Key Features & Components

1. Heavy-Duty Construction: Designed to withstand significant weight and frequent use, far exceeding the capabilities of standard residential door rollers.

2. High Load Capacity (150kg per roller): This is the standout feature. It indicates the roller is built with robust materials and a strong internal structure to handle immense weight without deforming or failing.

3. Steel Ball Bearing: This is the core of the roller's performance.

   • Function: The bearing allows for incredibly smooth and effortless rolling motion.

   • Durability: Steel bearings are resistant to wear and tear, ensuring a long service life even under heavy loads and constant use.

   • Low Maintenance: Sealed or shielded bearings often require no lubrication and are protected from dust and debris.

4. Plastic (Nylon/PVC) Wheel: The wheel itself is typically made from a hard, durable engineering plastic like nylon.

   • Advantages: It is corrosion-proof, quiet in operation (noisy metal-on-metal rolling is eliminated), and resistant to weathering. It also won't mark or grind down the aluminum door track.

5. Stainless Steel or Zinc-Plated Steel Axle/Bracket: The axle that the wheel spins on and the mounting bracket are usually made of corrosion-resistant metal to prevent seizing and rust, which is crucial for long-term functionality.

6. Adjustable Height Mechanism (Often Included): Many of these heavy-duty rollers come as part of an assembly with a height adjustment screw. This allows you to precisely raise or lower the door to align it perfectly within the frame and ensure smooth operation after installation or as the building settles.

Typical Applications

• Large Commercial Sliding Patio Doors: Common in office buildings, restaurants, and retail stores.

• Heavy Glass Doors: Especially large, double-paned, or tempered glass doors which are extremely heavy.

• Hotel Ballroom or Conference Room Doors: Where wide access and a robust build are required.

• Modern Residential Large-Sliding Systems: High-end homes with extra-large glass sliding doors.

• Replacement for Worn-Out Rollers: This is the most common use—replacing old, cracked, seized, or flattened rollers that cause the door to stick, drag, or become difficult to open.