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The Knape and Vogt 8900 Series is a 30 inch full-extension side-mount ball bearing drawer slide rated at 500 lb per pair, finished in zinc, and designed for heavy-duty storage drawers, shop cabinets, and industrial installations where the standard 100 lb cabinet class falls well short.
At 500 lb per pair, this slide belongs anywhere a drawer carries genuine weight: a mechanic's tool chest, a production shop parts drawer, a commercial kitchen utility drawer, or a storage cabinet stocked with hardware. The full-extension design means the entire drawer — front to back — comes out past the cabinet face when open. On a 30 inch slide, that is a deep drawer fully exposed, not just the front two-thirds. Standard-motion design means there is no soft-close mechanism or spring to work against; the drawer stays wherever it is positioned, which suits work environments where the drawer stays open during a task.
Steel construction with a zinc plating gives the 8900 Series the corrosion resistance expected of a working shop slide. Zinc is the practical, durable standard for heavy-duty interior applications — not a decorative finish, but one that holds up through years of industrial use in dry, indoor environments. The zinc tone is neutral against most cabinet interiors, though the slide will be visible beside the open drawer box as with any side-mount design.
The 8900 Series requires 3/4 inch of side clearance per side — note this is wider than the 1/2 inch clearance on standard cabinet slides. Build the drawer box 1-1/2 inches narrower than the cabinet opening to account for both sides. The non-handed design simplifies the installation: pull two identical slides from the bulk pack and mount one on each side without checking orientation. In face-frame cabinets, rear support is required; add the appropriate rear mounting brackets, sold separately, to carry the back end of the slide.
That is the per-pair rating — both slides together carry 500 lb. Do not double it by counting each slide separately.
No. The 8900 Series uses standard motion — no damper, no closing spring. The drawer stays exactly where you leave it.
The heavier-duty construction of the 8900 Series results in a wider profile. Plan for 3/4 inch per side when sizing your drawer box — using a standard 1/2 inch clearance will cause a fit problem.
Bulk-pack means the slides are packed loose in a carton rather than in retail polybags. Confirm the unit quantity per pack at checkout — this format is intended for shop and trade orders, not single-pair retail.
The slide itself works in face-frame and frameless cabinets, but face-frame installs need rear mounting brackets to support the back end of the slide. Those brackets are series-specific and sold separately.
When the drawer load exceeds what standard cabinet slides are rated for, the 8900 Series in zinc delivers full extension and a 500 lb capacity in a non-handed, bulk-pack format built for professional volume installations.
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