Iron Steel Housing Sliding Roller 608zz High Carbon Steel Bearing With POM Material Wheel For Aluminum Sliding Window And Door Hardware

• 1. Component Breakdown & Terminology

  • 30mm: The outer diameter of the wheel (roda) itself. This is a standard size for medium-duty sliding windows and doors.

  • Iron Body (Corpo de Ferro): The main bracket or housing that holds the wheel. "Iron" typically means galvanized steel or zinc-plated steel to prevent rust. It is strong and cost-effective.

  • Hanging Wheel (Roda Suspensa / Roda de Carrinho): This indicates a top-riding wheel system. The wheel rolls along the top track (trilho superior) of the aluminum profile, and the door or window panel hangs from it.

  • 608zz Bearing: The heart of the wheel's performance.

    • 608: Standard industry designation for a bearing with 8mm inner diameter, 22mm outer diameter, and 7mm width.

    • zz: Indicates the bearing has metal shields (tampas) on both sides. This protects against dust and debris, which is crucial for the Brazilian environment, but is not permanently sealed (not waterproof).

  • For Aluminum Sliding Window and Door: Designed to fit into standard grooves/chambers in Brazilian aluminum profiles (e.g., common brands like Aluminox, Proalco, or local fabricator systems).

  Portuguese Terms: Roda de 30mm para Janela/Porta Corrediça, Carrinho de Corrediça, Roda com Rolamento 608zz.

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  2. Key Features & Specifications for the Brazilian Market

  • Load Capacity: A single wheel with a 608zz bearing typically supports 20-35 kg. Systems usually use 2 or 4 wheels per panel.

  • Material Quality:

    • Wheel: Often Nylon (PA66) or PVC for quiet operation and good wear resistance.

    • Axle/Pin: Should be hardened steel.

    • Bearing: Must be genuine, smooth-running Chrome Steel (AISI 52100). Low-quality bearings are a major point of failure.

  • Finish/Coating: The iron body must have a high-quality galvanization or zinc plating to withstand Brazil's diverse climates, especially coastal humidity.

  • Height Adjustment: Many versions include a height adjustment screw (parafuso de regulagem de altura). This is critical for installation, allowing the installer to level the door/window and compensate for track irregularities.

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  3. Why This Spec is Popular in Brazil

  1. Cost-Effectiveness: Provides a good balance between durability, performance, and price, which is essential for the competitive construction market.

  2. Adequate Performance: Suitable for the vast majority of residential and light commercial sliding applications with standard aluminum profiles.

  3. Availability & Standardization: The 608zz bearing is a global standard (used in skateboards, fidget spinners), making it widely available and affordable for replacement.

  4. Compatibility: The 30mm size and housing design are made to fit the most common aluminum profile systems used by Brazilian fabricators.

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  4. Procurement & Quality Checklist for Importers/Buyers

  When sourcing this product for Brazil, pay attention to:

  • Bearing Brand/Origin: Ask if bearings are from known manufacturers (even if Chinese brands like C&U, LYC, HRB are acceptable). Avoid no-name bearings.

  • Plating Thickness: Inquire about zinc coating thickness (e.g., 8-12 microns). Thicker is better for corrosion resistance.

  • Wheel Material: Specify PA66 Nylon over cheaper, less durable plastics.

  • Packaging: Should be well-packed to prevent rust during sea freight (moisture-resistant bags with VCI paper are a plus).

  • Sample Testing: Always request samples to test:

    • Smoothness of roll

    • Load capacity (static and dynamic)

    • Salt spray test (enspray de sal) on the iron body to simulate coastal conditions.

  • Certifications: While not always mandatory, ISO 9001 from the factory is a good sign. Compliance with ABNT standards (like ABNT NBR 10821 for windows) for the complete system may be required by larger projects.

• Aluminum Sliding Windows
• Aluminum Sliding Glass Doors
• Patio Doors
• Balcony Doors
• Commercial and residential sliding systems

1. Remove your old roller wheel from the window frame
2. Measure the outer diameter of the old wheel
3. Measure the width (thickness) of the old wheel
4. Measure the diameter of the center axle pin hole
5. Confirm measurements match our 25mm (OD) × 20mm (W) size

• B2B/Wholesale: 100 pieces per carton in secured plastic bags
• B2C/Retail: Consumer-friendly blister packs (2 or 4 pieces) with Arabic/English installation guide

• Professional pre-sale consultation and product guidance
• Efficient order processing with advance delay notifications
• Comprehensive after-sale support including warranty coverage
• Custom solutions and OEM/ODM services available

We operate our own factory and handle all trade activities directly.

5-10 days for in-stock items, 25-35 days for larger quantities requiring production.

Yes, though customers must pay freight costs which can be refunded against future orders.

Yes, we can customize products according to your specifications or drawings.