Middle Atlantic Caster Base, 31"D, DRK Series

The Middle Atlantic DRK Series recessed caster base is engineered to give you mobile, flexible rack setups without sacrificing interior space or front-end clearance. Designed to fit inside standard racks, these recessed bases increase the overall rack height by only 15/16 of an inch, preserving footprint while delivering reliable mobility. Ideal for pro audio, broadcast, post-production, and data center environments, the DRK Series caster base combines commercial-grade durability with practical engineering to support heavy equipment and constant use in demanding settings.

• Recessed design fits inside the rack to maintain a clean, professional look and minimize external footprint.
• Minimal height increase—only 15/16"—so you retain ergonomic access and stable footprint without overloading the room’s clearance.
• Heavy-duty 3" non-locking swivel wheels provide smooth movement and resilient performance, supporting demanding equipment loads.
• Pre-installed wheels simplify setup; these bases are designed to work with LF leveling feet for flexible height adjustment and leveling on uneven floors (see page 31).
• Commercial-grade construction delivers lasting durability in busy studio, broadcast, and AV environments, ensuring dependable mobility over time.

Technical Details of Middle Atlantic Caster Base, 31"D, DRK Series

• Depth: 31 inches (fits inside DRK-series racks for a recessed, streamlined appearance)
• Wheel size: 3 inch wheels
• Wheel type: Heavy-duty non-locking swivel wheels
• Weight capacity: 1,300 lb total capacity
• Height increase: Adds 15/16 inch to rack height
• Compatibility: Recessed base designed to work with LF leveling feet (see page 31)
• Wheels: Pre-installed on each base for ready-to-use mobility
• Materials/finish: Commercial-grade construction noted in product description
• UPC/SKU: Not provided in the current product data

How to install Middle Atlantic Caster Base, 31"D, DRK Series

Preparing for installation begins with confirming rack compatibility and interior clearance. The DRK Series recessed caster base is designed to drop inside the rack cavity, so you’ll want to verify that your enclosure depth and interior rails accommodate a 31" base with wheels. Position the caster base along the interior bottom of the rack, aligning the caster wells with the rack’s base structure. Slide the base into place carefully, ensuring the wheels remain oriented toward the exterior so they can roll freely when retracted into the rack. If you plan to level the rack using LF leveling feet, install the LF feet according to the manufacturer’s guidelines prior to final positioning. Once in place, gently rock the rack to confirm stable contact on the wheels and verify that the base sits flush with the rack’s interior bottom. Tighten any necessary mounting hardware as specified by Middle Atlantic’s installation instructions to secure the base firmly inside the rack. Finally, test mobility by pushing the rack gently across the floor, ensuring the swivel wheels rotate smoothly and the load remains balanced. The DRK base arrives with wheels pre-installed for immediate use, and it is designed to work in tandem with LF leveling feet to tailor height and leveling to your workspace.

Frequently asked questions

• What is the height increase when installing the DRK Series caster base?
  Answer: 15/16 inch.
• What is the load capacity of the caster base?
  Answer: 1,300 pounds total capacity.
• Are the wheels locking or non-locking?
  Answer: The DRK Series uses heavy-duty non-locking 3" swivel wheels.
• Does the base fit inside the rack or outside?
  Answer: The caster base is recessed to fit inside the rack, minimizing external height and preserving a clean rack appearance.
• Is LF leveling feet compatible with this base?
  Answer: Yes, the recessed caster base works with LF leveling feet (refer to page 31 for details).