5 Inch / 125mm Iron Core PU Heavy Duty Caster (Swivel / Side Brake / Total Brake)

 5 Inch Heavy Duty Iron Core Polyurethane (PU) Caster – 320kg Load, Rigid Mount, No Spring Shock Absorption

Short Description​

5" (125mm) iron-core PU caster, 320kg capacity, 6203 bearing, 165mm install height, 115×100mm top plate, 5.5mm steel bracket. Three SKUs: swivel, side brake, total brake. No spring suspension — not impact-rated.

Product Features

• Wheel: Iron Core Polyurethane (PU), Shore A 95-98, 125mm (5") × 50mm
• Load Capacity: 320kg / caster
• Bearing: 6203
• Installation Height: 165mm
• Top Plate: 115 × 100mm | Hole Spacing: 82 × 72mm | Hole: 13mm
• Bracket & Plate Thickness: 5.5mm
• Rigid, non-spring galvanized steel fork
• SKUs: 80I-S-RKU-550 (Swivel), 80I-E-RKU-550 (Side Brake), 80I-T-RKU-550 (Total Brake)

Product Advantages

• Higher load than 4" with same plate footprint
• Iron core + PU = stable rolling, excellent wear & floor protection
• PU is quieter and more grippy than PP
• Easy to clean; suitable for dry indoor industrial floors
• Brake choices for static positioning
• 6203 bearing reduces push force

Applications by Variant (5 Inch)

• Swivel 80I-S-RKU-550:​ Medium-duty stock carts, warehouse dollies, factory flow racks, equipment stands
• Side Brake 80I-E-RKU-550:​ Packing tables, mobile workstations, maintenance platforms
• Total Brake 80I-T-RKU-550:​ Fixed-position jigs, inspection carts, stationary heavy stands on level floors

Applicable Product Names

Warehouse cart, stock trolley, flow rack caster, packing table wheel, maintenance platform caster, industrial dolly, equipment stand caster.

NOT Suitable / Where NOT to Use

Not for laser cutters, control cabinets with sensitive alignment, CNC routers, scissor lifts, generators, uneven floors, ramps, or vibrating machinery. No spring = no shock/impact absorption.

SEO Hot Keywords

5 inch heavy duty caster, 125mm PU iron core wheel, 320kg industrial caster, side brake caster 5 inch, total brake rigid caster, non-spring warehouse caster, 6203 bearing, top plate 115x100, galvanized steel bracket.

Google Ranking Target Phrases

• 5 inch iron core polyurethane caster 320kg
• rigid swivel caster no shock absorption
• 5" side brake industrial caster
• heavy duty PU wheel caster 125mm
• total brake caster for warehouse trolley

FAQ

Q: Is this the spring-type Korean caster?​

A: No. This is the rigid BKJ/RKU/KU series with iron-core PU wheel and no springs.

Q: Can I use on a laser cutter?​

A: Not recommended. Laser cutters/control cabinets benefit from shock-absorbing (spring/PU) casters to protect alignment.

Q: Wheel material temperature range?​

A: PU Shore A 95-98 is suitable for normal indoor industrial temps; avoid high heat above 80°C and prolonged freezing if impact is expected.

Q: Are all three brake types the same top plate?​

A: Yes — 115×100mm, 82×72mm hole spacing, 13mm holes.

5 inch caster 100mm heavy duty caster iron core PU wheel PU caster bracket caster 6203 bearing caster bench lathe wheel Shore A 90 PU non-marking industrial caster

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