1、 Core material: the foundation of durability and load-bearing capacity

Outer wheel material

Nylon fiber: has good noise reduction effect and is suitable for indoor sliding doors/windows, but has moderate wear resistance and a load-bearing capacity of ≤ 45kg. It is recommended to use lightweight doors and windows (such as wardrobe doors).

All copper/stainless steel: Strong load-bearing capacity (up to 120kg per wheel), corrosion-resistant, suitable for heavy or humid environments such as balconies and kitchens, but there may be slight noise when the copper pulley is pulled.

Polymer composite material: with the best comprehensive performance, wear-resistant, silent and anti-aging, it gradually replaces traditional materials and is suitable for scenes with high requirements for durability.

Avoiding pitfalls: Avoid pure plastic pulleys, which are prone to deformation and fracture, and have a very short lifespan.

Bearing material

Stainless steel bearings: rust proof, high smoothness, suitable for humid environments (such as bathrooms). Imported stainless steel bearings are preferred for tight installation without looseness.

Sealed bearings: dustproof and waterproof, reduce internal wear, extend service life, especially suitable for environments with high wind and dust.

2、 Structural design: adapted to the weight and stability of doors and windows

Single round vs double round

Single wheel: With a simple structure, it is suitable for lightweight doors and windows (weighing less than 45kg, such as small-sized sliding windows).

Double wheel/multi wheel: double load (up to 80-120kg), more stable, avoid shaking of doors and windows, recommended for heavy balcony doors or large size french window.

Adjustment function

Select pulleys with adjustable height to compensate for the gap between the door and the track, ensuring a tight fit and reducing noise and lagging

3、 Performance testing: intuitive judgment of quality

Smoothness: Manually push the pulley, high-quality bearings should rotate smoothly without obstruction, without any "creaking" noise, and have a soft touch.

Muteness: Nylon or composite material outer wheels with sealed bearings provide low noise during sliding, making it suitable for spaces with high requirements for quietness such as bedrooms and study rooms.

Load bearing test: Check the load-bearing parameters indicated on the product label. For heavy-duty doors and windows, thick alloy brackets with double wheel design should be selected to avoid deformation during long-term use

4、 Brand and after-sales service: long-term guarantee

Priority given to well-known brands such as Hehe Hardware, with more standardized craftsmanship and guaranteed materials to avoid "three no" products.

After sales policy: Choose products with a warranty of at least 1 year for easy maintenance or replacement in the future.

Summary of purchasing steps

Determine the type of doors and windows: light (single wheel+nylon/composite material), heavy (double wheel+stainless steel/copper).

Check material details: The outer wheel has no burrs, the bearings are not loose, and the bracket is made of thickened alloy or stainless steel.

On site testing: Smooth sliding without noise, flexible adjustment function