Product Overview
UHMWPE sprockets are precision-machined, high-performance components designed for material handling conveyors and chain-driven machinery. They provide an optimal alternative to metal sprockets, featuring low friction, high wear resistance, noise reduction, and excellent chemical stability.
Technical Specifications
|
Parameter |
Standard Value / Range |
|
Material Base |
Ultra-High Molecular Weight Polyethylene |
|
Density |
0.93–0.96 g/cm³ |
|
Shore Hardness |
Shore D 62–66 |
|
Tensile Strength |
20–40 MPa |
|
Elongation at Break |
300–600% |
|
Water Absorption |
≤ 0.01% |
|
Dynamic Coefficient of Friction |
0.10–0.20 |
|
Continuous Service Temp. |
-100°C to +80°C |
|
Standard Machining Tolerance |
ISO 2768-m (up to ±0.05 mm) |
Key Performance Advantages
Reduced Chain & Sprocket Wear: Low dynamic friction minimizes contact wear on both the chain rollers and sprocket tooth flanks, extending overall drive system life.
Weight Reduction & Energy Savings: Weighing less than 15% of steel equivalents, UHMWPE reduces rotating mass, startup torque, and power consumption.
Washdown & Chemical Immunity: Resists rust, acids, alkalis, and cleaning chemicals, making it suitable for aggressive washdown environments.
Quiet & Clean Operation: Absorbs mechanical shock and vibration, lowering ambient factory noise levels without requiring external lubricants.
Application Fields
Food & Beverage Processing
Bottling, canning, bakery, poultry, and meat processing conveyors exposed to constant moisture and washdown chemicals.
Packaging Machinery
Drive and idler sprockets for case packers, cartooning systems, shrink wrappers, and high-speed sorting conveyors.
Material Handling & Logistics
Distribution center sorting lines, pallet transfer systems, roller conveyor chain drives, and bin transfer units.
Water & Wastewater Treatment
Sludge collectors, grit removal conveyors, and drive mechanisms operating continuously submerged in corrosive fluids.
Material Grade Options
Standard Virgin UHMWPE: Ideal for general conveyor systems requiring low friction, high impact strength, and solid wear resistance.
Food-Contact Grade: Formulated for direct and indirect food contact in primary food processing and sanitary packaging equipment.
UV-Stabilized Grade: Formulated with light stabilizers to resist outdoor weathering, degradation, and embrittlement from prolonged sunlight exposure.
Anti-Static / Conductive Grade: Controls electrical resistance to prevent static charge buildup in explosion-proof zones or electronics manufacturing lines.
Custom Machining Capabilities
Keyed Bores & Finished Hubs: Machined to exact shaft sizes, featuring standard single/double keyways, set-screw holes, or custom spline profiles.
Precision Tooth Geometry: Custom tooth profiles cut to precise pitches (ANSI, ISO, or non-standard pitch standards) for roller chains, tabletop chains, and modular belts.
Mounting Feature Integration: Custom bolt hole circles, counterbores, hub recesses, lightened web designs, and deburred chamfers built to drawing specs.
Reverse Engineering Support: Dimensions and tooth profiles can be established directly from physical sample parts, chain samples, or basic shaft layouts.
Manufacturing Process
Specification Review
Technical evaluation of CAD drawings, samples, or chain and shaft measurements.
01
Material Preparation
Selection of high-grade UHMWPE stock shapes (sheets/rods) and stress-relieving pre-treatment.
02
CNC Machining
Precision CNC turning and milling of outer profile, tooth geometry, bore, and keyway features.
03
Precision Finishing
Deburring, edge chamfering, and surface cleaning to ensure smooth chain engagement.
04
Quality Inspection
Full dimensional check, bore-to-tooth concentricity inspection, and drawing verification.
05
Quality Control
Dimensional Inspection: Verification of critical dimensions, including pitch diameter, root diameter, bore size, and keyway tolerances.
Tooth Profile Accuracy: Inspection of tooth pitch and geometry to guarantee smooth, binding-free chain tracking.
Concentricity Control: Strict management of bore-to-tooth alignment to eliminate runout, vibration, and premature wear.
Traceability & Repeat Orders: Production specifications and CNC programs are archived for quick re-ordering and consistent quality.
FAQ
Q: What information is needed for a quotation?
A: Provide the chain pitch, tooth count, bore diameter, thickness, keyway dimensions, quantity, and drawing when available.
Q: Can a sprocket be made from an existing part?
A: Yes. An existing sprocket can be used as a dimensional reference when the original drawing is unavailable.
Q: Can the sprocket match an existing conveyor chain?
A: Yes. Chain pitch, tooth profile, tooth count, thickness, and related dimensions can be reviewed before machining.
Q: Can the bore and keyway be customized?
A: Yes. Bore diameter, keyway size, hub dimensions, and mounting features can be produced according to the shaft and assembly requirements.
Q: Can the same sprocket be reproduced for repeat orders?
A: Yes. Approved drawings and production specifications can be retained as references for repeat production.
Q: What if only basic dimensions are available?
A: Basic dimensions, chain information, photographs, or an existing component can provide a starting point for technical review. A complete drawing is preferred for complex parts.
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