The Ball Bearing Adjustable Height Mechanism is our premium track mechanism, featuring smooth ball-bearing glides for the quietest, lowest-effort tray movement available. Refers to the under-desk track that the mechanism slides along — measure the flat space beneath your worksurface (front to back) to choose the right track length.
Why Ball Bearing
- Smoothest possible glide — far less effort than nylon
- Higher load capacity
- Lifetime durability under heavy daily use
- Adjusts from flush to 6″ below worksurface
- Tilt range and 360° swivel
Choosing a Track Size
The longer the track, the further the tray tucks under your desk when not in use.
- 17″ — fits most desks 24″ deep or shallower
- 21″ — recommended for desks 30″ deep, allows full retraction
Note: All keyboard trays must be used in conjunction with an adjustable arm mechanism. This mechanism does not include the tray. 
