Description
28B Metric Roller Chain Sprocket — Maximum Load Heavy Industrial Drives
The 28B at 44.45mm (1-3/4 inch) pitch is specified when the largest ISO metric chain loads are required. Used in dredging equipment, steel mill rolling drives, large-scale mining conveyors, and heavy port machinery. Available in simplex (28B-1) and duplex (28B-2) from 9 to 76 teeth. C45 or 4140 alloy steel.
Specifications
| 范围 | 28B-1 | 28B-2 |
|---|---|---|
| 沥青 | 44.45 mm (1-3/4″) | 44.45 mm |
| Roller Dia. | 27.94 mm | 27.94 mm |
| Internal Width | 30.99 mm | 30.99 mm |
| 牙齿 | 9 – 76T | 9 – 57T |
| 材料 | C45 / 4140 | C45 / 4140 |
Features
▶ Largest commonly specified ISO metric pitch — for applications beyond 24B capacity
▶ 4140 alloy steel standard for mining — handles extreme shock and fatigue loading
▶ Induction hardened HRC 40-50 — critical for abrasive heavy-industry environments
▶ Split hub and segmental rim for field replacement on large-scale equipment
▶ Bores up to 130mm+ with QD bushings on larger tooth counts
▶ ISO 9001 certified, EN 10204 Type 3.1 material traceability
Applications
🏭 Large mining overland conveyors, dredging chain drives, steel mill coil handling
⚓ Heavy port ship-loaders, bulk terminal conveyor drives, quayside crane mechanisms
Reviews
“28B duplex on our dredger chain drive. Handles the shock loads from bucket filling without issues.” ★★★★★
Marine Engineer, Darwin, Australia
“Custom bore 28B-1 for our steel mill. 4140 steel with material cert. Excellent quality.” ★★★★★
Rolling Mill Manager, Jamshedpur, India
“Heavy-duty 28B for our port conveyor. Running well under salt-spray coastal conditions with zinc-nickel plating.” ★★★★☆
Port Operations, Brisbane, Australia
“Segmental rim 28B for our bucket elevator. Rim change during shutdown saved significant time.” ★★★★★
Maintenance Superintendent, Antofagasta, Chile
“Consistent heavy-duty sprocket supply from Ever-Power. Used across multiple sites.” ★★★★★
Group Procurement, Perth, Australia
FAQ
28B vs ANSI #140?
Is triplex available?
Max bore?
Surface treatment for marine?
MOQ?
28B Chains
QD Bushings
✅ ISO 9001:2015 ✅ ISO/R 606 ✅ DIN 8187 ✅ EN 10204 Type 3.1
Ever-Power Australia: 15+ years, 3,200+ SKUs, full CNC manufacturing, engineering support, OEM capability.
