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The Knape and Vogt 8505 series is a 28 inch over-travel side-mount ball bearing file drawer slide rated 150 lb per pair, built for loaded file and storage drawers that need to clear countertop overhangs or deep face frames. The over-travel action carries the drawer 1 inch past full extension, and a hold-in anti-rebound detent keeps it firmly shut between uses.
A standard full-extension slide stops at the cabinet face. The 8505 goes 1 inch further, which matters when the drawer sits under a countertop overhang or behind a face frame that pushes the opening back from the front edge. That extra travel is what separates reaching the hanging files at the back of a lateral drawer from having to dig for them. At 28 inches, this length suits deep base cabinets and lateral file pedestals where drawer depth is matched to letter- or legal-size hanging folders. The hold-in detent adds a practical benefit in office and shop settings: a fully loaded drawer does not rebound after closing, which protects contents and removes the need to push the drawer a second time.
The 8505 series is built from steel with a zinc finish — the working standard for side-mount ball bearing slides in commercial and office cabinetry. Zinc provides reliable indoor corrosion protection and a neutral appearance that sits unobtrusively beside the drawer box. The slide profile on the 8500 series runs taller than a standard cabinet slide to accommodate the quick-disconnect drawer member rail; account for that height when sizing the drawer box opening.
Choose the 8505 when two conditions apply: the load exceeds what a standard 100 lb cabinet slide handles, and the drawer needs to clear something in front of it when open. KV rates this series for drawer widths up to 30 inches, which covers most lateral file and deep storage applications. The 1/2 inch side clearance requirement per side is standard for ball bearing side-mount slides — build the drawer box 1 inch narrower than the cabinet opening. In face-frame cabinets, the back end of the slide needs rear mounting bracket support; those brackets are series-specific and sold separately. The Bulk-Pack format suits cabinet shops running multiple file pedestals or storage units in a single project.
No. The 28 inch measurement is the closed slide length. The drawer travels the full slide length plus 1 additional inch of over-travel — slide length and drawer travel are two different specs.
It is a mechanical catch that holds the drawer in the closed position and prevents it from bouncing back open. It does not pull the drawer shut the way a self-close spring does, and it does not slow the close the way a soft-close damper does — it simply holds the drawer where you leave it.
No. The 8505 is non-handed — both slides in the pair are the same part. Order one pair per drawer.
Yes, but the back end of the slide needs support. Face-frame cabinets require rear mounting brackets because the cabinet side is set back from the face frame. The brackets are 8500-series-specific and sold separately.
The 8500 series uses KV's quick-disconnect drawer member rail. The drawer lifts free without tools once the slide is extended.
The 8505B 28 covers the two scenarios a plain full-extension slide does not: a load that exceeds the standard cabinet class, and a drawer that needs to push past an overhang to give real access. Order by the pair for standard installs, or pull from the Bulk-Pack for multi-unit projects.
Sold In: 5 Set
