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The Knape and Vogt 8500 series is an 18 inch full-extension side-mount ball bearing file drawer slide rated 150 lb per pair, built specifically for the loads that standard 100 lb cabinet slides cannot handle reliably. It is the right choice when the drawer carries hanging files, heavy paper stock, or dense shop contents that a kitchen-class slide would strain to support.
A lateral file drawer loaded with folders, a deep shop drawer full of hardware, a workroom storage drawer that never travels light — these are the applications that push past a standard cabinet slide's comfort zone. The 8500 series is engineered for this duty class, with a 150 lb per pair rating that gives a full lateral file drawer genuine headroom. Full extension means the drawer comes completely out to the cabinet face; nothing at the back requires reaching or guessing. The hold-in anti-rebound detent is particularly valuable in file and office environments: close the drawer firmly and the detent catches it, preventing the bounce-back that pulls a loaded drawer back open and leaves it ajar.
The slide is formed from steel with a zinc finish — the standard corrosion-resistant surface for side-mount ball bearing slides in indoor service. This is a functional finish on hardware that lives inside the cabinet beside the drawer box; it is not a decorative coating. The progressive ball bearing movement runs in full-length steel raceways, maintaining smooth travel even when the drawer is loaded to its rated capacity. The quick-disconnect drawer members allow the drawer to be removed in seconds for file audits, cleaning, or relocation.
The 8500 series fits 18 inch drawer boxes and installs with 1/2 inch of side clearance per side, so the drawer box is built 1 inch narrower than the cabinet opening. The 32mm hole pattern positions the cabinet members directly on the system holes in a frameless cabinet. For face-frame construction, the rear of the slide needs support — add the matching KV rear mounting brackets, sold separately. KV recommends a maximum drawer width of 36 inches for this series, which covers the full range of standard lateral file and storage drawer widths. The non-handed design means both slides in the pair are identical, simplifying layout and reordering.
Yes. The 150 lb per pair rating is the right class for a lateral file drawer carrying a full load of hanging folders, which can easily exceed what a standard 100 lb cabinet slide is designed to handle day after day.
It is a mechanical detent that holds the drawer in the closed position and prevents it from springing back open after a firm close. It does not pull the drawer shut — there is no spring assist or damper — but once the drawer is pushed home, the detent keeps it there until pulled.
Yes. Full extension brings the entire drawer out to the cabinet face so the back of the drawer is accessible without reaching inside the cabinet.
No. The design is non-handed — both slides in the pair are identical and fit either side of the drawer.
The rear of the slide needs support in a face-frame cabinet. Add the matching KV rear mounting brackets, which are sold separately and are series-specific to the 8500 line.
When the application is a file drawer, a heavy storage bay, or any drawer that routine cabinet slides were not designed for, the KV 8500 series brings the load capacity, full extension, and stay-closed reliability that keep the work moving without a second trip to the parts bin.
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