How to Install a Keyboard Tray on a Desk | Under-Mount Setup

Installing a keyboard tray requires mounting a glide track to the desk’s underside, attaching the mechanism, and securing the tray platform — with standing desks needing a spacer kit to clear the stability crossbar.

Mounting a keyboard tray under your desk frees up surface space and improves ergonomics, but the process needs more than just screws. The make-or-break details — track position, pilot hole depth, screw length, and crossbar clearance on standing desks — separate a rock-solid installation from one that fails within a month. Here’s how to get every step right.

Setting the Track Position and Drilling Pilot Holes

The mounting track goes ½ inch from the front edge of your desktop. This spacing lets the mechanism slide fully back without sticking out.

Use a 1/8-inch drill bit and wrap tape ½ inch from the tip as a depth guide. Drill each hole no deeper than that tape mark — going deeper risks a screw poking through the top surface. Insert the provided 5/8-inch wood screws but leave them about ⅛ inch loose; the track’s keyholes need room to slide onto the screw heads.

Once the track is aligned, tighten the screws and drill 4–5 more holes through the track’s remaining slots to secure it permanently.

Attaching the Mechanism and Tray Platform

Flip the desk over if needed, then screw the mounting bracket into place with the included Phillips hardware. — the bracket slides onto the track’s keyholes before final tightening.

With the bracket secured, attach the tray platform. Flip the desk back upright, install bumpers if included, and use the provided wire clip to keep loose cables from snagging during sliding.

A common gotcha: if your tray has a shipping pin holding the height adjustment, you must attach the tray board first — only then can the pin be removed and height adjusted.

Once installed, take a moment to test the full slide range. The tray should glide smoothly without binding, and the wire clip should keep cables clear of the mechanism.

Standing Desk Installation: Dealing with the Crossbar

Most standing desks include a stability crossbar that blocks standard keyboard trays. You have three real options:

• Use a spacer adapter kit — This builds an inverted overpass around the crossbar, letting you mount any conventional tray with a standard 5.765-inch glide track.
• Buy a tray designed for standing desks — Adjustable keyboard trays (AKTs) with spacer kits already integrated save the guesswork.
• Buy a desk with a built-in tray — Models like those with “SteadyType” systems come ready to go.

For the spacer route, most kits include longer machine screws and Acorn nuts that clear the crossbar height. Measure your desk’s crossbar depth before ordering —

Screw Selection and Desk Material Gotchas

The included 5/8-inch screws work fine on standard 1-inch desktops. But on thicker tables — say 1½ inches — swap to #12 x 1¼-inch screws.

Particle board is the real trap. Screws won’t hold in particle board without reinforcement. , then screw the tray into the plywood. This also works for any desktop under 1 inch thick that needs extra strength.

Start every screw by hand to avoid cross-threading, which ruins the hole. And here’s the critical torque rule: over-tightening the pilot screws prevents the track from sliding onto the keyholes — that loose 1/8 inch gap is by design.

Before You Buy: What to Measure

A quick checklist ensures your tray fits before drilling:

• Desktop thickness — under 1 inch needs plywood reinforcement
• Crossbar clearance — measure height from desk bottom to top of crossbar
• Minimum mounting depth — some trays need over 23 inches of clearance from front edge
• Wire paths — cables hanging below the desk can catch on the track

For a comparison of models that fit different desk types and budgets, check out our roundup of the best adjustable computer keyboard trays with real specs and mounting requirements.