55mm Hanging Sliding Door 4 Bearing Rollers Zinc
Heavy‑duty 55 mm hanging sliding door roller with four sealed bearings and zinc‑plated finish. Engineered for smooth, quiet operation and long life in commercial, industrial and residential sliding door systems — rated 300 kg per pair.
Key specifications
- Wheel diameter:55 mm
- Bearing arrangement:4 sealed ball bearings for low friction and long life
- Finish:Zinc plated corrosion‑resistant coating
- Load rating:300 kg per pair
- Material: Hardened steel wheel with precision bearings and stamped steel mounting bracket
- Typical applications: Overhead sliding doors, barn doors, industrial cold‑room doors, heavy timber or steel sliding doors
Features and benefits
- High load capacity: 300 kg per pair makes these rollers suitable for heavy doors and high‑use environments.
- Smooth, quiet travel: Four sealed bearings per wheel reduce friction, vibration and noise for consistent performance.
- Durable finish: Zinc plating protects against corrosion in outdoor and semi‑exposed environments.
- Robust construction: Hardened wheel and sturdy stamped bracket give reliable, long service life under heavy loads.
- Easy replacement: Standard dimensions for straightforward retrofit into existing hanging door systems.
Installation & maintenance tips
- Inspect track and mounting fixings for wear or damage before installation.
- Ensure correct alignment and clearance between wheel and track to prevent binding.
- Fit with compatible track width and secure mounting bolts to manufacturer torque recommendations.
- Periodically check and re‑tighten fixings; lubricate bearings only if specified by manufacturer (sealed bearings typically require no regular greasing).
- Replace rollers in matched pairs to maintain balanced operation and even wear.
Typical use cases
- Industrial and commercial sliding doors
- Heavy timber and steel workshop or warehouse doors
- Barn doors and agricultural gate systems
- Cold‑room and refrigeration sliding doors where robust, low‑maintenance hardware is required
