Engineering and construction machinery operates around abrasive debris, impact, moisture, chemicals, heavy loads and irregular duty cycles. Wheels, rollers, dampers, bushings, scrapers and liners must be selected for the actual load, motion and job-site environment.
Cast polyurethane can be specified by formulation, hardness, geometry and metal-bonded construction. Pepsen manufactures custom components from drawings or samples; final selection should consider load, speed, impact, temperature, chemicals, tolerances and installation.
Advantages of Polyurethane for Construction Machinery
– Rolling fatigue and heat management: Wheel and roller performance depends on load, speed, diameter, tread thickness, run length, start-stop frequency and core construction. Heat build-up and service life should be validated for the actual duty cycle.
– Impact damping and controlled contact: Resilient polyurethane can reduce metal-to-metal impact and protect some floors or mating components. Vibration, rolling resistance and energy effects depend on the complete machine and require application testing.
– Load capacity and cut resistance: Polyurethane grade, part geometry, metal core and bond design are selected for static load, dynamic load and shock exposure. Rated capacity must be confirmed by engineering calculation and validation testing.
– Temperature and chemical compatibility: Polyurethane formulations have different operating limits. Provide minimum and maximum temperature, continuous or intermittent exposure, oils, hydraulic fluids, cleaners, moisture and outdoor conditions.
Key Applications
– PU Wheels for Shield Tunneling Machines
Segment-transport and guide-wheel applications require the wheel load, speed, rail or floor condition, core or hub design, tread thickness, mounting and concrete-segment contact surface. These inputs determine hardness, geometry and bond construction.
– Excavator Dampers, Track Bushings, Shock Cushions, Elastic Pads & Guide Plates
Excavator components face impact, vibration, mud, sand and abrasive debris. Damper and bushing design should define impact energy, stroke, preload, available space, mating parts, temperature and contamination before selecting hardness and geometry.
– Crusher Liners, Jaw Plate Coatings & Vibrating Screen Components
Polyurethane liners and screen components can be evaluated for abrasive and impact wear. Compare particle size, hardness, impact angle, velocity, moisture, temperature, attachment and current wear patterns when selecting material and thickness.
– PU Conveyor Belt Scrapers & Rollers
Polyurethane conveyor scrapers and rollers can control material carryback, grip and contact with the belt. Specify belt material, speed, cleaner position, pressure, temperature and chemicals. For food-contact duties, request the formulation and documentation required for the intended use.
Related Polyurethane Products for Construction Machinery
- Custom Polyurethane Wheels – Drive, load and guide wheels for tunneling, lifting and construction equipment; specify load, speed, hub and contact surface.
- Urethane Springs – Custom spring and damper elements for machine tools, dies and vibration-control mechanisms.
- Polyurethane Rollers – Custom drive, support and guide rollers for conveyors, feeders and construction machinery.
- Polyurethane Bushings – Custom bushings for excavators, loaders, drilling and mining equipment.
