Rolled Bushing & Rolled Support Bracket: Selection Guide for Enclosed Rotary Shaft

1. Main Function of Rolled Components

Rolled bushing and rolled support bracket are exclusive standard accessories for enclosed rotary shafts. Although these small parts are easy to overlook, they directly determine the rotating feel, structural stability and overall service life of rotary shaft products.

The core working principle relies on interference fit between the shaft core and rolled parts. The rolled structure will produce elastic deformation and mutual extrusion force during assembly. When the shaft core rotates, the clamping force generated by deformation forms stable rotating resistance, realizing damping rotation and angle positioning for flip devices.

2. Structural Features of Two Core Parts

2.1 Rolled Bushing

• Adopts stamping and roll forming technology, with thin and lightweight overall structure.

• Equipped with raised contact points on the surface to increase friction and keep torque stable.

• Reserved oil storage grooves for continuous lubrication, effectively reducing wear and extending service life.

• Thickness range: 0.3mm ~ 0.6mm. Thicker bushing brings larger torque.

Application Scenarios: It is suitable for small-angle damping shafts and plastic flip shafts. Widely used in Bluetooth headset hinges, small instrument flip shafts and other lightweight devices. Perfect for pure steel shafts and narrow internal spaces that do not require anti-rotation locking.

2.2 Rolled Support Bracket

• Main body is roll-formed, with ear-shaped locking tabs at the joint for firm installation and anti-loosening.

• Thickness range: 0.6mm ~ 1.2mm, thicker than regular rolled bushings.

• Multiple brackets and bushings can be assembled in parallel to stack torque for high-damping requirements.

Application Scenarios: Ideal for large-screen laptop hinges, tablet brackets, vehicle display flip shafts and smart home rotary parts. It is specially designed for products with aluminum alloy or zinc alloy shells, requiring anti-rotation locking, large torque and long-term load positioning.

3. Key Quality Control Standards

4. Material & Surface Treatment Process

4.1 Raw Material

All rolled bushings and rolled support brackets are made of high-strength and high-elastic carbon steel, including 65Mn, SK5 and SK7. These materials have excellent toughness and wear resistance to adapt to long-term repeated rotation work.

4.2 Surface Treatment Options

• Environmental Nickel Plating: For conventional dry indoor environments, cost-effective and stable.

• Electroless Nickel Plating: Pass 54-hour salt spray test, suitable for indoor humid and high-temperature conditions.

• Zinc-Nickel Alloy & Chemical Black Nickel: High corrosion resistance, applied to outdoor and harsh working environments, also meets high-end appearance requirements.

5. Professional Selection Methods

5.1 Select by Size & Torque

Confirm the outer diameter, notch specification and required torque according to the internal structure space of your products, and select matched standard rolled parts.

5.2 Select by Working Environment

Choose different surface treatments based on usage conditions: use environmental nickel for dry rooms; select electroless nickel for humid and high-temperature areas; adopt zinc-nickel alloy for outdoor equipment.

5.3 Select by Product Structure

Choose rolled bushing for lightweight, small-torque shafts without locking demands. Select rolled support bracket for aluminum/zinc alloy shells, large torque and anti-rotation positioning structures.

If you need samples or technical consultation, please contact our professional engineers. You can find corresponding ERP part numbers from our standard specification table for quick ordering and sample application.

6. Mengpeng Hardware Service & Support

We provide complete standard rolled components and customized services. With sufficient inventory, fast delivery and strict quality inspection, we support bulk orders, OEM and ODM cooperation for global purchasers. Free samples and one-on-one technical selection guidance are available for all customers.