PU Buffers
High-energy absorption polyurethane buffer stops engineered for crane runway end stops, automated warehouse stacker cranes, elevator counterweight pits, and port container equipment. Features microcellular or solid cast elastomeric structures that progressively absorb massive kinetic impacts.
Types & Configurations of PU Buffers
Microcellular PU Crane Buffers
High-compression cellular polyurethane buffers offering small installation length and large deceleration stroke.
Solid Cast Polyurethane Bumpers
High-density cylindrical or conical buffers for heavy mining car stops and forge equipment.
Flanged Elevator Counterweight Buffers
Certified safety buffers absorbing passenger elevator cab emergency over-travel.
Stacker Crane High-Speed Buffers
Engineered buffers designed for automated warehouse automated storage and retrieval systems (ASRS).
Conical Energy Absorption Buffers
Progressive conical profile delivering gentle deceleration with minimal peak end-force reaction.
Key Industrial Applications
Specifications & Technical Details
PU Buffers can be precision-manufactured in custom dimensions, wall thicknesses, cross-sections, and durometers to match your exact application specifications. Below are typical engineering cross-section drawings and technical parameters for reference.
Typical Dimension Drawings & Blueprint Cross-Sections
Technical Specifications
| Parameter | Specification / Options |
|---|---|
| Diameter Range | 40mm up to 400mm diameter |
| Height Range | 50mm up to 500mm buffer height |
| Max Energy Capacity | 100 Joules up to 75,000 Joules per buffer unit |
| Max Impact Velocity | Up to 5.0 m/s approach velocity |
| Max Compression Stroke | Cellular: up to 75% of buffer height; Solid: up to 50% |
| Mounting Hardware | Hot-dip galvanized or painted structural steel base plate with tapped holes or studs |
| Operating Temp | -35°C to +80°C |
Material Selection & Properties
We offer specialized compound formulations tailored to chemical media, thermal extremes, static deflection, and dynamic fatigue requirements. The best material depends on your operating environment and required service life.
| Material / Polymer | Key Engineering Properties | Recommended Applications & Considerations |
|---|---|---|
| Cast Polyurethane 70A - 95A | 5x higher abrasion resistance than rubber, high load | Forklift drive wheels, heavy slurry scraper blades |
| Hydrolysis-Resistant PU (Ether) | Resists microbial attack, wet environments & water | Marine guide rollers, wastewater treatment scrapers |
| High-Resilience PU (Ester) | Superior dynamic spring properties, tear strength >60 kN/m | Die-spring blocks, metal-stamping cushions |
| Food-Grade Polyurethane | FDA 21 CFR 177.2600 compliant, oil & fat resistant | Bakery dough rollers, meat processing conveyor scrapers |
| Antistatic PU (ESD) | Surface resistivity 10⁶ - 10⁹ Ω/sq prevents sparking | Automated warehouse AGV wheels, paint-line rollers |
Important Engineering Guidance
The above properties are general characteristics. Final material selection depends on your specific application, operating conditions, load requirements, media compatibility, and service temperature. Please contact our polymer engineering team for tailored compounding guidance on PU Buffers.
Production Batch Gallery
Actual production batch examples of PU Buffers manufactured for OEM, automotive, railway, and heavy engineering clients. We manufacture standard catalogue sizes as well as bespoke custom geometries from your CAD models or physical samples.
Request an Engineering Quote
Share your required dimensions, polymer grade, or 2D/3D drawings for immediate engineering review and quote.