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The Knape and Vogt 8908 series is a 40 inch full-extension side-mount ball bearing drawer slide rated 500 lb per pair, with combined hold-in and hold-out detents that keep the drawer exactly where you put it — closed or fully open. The zinc finish makes this a practical workhorse for shop benches, server racks, industrial storage, and any drawer application where the load well exceeds standard cabinet class.
Five hundred pounds per pair is not a cabinet-grade load — it is a shop-grade load. This slide is at home under a machinist's top drawer loaded with precision measuring tools, inside a parts-room cabinet holding cast iron fixtures, beneath a server-room drawer carrying dense rack equipment, or in any industrial application where a standard 100 lb slide would be undersized from day one. The 40 inch length is long enough for deep industrial cabinets and full-depth equipment enclosures. Because the detents work in both directions, the drawer stays shut when you close it and stays open when you need both hands free inside it — no bracing, no prop.
Steel members carry the structural load; the zinc electroplate adds corrosion resistance for dry, indoor environments. Zinc is the standard working finish on heavy-duty ball bearing slides — it protects against incidental moisture and surface oxidation without the cost premium of stainless steel. The finish sits between the drawer box and the cabinet interior, mostly out of sight once the drawer is installed. This is an indoor slide; for wash-down, marine, or food-service environments where zinc plating is not sufficient, a stainless-finished model is the appropriate choice.
The 8908 series mounts one slide per side of the drawer box, one per side of the cabinet interior. Unlike the standard 1/2 inch clearance of lighter cabinet slides, this series requires 3/4 inch of side clearance per side — build the drawer box 1-1/2 inches narrower than the cabinet opening to account for both slides. The non-handed design means both slides install identically; no flipping or mirroring. In face-frame cabinets, rear mounting brackets are required to support the back of the slide — confirm bracket compatibility for the 8908 series before ordering, as brackets are series-specific.
This is a full-extension slide, so the drawer member travels approximately the full 40 inch slide length, bringing the entire drawer out past the cabinet face. Slide length and travel are the same spec on a full-extension three-member slide.
Yes, this slide has both. Hold-in is a detent that keeps the drawer closed and prevents it from bouncing back open after a firm push. Hold-out keeps the drawer in the fully open position until intentionally pushed closed. Neither feature is a lock — both release with a normal pull or push.
The 500 lb rating is per pair — one working drawer installation using both slides together. Do not double the number by counting each slide separately.
The 8908 series is a heavier-built slide carrying five times the load of a standard cabinet slide. The larger profile requires 3/4 inch of side clearance per side. Build to that measurement — a drawer box sized for a 1/2 inch clearance slide will not fit correctly.
No. The zinc finish protects against incidental indoor moisture but is not rated for outdoor, marine, or wash-down service. Use a stainless-finished slide for those environments.
When the drawer is heavy, the job is demanding, and a standard cabinet slide would fail under the weight, the 8908 series in zinc delivers full extension, dual-detent control, and a 500 lb per pair rating in a non-handed, field-ready format — ready to put to work the day it arrives.
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