RCB1060-4U Rackmount 4U 23in to 19in Rack Reducer Adapter - Sturdy Fit

Our review of the RCB1060-4U Rackmount reducer finds it best suited to technicians and studio owners who need a reliable adapter to fit standard 19in equipment into older or wider 23in EIA310D relay racks. The single biggest reason to buy is its practical, no-nonsense engineering: upgraded 14 gauge CRS steel and a Z-shape offset deliver improved fit and load capacity so gear sits solidly in a converted bay. In this review the adapter proved straightforward to install and flexible enough for mixed rack hardware thanks to OB slots and preinstalled #10-32 PEM nuts.

Key Features

• 23in to 19in conversion: Lets standard 19in equipment be mounted in 23in EIA310D 2 post or 4 post racks without modification to the gear.
• 4U height: Provides four rack units of usable space while keeping a low profile and consistent alignment with existing rack rails.
• Z-shape offset design: The new offset improves fit and increases load capacity so heavier equipment is supported securely.
• Multiple mounting options: OB slots and 5.5mm holes accept #10-32, #12-24, and M6 hardware for flexibility with different rack screw standards.
• #10-32 PEM nuts preinstalled: One side ships ready to accept #10-32 screws for rapid attachment of equipment without extra hardware prep.
• Made in USA: Built locally with upgraded 14 gauge CRS steel for durability in demanding studio and server environments.

Who It's For

The RCB1060-4U is ideal for recording studios, broadcast racks, and IT closets that contain legacy 23in relay racks but need to accommodate modern 19in servers, routers, and audio gear. Installers who value a rigid, predictable adapter with multiple screw compatibility will appreciate the preinstalled PEM nuts and OB slot options.

Those who should look elsewhere include users who need a decorative front panel or integrated cable management features built into the reducer; this product focuses on structural conversion and load support rather than cosmetic extras.

Pros & Cons

Pros

• Sturdy construction from 14 gauge CRS steel and a Z-shape offset increases load capacity and improves alignment.
• Flexible mounting with OB slots and 5.5mm holes supporting #10-32, #12-24, and M6 screws for mixed equipment.
• Preinstalled #10-32 PEM nuts make equipment-side attachment quick and reliable.
• Universal fit for both 2 post relay racks and 4 post server racks reduces the need for custom parts.

Cons

• Purely functional appearance with no built-in cable management or decorative trim for visible rack fronts.
• Only available in discrete U sizes; you must choose the correct U height when ordering.

Specifications

Model	RCB1060-4U
Compatibility	Standard EIA310D 23in 2 post and 4 post racks
Converted width	Accepts standard 19in equipment
Height	4U
Material	14 gauge CRS steel
Mounting hardware	#10-32 PEM nuts preinstalled; supports #10-32, #12-24, M6
Finish	Black

Our Verdict

The RCB1060-4U is a practical, well-built rack reducer that suits professionals who must adapt 23in relay racks to modern 19in equipment. Its upgraded steel, Z-shape offset and flexible mounting options deliver dependable support and easy installation, making it a good value for studios and IT racks that prioritize structural reliability over styling.

Frequently Asked Questions

Will this mount in both 2 post and 4 post racks?
Yes. The adapter is designed for compatibility with standard EIA310D 23in 2 post relay racks and 4 post server racks.

What screw types can be used with the OB slots?
The OB slots and adjacent 5.5mm holes support #10-32, #12-24, and M6 rack screws for flexible mounting.

Does the equipment side include threaded nuts?
Yes. #10-32 PEM nuts are preinstalled on the equipment side to simplify attachment of 19in gear.