4" Extension Spring Pulley – 3/8" Bore
4" Extension Spring Pulley – 3/8" Bore
Replace a worn pulley in a compatible extension-spring garage door system with this 4" pulley. The pulley guides the lifting cable as the door moves and must remain properly aligned with the rest of the extension hardware.
Specifications:
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Pulley diameter: 4"
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Center bore: 3/8"
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Published cycle rating: 35,000 cycles on a 12' door
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Published load rating: 200 lb
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Fasteners: Sold separately
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Quantity: One pulley
Confirm the pulley diameter, bore size, cable path, and mounting arrangement before ordering. The published load and cycle ratings refer to the supplier’s test configuration and do not determine the capacity of the complete garage door system.
Inspect the lifting cable for broken strands, flattening, corrosion, or abrasion. Check the companion pulley, spring, track, and mounting hardware for wear and alignment problems.
Extension springs and lifting cables can remain under substantial tension. Have a qualified garage door technician secure the door and safely release spring tension before replacing the pulley.
After installation, verify smooth rotation, correct cable seating, and balanced door movement throughout the full travel.
4" Extension Spring Pulley with 3/8" Bore
Replacement 4" pulley with a 3/8" bore for compatible residential extension-spring garage door systems.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
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