Heavy duty Industrial Wheel Casters 5 inch 350kg load capacity laser cutters woodworking machines

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 90–95 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

🪵 WOODWORKING MACHINERY

• Sliding table panel saws
• Thickness planers & jointers
• Band saw stands
• Dust collector trolleys
• Woodworking workbenches

ELECTRICAL & CONTROL EQUIPMENT

• Electrical control cabinets & VFD panels
• PLC enclosures & switchgear skids
• Power distribution units (PDU)
• Transformer bases
• Battery rack trolleys

WELDING & METAL FABRICATION

• Welding tables & welding positioners
• Fitter workbenches
• Grinding machine bases
• Metal cutting band saw stands
• Fabrication assembly tables

GENERAL INDUSTRIAL

• Injection molding machine auxiliaries (hopper carts, dryer stands)
• Printing press stands (offset, flexo)
• Die-cutting machine dollies
• Conveyor section supports
• Assembly line workstations

MEDICAL & LABORATORY (dry indoor)

• Medical imaging trolleys (portable X-ray, C-arm)
• Ultrasound & diagnostic carts
• Laboratory fume hood support trolleys
• Pharmacy automation carts

TYPICAL ENVIRONMENTS / FACILITIES

• Metal fabrication workshops
• Laser cutting job shops
• Woodworking factories & cabinet shops
• Electrical panel assembly plants
• Automotive component manufacturing
• Injection molding facilities
• Printing & packaging plants
• Assembly lines & production halls
• Maintenance & repair bays

WHY CHOOSE 5 INCH OVER 4", 6", OR 8"?

• BEST overall balance of load (350kg) vs. mounted height
• Rolls over cables, floor joints & small thresholds better than 4"
• Keeps equipment at ergonomic working height
• Most cost-effective size for mainstream machinery
• Largest available inventory — shortest lead time

Equipment under 280kg? 4" may suffice (lower profile).
Equipment over 400kg or rough floors? Step up to 6" or 8".

KEY FEATURES (Scannable Bullets)

• ✓ Dual spring shock absorption (vertical + lateral)
• ✓ Red PU tread Shore A 90–95, non-marking, oil-resistant
• ✓ Cast iron core — zero deflection under heavy load
• ✓ Galvanized steel bracket — anti-rust, maintenance-free
• ✓ 6203 precision ball bearing — smooth, low rolling resistance
• ✓ 3 mounting styles: Rigid / Swivel / Swivel + Brake
• ✓ Floor protective on concrete, epoxy, tile, PVC
• ✓ Temperature range -20 °C to +80 °C
• ✓ OEM / ODM customization available

LONG-TAIL SEO APPLICATIONS PARAGRAPH

The 5 inch KU series dual spring shock absorbing caster with red polyurethane iron core wheel and galvanized steel bracket is the industry-standard wheel for fiber laser cutting machines, CO₂ laser engravers, CNC routers, sliding table saws, thickness planers, electrical control cabinets, VFD panels, welding tables, and injection molding auxiliary equipment. The dual spring system cushions equipment against floor vibration and shock, protecting sensitive laser optics, CNC electronics, and control boards. The red PU tread rolls quietly and without marking on epoxy, concrete, and tile floors, while the cast iron core supports 350kg without deflection. With 6203 bearings and a galvanized corrosion-resistant bracket, the KU-5 is trusted across metal fabrication shops, woodworking factories, electrical assembly plants, and manufacturing facilities worldwide.

FREQUENTLY ASKED QUESTIONS

• Q: What load can the 5 inch KU caster handle?
  A: 350 kg per wheel, or 1,400 kg total on a 4-wheel equipment set (assuming even weight distribution on flat ground).
• Q: Is 5" the right size for my fiber laser cutter?
  A: In most cases, yes. 5" is the recommended size for 1390 and 1325 fiber laser machines. If your machine exceeds 1,400kg total, step up to 6".
• Q: What does the galvanized bracket protect against?
  A: Humidity, condensation, and mild corrosive atmospheres common in workshops and warehouses. For saltwater or washdown, use 304 SS.
• Q: Can I get a brake on this model?
  A: Yes — choose "Swivel + Brake" (side brake) or request a total-lock brake for both wheel and swivel lock.
• Q: Do you offer custom wheel materials or hardness?
  A: Yes. We manufacture with PU, TPR, rubber, nylon, PP, and more — custom hardness, color, and core material available.

