HL-A22 Heavy-Duty Adjustable Tandem Roller Assembly

The HL-A22 is a premium, high-load tandem roller assembly specifically engineered for heavy-duty architectural aluminum sliding doors and oversized window sashes. Featuring an extended 119 mm structural chassis and a centrally positioned alignment mechanism, this assembly delivers maximum weight distribution, minimizes rail friction, and ensures fluid, low-resistance sliding dynamics even under high glass-mass configurations.

Equipped with an integrated central adjustment gear, the HL-A22 allows installation teams to perform fine-tuned vertical calibrations of +/-4 mm. This ensures flawless squaring of heavy doors during on-site installation, resolving issues related to structural sagging or track tracking misalignments.

Key Features

• Extended Structural Chassis (119 mm): The lengthened housing geometry distributes vertical force across a wider segment of the track, preventing localized rail deformation and track pitting.
• Centralized Post-Installation Adjustment: A heavy-duty internal screw system provides a reliable +/-4 mm vertical lift mechanism, easily accessible for fast on-site leveling.
• All-Metal Dual Tandem Configuration: Equipped with twin Ø32 mm high-capacity wheels that double the structural footprint, allowing heavy double-glazed or triple-glazed door panels to slide effortlessly.
• Dual-Grade Metallurgy Options: Available in high-tensile Carbon Steel for high-volume commercial builds, or Grade 304 Stainless Steel (S.S. 304) for marine, coastal, or high-humidity applications requiring extreme rust resistance.
• Industrial Zinc Passivation: Finished with a specialized color-plated zinc coating that acts as a robust barrier against oxidation, atmospheric salinity, and industrial wear.

Technical Specifications