Heavy-duty PU swivel caster engineered for smooth, quiet movement and long service life. Designed for demanding applications where wear resistance, load capacity, and reliable braking are required. Key benefits Durable construction: Polyurethane (PU) wheel for wear resistance and quiet operation mounted on a thick cold-rolled steel bracket for toughness and high load capacity. Smooth, reliable rotation: Sealed, leak-proof ball assembly provides smooth 360° swivel for easy maneuvering. Protected bearings: Dustproof covers on both sides prevent winding and debris from entering the bearing area, extending service life and reducing maintenance. Secure stopping: High-performance double locking (Total Lock/Total Lockibrake) simultaneously locks the wheel and the swivel arm, keeping equipment firmly in place. Soft and quiet: PU tread cushions shocks and reduces noise compared with hard casters, protecting floors and improving user comfort. Specifications Wheel material: Polyurethane (PU) Bracket material: Thick cold-rolled steel Bearing/rotation: Sealed ball assembly (leak-proof), 360° rotation Dust protection: Dustproof covers on both sides Brake: Double locking Total Lock/Total Lockibrake — locks both wheel and swivel arm Thread stem: 12 mm thread diameter, 25 mm thread length Available wheel sizes and load capacity per caster: 3 inches (75 mm): 115 kg each 4 inches (100 mm): 140 kg each 5 inches (125 mm): 155 kg each Compatibility and installation Thread diameter 12 mm with 25 mm stem length — verify that mounting socket or insert accepts a 12 mm threaded stem before installation. Suitable for retrofitting onto carts, equipment, and fixtures with compatible stem fittings. Practical applications Industrial carts and trolleys: Carry heavy loads on production floors while protecting floor surfaces and minimizing noise. Medical or laboratory equipment: Provide smooth, quiet mobility with reliable braking and contamination protection from dustproof covers. Furniture and display units: Upgrade cabinets, workbenches, or retail displays for easier relocation and secure locking when stationary. What this caster solves Reduces downtime and maintenance by protecting bearings from debris and preventing leakage. Improves safety by providing a dependable total-lock brake that prevents both wheel movement and swivel rotation. Extends equipment life and protects floors through a wear-resistant, soft PU tread that absorbs shock and reduces noise. Select the appropriate wheel diameter for your load requirements and confirm the 12 mm x 25 mm threaded stem fits your mounting hardware.