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The Knape and Vogt 8500 Series 20 inch full-extension ball bearing file drawer slide is built for the demands of loaded file and lateral drawers, carrying 150 lb per pair while a hold-in anti-rebound detent keeps the drawer firmly closed between uses.
Standard kitchen and utility slides are rated in the 75–100 lb class and sized for boxes no wider than 24 inches. A fully loaded lateral file drawer regularly pushes past that range in both weight and width. The 8500 series is engineered for exactly that application: KV recommends it for drawers up to 36 inches wide, and the 150 lb class rating covers the kind of paper weight that would stress a lighter slide through daily cycling. The hold-in detent is equally practical here — file drawers closed firmly tend to rebound, and the detent ends that habit without requiring any closing mechanism that would conflict with a heavy pull.
The slide members are cold-formed steel with a zinc finish for indoor corrosion resistance. Zinc is the working standard for side-mount ball bearing slides: it protects the steel through years of daily service and sits mostly out of sight beside the drawer box. At the 20 inch length, the slide suits a drawer box in the 18–20 inch depth range common to office credenzas, lateral files, and built-in workstation storage. The poly-pack includes one pair with mounting hardware.
This slide fits best where the drawer carries real weight on a regular schedule — a lateral file in a home office, a legal-size drawer in a built-in workstation, or a deep storage drawer in a cabinet shop that handles daily pulls. The 20 inch length and 36 inch maximum recommended drawer width cover a wide range of standard lateral file configurations. For frameless cabinets the slide mounts directly to the side panel; for face-frame construction, add the matching KV rear mounting brackets sold separately, as the cabinet side sits back from the face frame and needs rear support.
No. The hold-in anti-rebound detent is a mechanical catch that keeps the drawer closed once it is pushed shut and stops it from bouncing back open. There is no damper and no spring assist — the drawer does not slow to a quiet close. If damped soft-close is a requirement, this is not the right slide.
KV recommends a maximum drawer width of 36 inches for the 8500 series. That covers most lateral file and wide storage drawer configurations at this load class.
Yes. In face-frame construction the cabinet side is recessed behind the frame, so the back end of the slide needs a rear mounting bracket for support. KV rear mounting brackets for the 8500 series are sold separately and are series-specific — do not substitute brackets from a different slide line.
The 8500 series drawer members use KV's quick-disconnect rail. Extend the drawer fully and the drawer member lifts free from the cabinet member without tools.
No. The design is non-handed, so both slides in the pair are identical. Order one pair per drawer regardless of which side each slide lands on.
When the drawer carries files and the load class matters, the 8500 series at 20 inches delivers the capacity, full extension, and stay-closed reliability that a standard cabinet slide cannot.
Sold In: 1 Set
