | Pitch P (mm) |
Roller ⌀ d₁ max (mm) |
Inner width b₁ min (mm) |
Pin ⌀ d₂ max (mm) |
Pin length (mm) | Plate depth h₂ max (mm) |
Plate thick. t/T max (mm) |
Bow radius R (mm) |
Tensile str. Q min (kN/lbf) |
Avg. tensile Q₀ (kN) |
Ağırlık q (kg/m) |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L max | Lc max | |||||||||||
| ANSI SB SERIES | ||||||||||||
| 40SB | 12.700 | 7.95 | 7.85 | 3.96 | 16.9 | 18.1 | 11.7 | 1.50 | 350 | 13.8 / 3,136 | 15.20 | 0.80 |
| 43SB | 12.700 | 7.95 | 7.85 | 3.45 | 18.3 | 19.5 | 11.7 | 1.50 | 305 | 12.0 / 2,727 | 13.20 | 0.64 |
| 50SB | 15.875 | 10.16 | 9.40 | 4.37 | 20.7 | 22.7 | 14.9 | 2.03 | 400 | 20.6 / 4,681 | 22.70 | 1.09 |
| 60SB | 19.050 | 11.91 | 12.57 | 5.34 | 26.6 | 28.4 | 18.0 | 2.42 | 500 | 15.7 / 3,568 | 17.30 | 1.54 |
| 63SB | 19.050 | 11.91 | 12.68 | 5.08 | 28.8 | 30.6 | 17.2 | 2.42/2.03 | 350 | 12.5 / 2,840 | 20.00 | 1.40 |
| 80SB | 25.400 | 15.88 | 15.75 | 7.19 | 34.0 | 37.3 | 24.0 | 3.25 | 711 | 40.9 / 9,201 | 42.00 | 2.60 |
| BRITISH STANDARD (BS) VARIANTS | ||||||||||||
| #06BSBF1 | 9.525 | 6.35 | 5.72 | 3.05 | 13.5 | 15.0 | 8.2 | 1.30 | 300 | 8.0 / 1,818 | 8.80 | 0.60 |
| 08BSB | 12.700 | 8.51 | 7.75 | 3.97 | 17.4 | 18.7 | 11.8 | 1.60 | 400 | 14.0 / 3,182 | 15.40 | 0.70 |
| 08BSBF1 | 12.700 | 8.51 | 7.75 | 3.97 | 16.3 | 17.6 | 11.8 | 1.6/1.2 | 400 | 12.8 / 2,909 | 14.10 | 0.65 |
| 10BSB | 15.875 | 10.16 | 9.65 | 4.50 | 20.1 | 21.5 | 14.7 | 1.70 | 400 | 15.6 / 3,545 | 17.20 | 0.93 |
| 12BSB | 19.050 | 12.07 | 11.68 | 5.12 | 23.1 | 24.8 | 16.0 | 1.85 | 500 | 20.5 / 4,658 | 22.60 | 1.16 |
| 16BSB | 25.400 | 15.88 | 17.22 | 7.90 | 36.5 | 39.7 | 21.0 | 3.7/3.0 | 500 | 55.6 / 12,635 | 64.00 | 2.53 |
| HEAVY-DUTY / AGRICULTURAL CONVEYOR VARIANTS (# straight side plates) | ||||||||||||
| #C2050SB | 31.750 | 10.16 | 9.40 | 5.08 | 21.3 | 22.6 | 15.0 | 2.03 | 800 | 21.8 / 4,954 | 24.00 | 0.84 |
| #C2060SBF1 | 38.100 | 11.91 | 12.57 | 5.08 | 26.8 | 28.8 | 18.0 | 2.42 | 800 | 21.8 / 4,954 | 24.00 | 1.17 |
| #C2062F6SB | 38.100 | 22.23 | 12.57 | 5.34 | 26.6 | 29.0 | 23.0 | 2.42 | 1100 | 15.7 / 3,568 | 17.30 | 2.27 |
Selection guide — four inputs required
Curve radius
Your tightest bend must be ≥ the chain’s R value. Tighter curves require a smaller R model.
Must match existing or planned sprocket tooth spacing. Confirm ISO or ANSI standard.
Working load
Apply a minimum 5:1 safety factor against Q min for dynamic conveyor duty cycles.
Çevre
Carbon steel for dry/lightly lubricated indoor use. Stainless 304/316 for washdown, food-contact, or high-humidity service.
Request a quote or technical datasheet
Roller Chain Manufacturers — supplying SB series chains to OEM conveyor builders, food processing plants, and MRO distributors worldwide. Standard lengths, stainless options, and attachment variants available.
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