Heavy Duty Industrial Wheel Casters 6"dual Spring Caster Red PU Iron Core 400kg For Scissor Lifts Compressors Heavy Machinery.

Heavy duty 6 inch  dual spring shock absorbing caster with red polyurethane iron core wheel and galvanized steel bracket. 400kg load capacity, 6203 bearing. Built for CNC routers, scissor lifts, compressors, heavy machinery. OEM/ODM available.

6 Inch KU Series Dual Spring Shock Absorbing Caster – Red Iron Core PU Wheel, Galvanized Steel Bracket, 400kg Load Capacity6" KU Dual Spring Caster | Red PU Iron Core | 400kg | Galvanized

6 inch dual spring caster, KU series caster 6 inch, red PU iron core wheel, galvanized bracket caster, 400kg caster wheel, CNC router caster, scissor lift caster, air compressor caster, heavy machinery caster, Korean style dual spring caster

PRODUCT OVERVIEW

The KU Series 6 Inch Dual Spring Shock Absorbing Caster is the heavy-duty workhorse of the range. With a 400kg single-wheel capacity (1,600kg on a 4-wheel set), it is engineered for substantial machinery and equipment that must move safely across workshop floors.

The red polyurethane tread bonded to a cast iron core provides maximum load support without deflection, while the dual-spring suspension protects both the equipment and floor from shock loads. The galvanized steel bracket ensures long service life even in humid, demanding environments. If you're mounting wheels on a CNC router, scissor lift, air compressor, or heavy fabrication table — the KU-6 is your wheel.

TECHNICAL SPECIFICATIONS

Wheel Diameter: 150 mm (6 inches)
Wheel Width: 50 mm
Wheel Material: Red Polyurethane (PU) on Cast Iron Core
Core Material: Cast Iron (solid, non-deflecting)
PU Hardness: Shore A 90–95 (high resilience, non-marking)
Load Capacity: 400 kg per wheel (1,600 kg / 4-wheel set)
Bearing: 6203 Deep Groove Ball Bearing (sealed)
Bracket / Fork: Heavy Duty Galvanized Steel (zinc-plated, anti-rust)
Suspension: Dual Spring Shock Absorption (top & side mount)
Mounting Options: Swivel / Swivel + Brake / Rigid (Fixed)
Overall Height: ≈ 195 mm (varies by type)
Top Plate: 95 × 67 mm (standard KU plate)
Plate Thickness: 4.5–5.0 mm steel
Bolt Hole Spacing: 78 × 55 mm
Bolt Hole Diameter: 11 mm
Temperature Range: -20 °C to +80 °C (standard PU formulation)

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 400kg+ 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

6 INCH — APPLICATION GUIDE (Specific Products & Environments)

The 6" KU caster is the heavy-duty champion of the series — specified for substantial machinery and heavy material handling equipment. Its larger diameter provides the best obstacle clearance and lowest rolling resistance under extreme loads.

• CNC & HEAVY MACHINERY
  • CNC routers (1325, 1530, 2030 — wood & aluminum)
  • CNC machining centers (VMC auxiliaries)
  • EDM (electrical discharge machines)
  • Surface grinders & cylindrical grinders
  • Large drill presses & radial arm drills
  • Gear hobbing & milling machines
• POWER & COMPRESSED AIR EQUIPMENT
  • Industrial air compressors (screw & piston type)
  • Air receiver tanks
  • Diesel & gasoline generators (small to mid-size)
  • Transformer & switchgear bases
  • Welding machine trolleys (large MIG/TIG units)
• LIFTING & MATERIAL HANDLING
  • Scissor lift tables (hydraulic & electric)
  • Hydraulic lift carts
  • Pallet dollies & heavy-duty platform trolleys
  • Steel coil carts
  • Coil winding machine bases
• PLASTICS & RUBBER INDUSTRY
  • Injection molding machine auxiliaries (dryer, hopper, granulator carts)
  • Mold exchange dollies & mold storage racks
  • Extrusion line support trolleys
  • Rubber mixing mill bases
• FABRICATION & ASSEMBLY
  • Heavy welding tables & rotary positioners
  • Assembly jigs & fixtures on wheels
  • Metal fabrication workbenches
  • Shot blasting & sanding equipment bases
• TYPICAL ENVIRONMENTS / FACILITIES
  • Heavy machinery workshops
  • CNC machining centers & job shops
  • Sheet metal fabrication plants
  • Plastics injection molding facilities
  • Automotive assembly & component plants
  • Steel service centers & coil processing
  • Generator & compressor rental yards
  • Maintenance, repair & overhaul (MRO) facilities
  • Heavy equipment dealerships & service bays
• 

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

• HIGHEST load capacity in the standard KU range (400kg/wheel)
• BEST obstacle clearance — rolls over floor cracks, cables, thresholds
• LOWEST rolling resistance under heavy loads (easier to push)
• Ideal for equipment weighing 800kg to 1,600kg
• Optimal balance of capacity vs. equipment height

• Under 350kg per wheel? 5" is more economical.
• Need max height / rough-terrain? 8" is the next step up.

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 6 inch KU series dual spring shock absorbing caster with red polyurethane iron core wheel and galvanized steel bracket is engineered for heavy-duty CNC routers, vertical machining centers, EDM machines, surface grinders, industrial air compressors, diesel generators, scissor lift tables, hydraulic lift carts, injection molding auxiliaries, mold exchange dollies, steel coil carts, and heavy welding positioners. The dual spring suspension system protects precision machine components and electronics from floor shock and vibration, while the red PU tread provides quiet, non-marking mobility on concrete and epoxy floors. The solid cast iron core supports up to 400kg per wheel without deflection, making the KU-6 the trusted choice for heavy machinery workshops, CNC job shops, plastics manufacturing, metal fabrication plants, and equipment rental yards.

FREQUENTLY ASKED QUESTIONS

• Q: Can the 6" KU caster really carry 400kg?
  A: Yes — 400 kg per wheel under uniform load on flat ground. A 4-wheel set supports up to 1,600 kg total equipment weight.
• Q: What heavy machines use this caster?
  A: CNC routers (1325/1530/2030), scissor lifts, air compressors, generators, EDM machines, injection molding auxiliaries, and heavy welding tables.
• Q: Will the galvanized bracket rust outdoors?
  A: Galvanized steel is suitable for humid indoor and covered outdoor use. For full outdoor rain or salt spray, choose 304 stainless.
• Q: Can I get replacement springs?
  A: Yes, we stock replacement spring kits and can adjust spring rate for custom load requirements.
• Q: Do you offer stainless steel brackets?
  A: Yes — 304 stainless steel brackets are available for corrosive, washdown, or marine environments.

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

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