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This is the left-hand cabinet member from Knape and Vogt's 8500 series — an 18 inch, 150 lb class, full-extension ball bearing file drawer slide component designed for loaded file, lateral, and heavy storage drawers. It mounts to the left interior wall of the cabinet and pairs with the matching right-hand cabinet member and drawer members to form a complete, working pair.
A lateral file loaded with hanging folders, a deep storage drawer packed with binders, an office pedestal under daily use — these are the applications that push a standard 100 lb cabinet slide to its limit and beyond. The 8500 series is built around the reality that file drawers run heavier than kitchen drawers, and that the rear of the drawer needs to come all the way out. Full extension means the back of the 18 inch drawer reaches the cabinet face, so no folder is buried past the point of easy reach. The hold-in detent adds an important detail for high-traffic environments: the drawer stays shut when closed firmly, without bouncing back into the aisle or opening footprint.
The 8500 series cabinet member is cold-formed steel with a zinc finish — the standard corrosion-resistant surface for side-mount ball bearing slides used in indoor office and commercial settings. Zinc is a functional finish here, not a decorative one; it protects the steel members through the daily open-and-close cycles of an active file room. The progressive ball bearing system runs in full-length raceways, maintaining smooth, even travel as the weight of a loaded drawer shifts from closed to fully extended.
The 8500 series is designed for office file drawers, lateral files, and heavy storage drawers where the load regularly exceeds the standard cabinet class. At 18 inches, this slide suits shallower file pedestals and under-desk cabinets as well as deeper filing units. Build the drawer box 1 inch narrower than the cabinet opening to leave 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; these are series-specific and sold separately. KV recommends a maximum drawer width of 36 inches for the 8500 series at full load.
This part is the cabinet member that mounts to the left interior wall of the cabinet when you are facing the opening. To make a working pair, you need one left-hand cabinet member, one right-hand cabinet member, and two drawer members. All four components are separate line items in the 8500 series.
No. The hold-in anti-rebound detent is a mechanical catch that keeps the drawer firmly closed once pushed shut and prevents it from bouncing back open. There is no damper and no spring assist — the drawer does not slow on its own before closing. Soft-close is a separate, damped mechanism not present in this series.
The 8500 series uses quick-disconnect drawer members: the drawer member lifts free of the cabinet member without tools once the drawer is fully extended. This is a different disconnect type than the lever disconnect found on KV's standard 8400 series.
Yes, but the back end of the slide needs rear support in a face-frame cabinet. The matching rear mounting brackets are series-specific and sold separately — generic or 8400-series brackets will not fit.
The 150 lb rating is per pair — meaning the two cabinet members and two drawer members working together. Do not double the number by counting each slide individually.
When the drawer carries real weight and needs to come all the way out, the 8500 series left-hand cabinet member gives you the correct foundation — 150 lb class capacity, full extension, and a detent that keeps the drawer where you put it.
Sold In: 520 Each
