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The Knape and Vogt 8900 Series is a 36 inch full-extension side-mount ball bearing drawer slide rated 500 lb per pair, in a zinc finish — the practical, workhorse choice for shop cabinets, industrial storage, server enclosures, and any application where the standard 100 lb cabinet class falls well short of what the drawer actually carries.
Most side-mount ball bearing slides top out at 100 to 150 lb per pair — enough for kitchen drawers and file cabinets but nowhere near enough for a drawer full of hand tools, pneumatic equipment, or heavy hardware inventory. The 8900 series is built around a fundamentally heavier rail profile and bearing system that carries the load without flexing. At 36 inches of slide length with full extension, it suits deep shop cabinets, server and network rack drawers, industrial workstation pull-outs, and heavy-duty storage in production and maintenance environments. Standard motion means the drawer sits where it is pushed, which works well for trays and platforms that need to stay open during use without a hold-out mechanism. If the application calls for self-close or a stay-closed detent, a different variant in the 8900 family is the path — this SKU is the plain, free-sliding version.
Zinc electroplating is the right finish for a slide that lives inside a cabinet and takes mechanical use. It resists the surface corrosion that comes from handling, humidity, and incidental contact with cutting fluids or shop atmosphere, without the cost premium of stainless steel. On a 500 lb rated slide, the zinc finish is not decorative — it is functional protection on steel members that carry real structural loads. This is an indoor finish suited to temperature-controlled shops, commercial kitchens, server rooms, and industrial facilities. It is not rated for exterior exposure or continuous wet environments.
At 36 inches, this slide length is sized for deep cabinets: industrial base units, full-depth server racks, and large shop cabinet drawers where the box depth approaches or matches the slide length. Side-mount installation requires 3/4 inch of side clearance per side, so the drawer box must be built 1-1/2 inches narrower than the cabinet opening to accommodate both slides. In face-frame cabinet construction, rear mounting support is required at the back of the slide; use the matching series rear brackets, sold separately, and confirm they are specified for the 8900 series before ordering. The 8900 is non-handed, so a single part number covers both sides of the drawer.
Per pair. One pair of slides — one on each side of the drawer — carries 500 lb. That is the working load for the installation.
Full extension means the drawer member travels approximately the full slide length, bringing the entire drawer out to the cabinet face. The 36 inches describes the closed slide length, not a separate travel distance — for a full-extension slide, the two are close to the same, but slide length and travel are still distinct specs.
No. The 8900B 36 is a standard-motion slide with no closing mechanism of any kind. The drawer stays wherever it is left — no spring, no damper, no detent.
3/4 inch per side. Build the drawer box 1-1/2 inches narrower than the cabinet opening to leave the correct clearance for both slides. This is wider than the 1/2 inch clearance standard on lighter side-mount slides, so confirm box dimensions before cutting.
No. The 8900 series is non-handed — both slides are identical, and either one installs on either side of the drawer.
When the load exceeds what standard cabinet hardware is built to carry, the 8900 series at 500 lb per pair and 36 inches gives the drawer a foundation that matches the weight of the work — in zinc, in stock, and ready to install.
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