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| Brand Name: | Luma |
| Model Number: | / |
| MOQ: | 4 |
| Price: | / |
| Payment Terms: | L/C,wechat,alipay |
| Supply Ability: | 100000 |
This heavy duty iron core PU caster is built for dry indoor industrial floors – machining workshops, metal fabrication shops, woodworking plants, assembly lines, maintenance bays, and in-plant material handling. The wheel combines a chemical-bonded orange polyurethane tread (Shore A 90–95) over a solid cast iron core, mounted in a 5 mm black painted steel top-plate fork with 6202 deep groove ball bearing. It is not a stainless marine caster – it is a cost-effective, high-load workshop caster for moving CNC machines, laser cutters, electrical cabinets, and heavy trolleys without damaging epoxy or concrete floors.
Keywords embedded: heavy duty caster wheels for industrial equipment, iron core polyurethane caster, orange PU wheel 6202 bearing, black bracket rigid swivel brake caster, industrial equipment mobility, non-marking PU wheel, cast iron core caster, workshop caster wheels.
⚠️ Not for seafood, brine, outdoor rain or salt spray. For those, use 304 stainless steel PU caster.
The 4" model is the lowest-profile, tightest-turning size in this series. At 280 kg single-wheel capacity (≈ 1,120 kg on a 4-wheel set), it handles compact standalone equipment that moves short distances inside one bay.
Why 4": Low mounted height, small swivel radius, enough load for sub-1-ton machines. PU 90A absorbs spindle vibration, protects shop floor.
The 5" is the most specified size for mid-weight stationary machines that need occasional repositioning for maintenance or layout change. 350 kg/wheel = 1,400 kg system load.
Why 5": Rolls over cables, chips and floor joints better than 4", still keeps machine height reasonable for ergonomics.
The 6" is the heavy hitter of this black-bracket family. 410 kg/wheel (1,640 kg / 4-wheel set), best obstacle clearance, least rolling force under load.
Why 6": Maximum contact patch, lowest deformation under 400 kg+, survives metal chip floors and threshold ramps.
The 8" is the largest and most capable model in the K02 series. At 420 kg per wheel (≈ 1,680 kg on a 4-wheel set), it is engineered for the heaviest standalone industrial machines and rough-floor material handling. The 200 mm diameter rolls effortlessly over floor cracks, steel plates, cable ramps, and debris that would stop smaller wheels cold.
Why 8": Maximum diameter = lowest rolling resistance under extreme load. Crosses floor joints, ramps, and uneven concrete without jacking or jamming. The extra height (245 mm overall) provides ground clearance for rough floors.
| Size | Dia × Width | Load/wheel | PU Hardness | Temp Range | Best For |
|---|---|---|---|---|---|
| 4" | 100 × 50 mm | 280 kg | Shore A 90–95 | -20~80°C | CNC engraver, tool cart, bench lathe |
| 5" | 125 × 50 mm | 350 kg | Shore A 90–95 | -20~80°C | Laser cutter, control cabinet, saw |
| 6" | 150 × 50 mm | 410 kg | Shore A 90–95 | -20~80°C | CNC router, scissor lift, compressor |
| 8" | 200 × 50 mm | 420 kg | Shore A 90–95 | -20~80°C | Large laser, generator, mobile racking |
These black bracket orange PU casters are designed for industrial equipment mobility inside factories and warehouses. They are widely used on CNC engraving machines, CNC routers, fiber laser cutting machines, CO₂ laser engravers, woodworking saws, electrical control cabinets, welding tables, injection molding auxiliaries, scissor lift tables, steel coil carts, pallet dollies, AGV tugger trailers, paint line skids, powder coating racks, air compressors, diesel generators, mobile racking systems, and construction material carts. The cast iron core carries the weight; the polyurethane tread cushions vibration from spindles, pumps and compressors while leaving no black mark on the floor. Working temperature -20°C to +80°C covers cold workshop mornings and summer metal shops. For food grade, washdown, seawater or outdoor use, switch to stainless steel caster – this model is strictly for dry industrial duty.
📩 Ready to equip your machines with the right size caster? Browse our full K02 iron core PU caster series – 4", 5", 6", 8" in Rigid, Swivel and Swivel+Brake. Factory-direct pricing, free samples, OEM/ODM customization (wheel material, temperature range, load tuning, plate size). Contact us today for a quote.
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