Overview

The Ningbo Dimon Gravity Self-Locking Swivel Caster (Weight-Activated Auto-Locking Furniture Wheel) is an engineered safety caster designed for children's study chairs, mobile rolling step stools, storage ottomans, toy trunks, and mobile cabinetry. Utilizing an internal high-elasticity compression spring and pressure-sensitive locking mechanism, this caster glides smoothly with full 360-degree swivel rotation when unloaded. The moment a person sits on the chair, steps onto the stool, or applies downward pressure (over 5 kg per wheel / 20 kg across 4 wheels), the internal mechanism compresses, engaging the integrated non-slip friction brake to firmly lock the unit in place and prevent dangerous slipping, skidding, or tipping.

Key Features

• Weight-Activated Auto-Locking Mechanism: Automatically switches from free-rolling to rigid locked state under downward load (>5 kg per wheel), preventing accidental roll-away accidents while seated or standing on furniture.
• Effortless Free-Glide When Unloaded: Under zero or light load, the caster swivels 360 degrees and rolls silently with minimal push-pull resistance for effortless repositioning.
• Heavy-Duty 200 kg Total Load Rating: Set of four casters easily supports up to 200 kg (440 lbs) static/dynamic load capacity, ideal for adult step stools and heavy storage chests.
• Thickened 2mm Heavy-Gauge Steel Base Plate: Rigid cold-rolled steel mounting top plate (2mm thickness) resists bending, deformation, and shearing under high point loads.
• Floor-Friendly Silent Twin-Wheel Design: Dual-wheel wear-resistant nylon/polyurethane construction glides quietly without scratching hardwood, laminate, tile, or vinyl flooring.
• Compact Low-Profile Form Factor: Features an ultra-compact ~35mm profile height to maintain a low center of gravity and stable furniture footing.

Technical Specifications

• Product Type: Gravity Self-Locking Swivel Caster Wheel
• Locking Principle: Weight-Activated / Pressure-Sensitive Internal Spring Brake
• Trigger Load Threshold: Engages locking at >5 kg per caster (approx. >20 kg total furniture load)
• Load Capacity: 50 kg (110 lbs) per caster; 200 kg (440 lbs) for a set of 4
• Swivel Range: 360-Degree Swivel Rotation
• Top Plate Material: Heavy-Duty 2mm Thick Galvanized Carbon Steel
• Wheel Material: High-Density Wear-Resistant Engineering Nylon / POM Twin Wheels
• Mounting Type: Flat Top Plate with Dual Screw Hole Fixings
• Profile Height: Approx. 35 mm (Low-Profile Stability)
• Color / Finish: Matte Black with Zinc-Plated Mounting Plate
• Ideal Applications: Children's study chairs, mobile library step stools, bedside step-up ottomans, toy storage boxes, rolling workbench pedestals

Wholesale & OEM Capabilities

• Custom Mounting Options: Available with flat top plates, threaded stems (M8/M10), or friction grip neck stems upon request.
• Spring Tension Calibration: Tailored internal spring resistances for custom weight-activation thresholds (e.g., pediatric vs. adult furniture).
• Bulk Contractor Packaging: Bulk cartons (100–400 pcs/carton) with mounting hardware included.
• Factory-Direct B2B Supply: Direct manufacturing from Ningbo Dimon, strict fatigue testing, low MOQ, and full container or LCL global export.