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The Knape & Vogt 8505 series 28 inch over-travel ball bearing file drawer slide is a 150 lb class, side-mount slide that carries deep file and lateral drawers past full extension by 1 inch — enough to clear a countertop overhang or deep face frame and put the rear of the drawer within reach.
A standard full-extension file slide brings the drawer face flush with the cabinet opening, but anything deeper — a countertop overhang, a thick face frame, a deep apron rail — keeps the back of the drawer out of reach. This slide travels 1 inch past the nominal length, so the rearmost hanging files come all the way forward. At 28 inches, it suits deeper lateral file drawers and tall base cabinets where every inch of drawer depth is used. This is a side-mount slide: the hardware is visible beside an open drawer, which is the right trade-off when the priority is load capacity and access rather than concealment.
The slide is formed from steel and finished in zinc, the standard for indoor corrosion protection on ball bearing slide hardware. Zinc is a working finish suited to the inside of a file cabinet or base unit — not a decorative choice, but one that holds up through years of daily cycling. The poly-pack ships one pair with mounting hardware, ready for installation.
The 8505 series is KV's over-travel answer to the file and lateral drawer market. KV recommends a maximum drawer width of 30 inches for this series — narrower than the full-extension 8500, which accommodates up to 36 inches — so confirm the box width before ordering. Build the drawer box 1 inch narrower than the cabinet opening to provide the required 1/2 inch of side clearance for each slide. In face-frame cabinets, rear mounting brackets are required to support the back end of the slide; KV's matching brackets are sold separately and are specific to this series. The 150 lb class rating covers a lateral file drawer loaded with folders, but a standard kitchen cabinet slide in the 100 lb class is not the right substitute for this application.
No. Twenty-eight inches is the closed length of the slide. This is an over-travel design, so the drawer member actually travels past that length by 1 inch, bringing the full drawer content out past the cabinet face.
No. The hold-in anti-rebound detent is a mechanical catch that keeps the drawer closed and prevents it from bouncing back open — there is no damper and no spring to pull the drawer shut. The drawer closes by hand and stays put.
No. The 8505 series is non-handed — both slides in the pair are identical, so one part number covers both sides of the drawer.
Yes, but face-frame construction requires rear mounting brackets to support the back end of the slide. The brackets are sold separately and are specific to the KV series — do not substitute brackets from other product lines.
The drawer members use KV's quick-disconnect rail design. Extend the drawer fully, disengage the rail, and the drawer lifts clear of the cabinet without tools — useful for periodic cleaning in a heavily used file installation.
When the drawer runs deep, the load is real, and the overhang is in the way, the 8505 series 28 inch slide delivers the extension, the capacity, and the stay-closed reliability to keep a file drawer working day in and day out.
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