Description

Take on the heaviest garage doors with confidence using this Multi Spring Retractable Heavy Duty SA500 Gear Set, engineered to lift and support doors weighing between 400–500lbs (182–227kg). Designed for door heights ranging from 6’8″ to 7’5″, the AP500 Heavy Duty Lifting Gear is built for strength, reliability and long‑term performance.

This multi‑spring retractable system delivers smooth, balanced lifting, making it an ideal solution for large timber, steel or custom‑built doors. Whether you’re replacing an obsolete lifting mechanism or fitting new hardware to a purpose‑built garage door, this robust gear set provides the durability needed for heavy‑duty operation.

While capable DIY installers may be able to complete the installation, we strongly recommend hiring a specialist due to the weight and spring tension involved in fitting this type of system. Correct setup ensures safe use, proper balance and long service life.

Key Features

• Lifts doors up to 500lbs / 222kg
• Suitable for door heights between 6’8″ and 7’5″
• Heavy‑duty SA500 multi‑spring retractable design
• Ideal for large, reinforced or custom‑built garage doors
• Perfect for replacing obsolete retractable gear systems
• Built for maximum strength, stability and long‑term reliability
• Standard arm configuration for compatible installations

Ideal For

• Heavy, oversized or double‑width garage doors
• Replacing worn or unsupported heavy‑duty lifting gear
• Upgrading old retractable systems to modern, robust components
• Custom garage door builds requiring high‑capacity hardware

Please enquire for short arm (6’0″ to 6’8″) and high arm (7’5¼” to 9’0″) gear packs.

* Locking sets are NOT included in the Kits or Prices *