Heavy Duty 6 inch cast PU caster 400kg PU Caster industrial caster supplier Zhongshan

The 6 Inch (150mm) Heavy Duty Iron Core Cast Polyurethane (PU) Caster is engineered for heavy-duty industrial transport. Featuring a 50mm wide flat/plain tread and a rigid 5.5mm thick bracket, this caster delivers superior load-bearing performance without spring suspension. Available in Fixed (Rigid), Swivel, and Brake configurations, it is the ideal choice for stable, heavy-duty material handling on flat surfaces.

• Model Series:​ B01-R/S/H-1PU-650
• Wheel Diameter:​ 6" / 150mm
• Tread Width:​ 50mm (Flat/Plain Tread)
• Load Capacity:​ 400kg per caster (Brake model: 430kg)
• Bearing:​ 6203/6202 Ball Bearing
• Installation Height:​ 190mm
• Top Plate:​ 115×100mm | Hole Spacing: 82×72mm | Hole: Ø13mm
• Bracket Thickness:​ 5.5mm (Base & Fork)
• Material:​ Iron Core + Cast Polyurethane (PU), Shore A 95–98
• Options:​ Fixed / Swivel / Brake

• High Load Capacity:​ Supports up to 400kg (430kg for brake) per wheel, perfect for heavy industrial carts and machinery.
• Durable Iron Core:​ Prevents wheel deformation under sustained heavy loads.
• Cast PU Tread (Shore A 95–98):​ Excellent wear resistance, floor-protective, quieter than PP, good traction.
• 50mm Flat Tread:​ Provides maximum ground contact for superior stability and straight-line tracking.
• Rigid Structure:​ 5.5mm thick bracket ensures long service life with no flexing under weight.
• Smooth Operation:​ Equipped with 6203/6202 ball bearings for low-friction swiveling and pushing.
• No Spring Design:​ A rigid, non-shock-absorbing structure that keeps equipment height stable and predictable.

The 6" rigid iron core PU caster is best suited for environments where stability and heavy load distribution are prioritized over shock absorption:

• Heavy Stock Trolleys & Dollies:​ Ideal for transporting bulk materials in warehouses.
• Factory Flow Racks:​ Provides a stable base for rolling storage and work-in-progress stations.
• Industrial Workbenches:​ Used for heavy-duty assembly tables that require occasional movement.
• Equipment Stands:​ Supports stationary or semi-stationary industrial machinery on flat floors.
• Maintenance Platforms:​ Offers secure positioning for heavy tools and parts.

(Note: Not suitable for CNC routers, scissor lifts, or uneven outdoor terrain where spring suspension is required.)

• Cast Polyurethane (PU) Tread:​ Cast PU offers superior mechanical properties compared to molded PP — higher tear strength, excellent abrasion resistance, and non-marking performance on epoxy and concrete floors. Shore A 95–98 provides the ideal balance of hardness and elasticity for heavy loads.
• Iron Core Construction:​ Provides the structural integrity needed to handle 400kg without wheel distortion.
• Galvanized Finish:​ The 5.5mm bracket features a protective coating to resist corrosion in industrial environments.
• Standardized Mounting:​ The universal 115×100mm top plate allows for easy integration into existing equipment designs.

Understanding the tread design is crucial for selecting the right caster:

• Flat / Plain Tread (This Product):​ Features a full 50mm width of contact with the floor. It provides maximum stability, higher load distribution, and better straight-line tracking. It is designed for heavy-duty, flat-floor industrial use where equipment must remain steady.
• Arc / Curved Korean-Style Tread:​ Has a rounded crown. This reduces the contact patch, making it easier to pivot and turn​ (less scrub resistance). It is typically used for lighter-duty trolleys where maneuverability is more important than load stability.

The Biggest Difference:​ Flat tread = Stability & Heavy Load. Arc tread = Maneuverability & Easy Turning. This 6" caster is a rigid, anti-impact structural wheel with no shock absorption or spring suspension, built for strength, not cushioning.

We are a professional industrial caster manufacturer with more than 10 years of factory experience. We welcome OEM / ODM orders and can customize any combination of wheel and bracket to your requirements — including different materials and bracket thicknesses. Just send us your drawing, sample or requirement and we will engineer the right caster for your application.

• Wheel material: PP / PU / TPR / Rubber / Nylon / Phenolic / Forged steel / Cast iron / Aluminium core rubber / Cast Polyurethane (PU)
• Wheel hardness: Shore A 70–100 (or D scale for PP / Nylon)
• Wheel colour: Any RAL colour
• Core / centre: Aluminium core, iron core, no core
• Bracket: Galvanized / Stainless 304 / Stainless 316 / Painted — in various thicknesses
• Bracket thickness & top plate size: to your drawing (standard A05 bracket is 5.5 mm; we can go thicker for higher loads)
• Mounting type: Top plate / Threaded stem / Bolt hole / Expanding adapter / Central hole
• Brake type: No brake / Side lock / Total lock / Direction lock
• Bearing: Plain / Roller / 6203 / 6204 / 6205 / 6305 etc.
• Load rating: From 100 kg up to 1,000 kg+ per caster
• Special features: Anti-static (ESD), high-temperature, food-grade, explosion-proof, dual-wheel, spring suspension