CUSTOM ORDER — WE MANUFACTURE WHAT YOU NEED

We are a professional industrial caster manufacturer with 10+ years of factory experience. We welcome OEM / ODM orders and can customize:

• Wheel material: PU / TPR / Rubber / Nylon / PP / Phenolic
• Wheel hardness: Shore A 70 to 100 (or D scale on request)
• Wheel color: Red / Orange / Black / Gray / White / Custom Pantone
• Core material: Iron / Aluminum / Nylon
• Bracket finish: Galvanized / Zinc-plated / Stainless 304 / Painted
• Mounting: Top plate / Threaded stem / Bolt hole / Central pin
• Brake type: Side brake / Total lock / Directional lock
• Bearing: 6202 / 6203 / 6204 / tapered roller / custom
• Load rating: From 100 kg to 1,000 kg+ per wheel
• Special features: Anti-static, conductive, high-temp, low-temp, food-grade, explosion-proof

Contact us with your requirements — we'll engineer the right caster-wheel-bracket combination for your application.

TAGS / HASHTAGS

#DualSpringCaster #KUseries #5InchCaster #RedPUWheel #IronCorePU #GalvanizedBracket #ShockAbsorbingCaster #350kgCaster #KoreanStyleCaster #HeavyDutyCaster #IndustrialCaster #LaserCutterCaster #WoodworkingCaster #ControlCabinetCaster #OEMCaster #CasterManufacturer

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KEY FEATURES (Scannable Bullets)

• ✓ Dual spring shock absorption (vertical + lateral)
• ✓ Red PU tread Shore A 90–95, non-marking, oil-resistant
• ✓ Cast iron core — zero deflection under heavy load
• ✓ Galvanized steel bracket — anti-rust, maintenance-free
• ✓ 6203 precision ball bearing — smooth, low rolling resistance
• ✓ 3 mounting styles: Rigid / Swivel / Swivel + Brake
• ✓ Floor protective on concrete, epoxy, tile, PVC
• ✓ Temperature range -20 °C to +80 °C
• ✓ OEM / ODM customization available

LONG-TAIL SEO APPLICATIONS PARAGRAPH

These 4 inch dual spring shock absorbing casters with red polyurethane iron core wheels and galvanized steel brackets are widely used on CNC engraving machines, desktop milling machines, tool chest trolleys, SMT magazine carts, mobile workbenches, welding carts, laboratory instrument trolleys, and hospital supply wagons. The dual spring suspension protects sensitive electronics and instruments from vibration damage during movement, while the red PU tread provides quiet, non-marking rolling on epoxy and concrete floors. The galvanized bracket resists humidity and corrosion in production halls and maintenance bays. With a 250kg single wheel load rating and 6203 bearing, the KU-4 is the go-to choice for compact, heavy-duty mobility in workshops, garages, laboratories, and light manufacturing facilities.

FREQUENTLY ASKED QUESTIONS

• Q: What is the load capacity of the 4 inch KU caster?
  A: 250 kg per wheel. A standard 4-wheel set supports up to 1,000 kg (distributed evenly on flat ground).
• Q: Can the dual springs be adjusted or replaced?
  A: Yes. Springs are a wear item — we supply replacement spring kits and can adjust spring rate for specific load requirements.
• Q: Is the galvanized bracket rust-proof?
  A: The zinc plating provides excellent corrosion resistance in indoor and mildly humid environments. For salt spray or washdown, request our 304 stainless steel bracket option.
• Q: What machines use this 4" caster?
  A: CNC engravers (6090/3040), tool trolleys, workbenches, sewing machines, SMT carts, lab trolleys, and small compressor trolleys.
• Q: Can I get a different wheel material (e.g., gray rubber, white PP)?
  A: Absolutely — we support custom wheel materials, hardness, and bracket combinations. See "Custom Orders" below.

CUSTOM ORDER — WE MANUFACTURE WHAT YOU NEED

We are a professional industrial caster manufacturer with 10+ years of factory experience. We welcome OEM / ODM orders and can customize:

• Wheel material: PU / TPR / Rubber / Nylon / PP / Phenolic
• Wheel hardness: Shore A 70 to 100 (or D scale on request)
• Wheel color: Red / Orange / Black / Gray / White / Custom Pantone
• Core material: Iron / Aluminum / Nylon
• Bracket finish: Galvanized / Zinc-plated / Stainless 304 / Painted
• Mounting: Top plate / Threaded stem / Bolt hole / Central pin
• Brake type: Side brake / Total lock / Directional lock
• Bearing: 6202 / 6203 / 6204 / tapered roller / custom
• Load rating: From 100 kg to 1,000 kg+ per wheel
• Special features: Anti-static, conductive, high-temp, low-temp, food-grade, explosion-proof

Contact us with your requirements — we'll engineer the right caster-wheel-bracket combination for your application.

TAGS / HASHTAGS

#DualSpringCaster #KUseries #4InchCaster #RedPUWheel #IronCorePU #GalvanizedBracket #ShockAbsorbingCaster #250kgCaster #KoreanStyleCaster #HeavyDutyCaster #IndustrialCaster #TrolleyWheel #WorkbenchCaster #CNCEngraverCaster #OEMCaster #CasterManufacturer

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