Heavy duty 5 inch KU series dual spring shock absorbing caster with red polyurethane iron core wheel and galvanized steel bracket. 350kg load capacity, 6203 bearing. Perfect for laser cutters, woodworking machines, control cabinets. OEM/ODM available.

KEYWORDS:
5 inch dual spring caster, KU series caster 5 inch, red PU iron core wheel, galvanized bracket caster, 350kg caster wheel, laser cutter caster, woodworking machine caster, control cabinet caster, Korean style caster, 6203 bearing caster wheel

PRODUCT OVERVIEW

The KU Series 5 Inch Dual Spring Shock Absorbing Caster is the "Goldilocks" size of the range — the most versatile wheel for mid-weight industrial equipment. The red polyurethane tread on a solid cast iron core delivers floor protection and load capacity, while the galvanized steel bracket shrugs off humidity and corrosion.

At 350kg per wheel (1,400kg on a 4-wheel set), the KU-5 handles mainstream workshop machinery with ease. The dual-spring suspension absorbs floor irregularities and equipment vibration, making it the default choice for laser cutters, woodworking machines, electrical cabinets, and welding tables.

TECHNICAL SPECIFICATIONS

MATERIAL ADVANTAGES — WHY RED PU + IRON CORE + GALVANIZED BRACKET?

RED POLYURETHANE TREAD

• Non-marking on epoxy, concrete, PVC, and tile floors
• High abrasion resistance — outlasts standard rubber wheels 3× to 5×
• Oil, grease, and chemical resistant (shop-floor safe)
• Red pigment acts as a visual wear indicator (fades when replacement due)
• Shore A 95–98 balances load capacity with shock absorption

CAST IRON CORE

• Zero radial deflection under 350kg+ loads (no "flat spot" memory)
• Superior heat dissipation vs. aluminum under continuous rolling
• Provides the structural backbone for the PU tread bond
• Ideal for heavy, stationary equipment that moves occasionally

GALVANIZED STEEL BRACKET

• Zinc-plated finish resists rust and corrosion in humid environments
• Far superior to painted brackets (no paint chips → no exposed steel)
• Maintains structural integrity in warehouses and production halls
• Galvanized finish = longer service life, lower maintenance cost

DUAL SPRING SUSPENSION (The KU Advantage)

• Two independent springs absorb vertical and lateral shocks
• Protects sensitive equipment (electronics, instruments, optics)
• Reduces operator fatigue when pushing heavy loads
• Minimizes vibration transfer to the floor structure

5 INCH — APPLICATION GUIDE (Specific Products & Environments)

The 5" KU caster is the "universal size" — specified more than any other in the KU range. It offers the best balance of height, load capacity, maneuverability, and obstacle clearance for mid-weight equipment.

LASER & CNC EQUIPMENT

• Fiber laser cutting machines (entry & mid-range: 1390, 1325)
• CO₂ laser engraving & cutting machines
• CNC router bases (small to mid-size: 1212, 1224)
• CNC plasma cutters
• Laser marking & etching stations