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The PRIME-LINE PRODUCTS N 6611 is a nail-down top pivot roller guide designed for bi-fold door installations. It features a spring-loaded nylon roller, 0.75 inches in diameter, mounted in a steel nail-down base. The guide keeps the top of a bi-fold door panel tracking smoothly in its overhead track throughout the full range of motion. This pack contains 2 units. It is compatible with door panels ranging from 1 inch to 1.375 inches thick, making it a practical replacement or new-install component for standard residential bi-fold door hardware setups. Carpenters, finish trim contractors, and general maintenance technicians are the typical installers.
This top roller guide is suited for residential bi-fold closet doors, pantry doors, and utility room doors where the existing top pivot guide has worn out or been damaged. The spring-loaded roller absorbs minor door movement and keeps panel alignment consistent under normal operating conditions. It is intended for interior door applications where a nail-down base can be secured into the door header track or jamb framing.
Fits bi-fold door panels ranging from 1 inch to 1.375 inches thick. Designed as an OEM-style replacement top pivot roller guide for standard residential bi-fold door track systems.
Installation is typically performed by carpenters or general maintenance technicians using standard hand tools. Before installing, ensure the bi-fold door panels are removed from the track to allow safe access to the header area. Secure the nail-down base fully into the track or framing to prevent guide movement during door operation. Do not force oversized door panels into the guide, as this can damage the nylon roller or deform the steel base.
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