HL-A24 Compact Heavy-Duty Tandem Roller Assembly

The HL-A24 is a high-performance, compact tandem roller assembly engineered for aluminum sliding windows and medium-duty patio doors. Designed for installations where sash profile height and interior cavity space are constrained, the HL-A24 integrates a heavy-duty dual-wheel cart within a streamlined 71.2 mm carbon steel housing.

Equipped with a lateral adjustment mechanism, this assembly allows precise height calibration of ±3.1 mm, enabling installers to quickly level door and window sashes during mounting and maintain smooth, anti-derailment tracking over extended service lives.

Key Features

• Compact Tandem Architecture: Features a high-strength 71.2 mm housing that delivers the load-bearing stability of a dual-wheel assembly while fitting neatly into narrow profile tracks.
• Precision Vertical Adjustment: Integrated screw-driven alignment system provides ±3.1 mm of fine vertical lift, eliminating sash tilt and compensation issues caused by uneven building openings.
• Dual Ø25.5 mm Steel Wheels: Twin carbon steel rollers balance sash mass evenly across the rail, significantly reducing rolling friction and operational noise.
• Corrosion-Resistant Surface Treatment: Finished with an industrial-grade color zinc plating (passivated), protecting the assembly against moisture, atmospheric corrosion, and wear in everyday climate conditions.
• Optimized Track Compatibility: Precision-milled R3 groove profile with a 7 mm base width ensures seamless compatibility with standard extruded aluminum sliding rails.

Technical Specifications