40 Inch Full-Extension Drawer Slide for Serious Load Work

This is a 40 inch full-extension side-mount ball bearing drawer slide from Knape and Vogt's 8900 series, rated 500 lb per pair in a zinc finish. Built for drawers that carry genuine industrial or commercial loads, the 8900 series delivers full drawer access and a standard-motion, no-mechanism design that stays out of the way and holds up under repeated heavy use.

Key Features

• 500 lb load rating per pair — capacity well beyond the standard cabinet class, suited for shop, industrial, and heavy storage drawers.
• Full extension — the drawer travels the full slide length, clearing the cabinet face so the entire interior is reachable.
• 40 inch slide length — sized for deep drawers in workbenches, tool cabinets, and heavy-duty casework.
• Non-handed design — identical slides fit left and right, so there is no sorting on the bench before installation.
• Zinc finish on steel — corrosion-resistant indoor finish that holds up through hard use without adding visual weight to the installation.
• Standard motion (no closing mechanism) — free-sliding action with no soft-close, self-close, or detent; the drawer stays where it is left.

Built for Deep, Heavy Drawers

A 40 inch slide is not a kitchen drawer choice — it is the right tool for a deep workbench with steel parts inside, a commercial cabinet loaded with tools, or any institutional installation where the drawer depth and the carried weight both exceed what a standard 100 lb cabinet slide can handle. Full extension at this length means even the back of a deep, fully loaded drawer comes out to the cabinet face. The zinc finish blends quietly into the surrounding steel or painted interior, keeping the hardware functional without drawing attention to itself.

Steel, Zinc, and Standard Motion

The 8900 series is built from steel with a zinc electroplate finish that provides reliable indoor corrosion resistance. Zinc is the working standard for heavy-duty side-mount ball bearing slides: it protects without adding bulk, and on a slide this size the priority is structural performance over aesthetics. The standard-motion design is a deliberate choice in this duty class — no soft-close damper, no spring, no detent means nothing to wear out or interfere with a high-cycle industrial workflow. The drawer rolls freely on steel ball bearings through its full travel on 3/4 inch of side clearance per side.

Shops and Commercial Installations

The 8900 series at 40 inches is the right fit for cabinet shops building out heavy workbench drawers, facilities teams installing industrial storage, and contractors sourcing slides for commercial casework where a 500 lb rating is the specification requirement rather than a precaution. If the project calls for a free-sliding heavy-duty slide in a deep box with a zinc finish, this is the size to specify. Note that this slide 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. In face-frame cabinets, rear mounting brackets are required for back support; those brackets are sold separately and must be matched to the 8900 series.

The Right Slide for the Heaviest Drawer in the Shop

When the drawer is deep, the load is real, and the finish needs to hold up without fuss, the zinc 8900 series at 40 inches covers the specification cleanly — 500 lb capacity, full extension, standard motion, and no-mechanism reliability built into every pair.