Over-Travel File Drawer Slide Built for Heavy Loads and Tight Overhangs

The Knape & Vogt 8525 Series is a 20 inch side-mount ball bearing file drawer slide rated 175 lb per pair, with 1-1/4 inch over-travel and a hold-in anti-rebound detent. It is purpose-built for loaded file drawers, heavy lateral storage, and any installation where the drawer has to clear a countertop overhang or deep face frame to be fully usable.

Key Features

• 175 lb load rating per pair — handles a fully loaded lateral file or heavy storage drawer with margin to spare.
• 1-1/4 inch over-travel — the drawer travels 1-1/4 inches past full extension, clearing overhanging worktops so rear contents are actually reachable.
• Hold-in anti-rebound detent — a mechanical catch keeps the drawer closed after a firm push, preventing it from bouncing back open.
• Ball bearing construction on steel members — smooth, consistent travel under a full paper load without the sluggishness of roller slides.
• Non-handed design — both slides in the pair are identical; no left or right sorting at the bench.
• 1/2 inch side clearance — standard side-mount clearance fits the drawer box 1 inch narrower than the cabinet opening.

Where Over-Travel and File-Class Capacity Make the Difference

Standard 100 lb cabinet slides are undersized for a drawer loaded with paper. A lateral file full of folders can easily exceed that class, and a 175 lb rating gives the 8525 the headroom to handle the real working weight of a file drawer over years of cycling. The over-travel is equally practical: when the drawer sits under a countertop overhang or behind a deep face frame, a plain full-extension slide still leaves the rear of the drawer buried. The 1-1/4 inch of travel beyond full extension is what actually brings hanging files into reach. These two specs work together, which is why this slide belongs in file and lateral drawer installations rather than kitchen cabinet work.

Steel Construction and Zinc Finish

The slide members are formed steel with a zinc finish for indoor corrosion resistance. Zinc is the functional standard for side-mount ball bearing slides in office and cabinet environments — it protects the steel through years of daily cycling and sits out of sight beside the drawer box. This is not a decorative finish, and it is suited to dry indoor installations, not washdown or exterior environments.

Who Reaches for the 8525

Cabinet shops fitting out office furniture and file pedestals use this slide when client specs call for over-travel or when the face frame adds enough depth to make standard full-extension falls short. Contractors building workrooms and home offices with built-in lateral file sections specify it to keep the rear hanging positions usable. The 175 lb rating also makes it a workable choice for shop drawers carrying heavier tooling, provided the 1/2 inch side clearance fits the box. For face-frame cabinets, the back end of the slide needs rear support — add the matching KV rear mounting brackets, sold separately, and confirm they are the correct brackets for the 8525 series before ordering.

Common Questions

A File Drawer Slide That Finishes the Job

When the drawer sits behind an overhang and carries real weight, the 8525 pairs the load class and the extra travel to make both the installation and the day-to-day use work the way they should.