Description
Medium-to-heavy load large-roller double-pitch stainless sprockets β step up from SUS2050SB capacity while keeping the double-pitch architecture’s conveyor weight and cost advantages.
SUS2050RB β Medium-to-Heavy Load Double-Pitch Stainless
The SUS2050RB is the medium-tier RB-type (large roller) double-pitch stainless sprocket, designed for No.2050R chain β the large-roller variant of the 31.75 mm double-pitch chain family. Its roller diameter is 19.05 mm, which corresponds to the roller diameter of the standard No.100 chain, making the SUS2050RB tooth profile geometrically identical to a standard 100-series sprocket tooth. This large roller provides higher rated working load than the No.2050S small-roller chain, giving the SUS2050RB a meaningful capacity advantage over its SB-type counterpart at the same 31.75 mm pitch.
The RB naming convention identifies large-roller double-pitch sprockets throughout the JIS B1801 standard: the 2040RB uses No.80-class rollers, the 2050RB uses No.100-class rollers, and the 2060RB uses an even larger heavy roller. This scaling pattern allows conveyors to step up in load capacity by upgrading from SB to RB chain at the same pitch, without any change to centre distance, chain length, or shaft positions β only the chain and sprocket family changes. For food, pharmaceutical, and chemical industry applications where stainless steel sprocket construction is mandatory and the SUS2050SB is approaching its load limit, the SUS2050RB delivers the required capacity step.
All four standard SUS2050RB tooth counts (10T, 11T, 12T, 13T) use integer designations β not the fractional half-integer notation of SB-type sprockets β because the large roller’s engagement geometry produces standard whole-number pitch circle relationships. Hub geometry is consistent across all four sizes: BD=73 mm, BL=28 mm, and maximum bore 48 mm. Hangzhou Ever-Power machines these from solid 304 stainless bar with CNC hobbing, H7 bore tolerance, and 100% CMM dimensional verification.
Chain Parameters & Dimensional Specifications
| Type | Teeth | OD Do (mm) | PCD Dp (mm) | Stock Bore | Min. Bore | Max. Bore | Hub BD | Hub BL | Wt. (kg) |
|---|---|---|---|---|---|---|---|---|---|
| SUS2050RB | 10 | 116 | 102.75 | 16 | 18 | 48 | 73 | 28 | 1.10 |
| SUS2050RB | 11 | 127 | 112.70 | 16 | 18 | 48 | 73 | 28 | 1.20 |
| SUS2050RB | 12 | 138 | 122.67 | 18 | 20 | 48 | 73 | 28 | 1.30 |
| SUS2050RB | 13 | 148 | 132.67 | 18 | 20 | 48 | 73 | 28 | 1.50 |
Manufacturing for Large-Roller Double-Pitch Geometry
Industry Applications
Heavy-Load Food Conveyors
Production-scale meat processing, large dairy lines, and industrial seafood handling operate at product loads that exceed the No.2050S capacity. SUS2050RB handles these loads at 31.75 mm double pitch with full HACCP-compliant stainless construction throughout the drive system.
Chemical Plant Transfer Lines
IBC and drum transfer conveyors in specialty chemical manufacturing face acid vapour and solvent exposure continuously. The RB-type capacity covers the mechanical requirements while 304 stainless eliminates the corrosion maintenance cycle on chemical plant conveyor drives.
Aquaculture & Marine Conveyors
Fish and crustacean processing conveyors in saline environments need load capacity and corrosion resistance simultaneously. SUS2050RB provides both without the dead-weight penalty of single-pitch stainless chain at equivalent rated capacity on long conveyor runs.
Heavy Packaging Machinery
Palletisers, case erectors, and stretch-wrap systems in food-zone packaging areas use stainless chain drives for full-case conveying loads. The RB type handles these loads within the compact double-pitch architecture.
Waste & Recycling Transport
Long-run sorting conveyors in food waste and organic recycling plants face aggressive decomposition atmospheres. RB-type capacity and stainless construction together address both the mechanical and environmental requirements of these installations.
Greenhouse Cultivation Systems
Automated plant-basket conveyors in commercial greenhouse operations carry heavier basket loads than the SB type allows. SUS2050RB handles these loads while stainless construction prevents rust contamination of growing substrate and irrigation water.
Custom Bore & OEM Configurations
π Standard Bore H7
Up to 48 mm, H7 tolerance. DIN 6885 keyway and set-screw on request. 3β7 day lead time.
π§ Non-Standard Keyway
Woodruff, wide-key, or non-DIN profiles from customer drawing. No additional lead time for most profiles.
π Extended Hub
Hub BL beyond 28 mm for cantilevered shaft clearance. Minor extensions without drawing sign-off.
π·οΈ OEM Marking
Customer part numbers or brand by laser. EN 10204 3.1 material certificates on request.
Why Choose Hangzhou Ever-Power for SUS2050RB
Dedicated 2050R Tooling: No.2050R hob (19.05 mm roller geometry) maintained in production inventory. No tooling procurement delay on SUS2050RB orders.
100% CMM Verification: PCD, bore, and hub runout measured on every part before dispatch. Ensures the 31.75 mm double-pitch circle is correctly generated for each of the four tooth counts.
Material Certificates: EN 10204 3.1 mill test certificates on request for food, pharma, and chemical sector procurement compliance.
Engineering Support: Selection guidance between SUS2050SB and SUS2050RB, load calculation review, and bore sizing confirmation within one business day.
