3" Heavy Wall Garage Door Pulley – 3/8" Bore – 200 lb Rated

The 3" Heavy Wall Garage Door Pulley is a heavy-duty replacement pulley designed for garage door extension spring systems where increased strength and durability are required.

Built with a reinforced heavy-wall design and a 3/8" center bore, this pulley is rated for up to 200 lb at 10,000 cycles on an 8-foot garage door. The gold-finished steel construction provides added corrosion resistance and makes it a strong replacement option for worn or damaged extension-spring pulleys.

Specifications

Key Features

• Heavy-duty 3-inch pulley

• Reinforced heavy-wall construction

• 3/8-inch bore

• Rated for 200 lb at 10,000 cycles on an 8' door

• Gold finish for improved corrosion resistance

• Designed for residential and light-commercial extension spring systems

• Suitable for replacing worn, bent, noisy, or damaged pulleys

• Fasteners sold separately

What the Pulley Does

In an extension-spring garage door system, pulleys guide the lift cables as the door opens and closes.

The pulley allows the cable to change direction smoothly while transmitting lifting force between the extension springs and the bottom of the garage door. A worn or damaged pulley can cause increased cable friction, noise, uneven door movement, or premature cable wear.

Common Applications

• Residential sectional garage doors

• Extension-spring counterbalance systems

• Replacement of worn garage door pulleys

• Garage door hardware rebuilds

• Preventive maintenance

• Light-commercial sectional doors using compatible extension-spring hardware

Compatibility & Fitment

Before ordering, verify:

• Existing pulley diameter is 3"

• Required bore size is 3/8"

• Existing system uses an extension-spring pulley configuration

• Required load rating is appropriate for the door

• Existing mounting hardware is compatible

Do not select a replacement pulley based only on appearance. Pulley diameter, bore size, load capacity, and mounting configuration should match the existing garage door hardware.

What's Included

• 1 × 3" Heavy Wall Pulley

Mounting bolt, nut, fork, and other fasteners are sold separately.

If a complete clevis-style assembly is required, select the appropriate heavy-wall clevis pulley kit instead.

Installation & Safety

Garage door extension springs and lift cables can remain under significant mechanical tension.

Before replacing a pulley, the door should be properly secured and spring tension safely controlled. Inspect the associated lift cables, forks, bolts, and spring hardware for wear at the same time.

Installation should be performed by someone experienced with extension-spring garage door systems.

3" Heavy Wall Garage Door Pulley – 3/8" Bore – 200 lb Rated

Heavy-duty 3-inch garage door pulley with 3/8-inch bore, gold finish, and 200 lb rating for extension-spring sectional door systems. Fasteners sold separately.