Middle Atlantic FLR-FNDLY CBS20in. in. DPERK - CBS-ERK-20R

Middle Atlantic CBS-ERK-20R Caster Base for ERK Series Racks

The Middle Atlantic CBS-ERK-20R is a heavy-duty caster base designed specifically for ERK-series open-frame racks, adding 4 inches of rolling mobility to rack deployments where repositioning equipment without a full teardown is a real operational requirement. At a rated capacity of 700 lbs (317.5 kg), it handles fully loaded racks without compromise — useful in telecom closets, AV control rooms, and security operations centers where rack contents change over time. The CBS-ERK-20R (often searched as CBS ERK 20R) ships at 17.5 lbs and installs at the base of compatible ERK racks as a bolt-on foundation.

Overview

The CBS-ERK-20R belongs to Middle Atlantic's CBS caster base family, engineered to the Fine Floor style profile — meaning the caster contact points and base geometry are optimized for finished flooring environments like raised floors, epoxy-coated concrete, and tile. Its black wrinkle powder coat finish blends with standard ERK rack aesthetics and resists the scuffs and abrasion common in active equipment rooms. At 22 in wide × 20 in deep × 4 in tall, the footprint closely matches the ERK rack envelope, keeping the overall system compact rather than spreading the base beyond the rack rails.

Key Features

• 700 lb Weight Capacity: Supports 317.5 kg of rack-mounted equipment — enough for a fully populated 20U ERK rack loaded with NVRs, switches, and UPS units. You won't need to redistribute gear or leave bays empty to stay under a capacity limit.
• ERK Series Fit: Engineered specifically for Middle Atlantic's ERK open-frame rack line. This is not a universal fit base — the CBS-ERK-20R mounts to ERK mounting points, so rack-base alignment is precise and there's no shimming or adapter hardware required.
• 20-Inch Depth: At 50.8 cm deep, the base matches the ERK rack depth envelope. Equipment overhanging the front or rear of the rack frame has clearance without the base creating a tripping hazard or misaligned footprint.
• 4-Inch Height Profile: Adding only 10.2 cm of height, the caster base has minimal impact on usable rack height. If you're working with a fixed ceiling clearance or cable management arms at the top of the rack, 4 inches is a predictable and manageable addition.
• Fine Floor Style: The Fine Floor designation indicates the caster base design accounts for finished surfaces — relevant when deploying into executive briefing centers, operations centers, or any environment where floor protection and aesthetics matter alongside function.
• Black Wrinkle Powder Coat: The wrinkle texture finish is more forgiving of contact marks and minor abrasion than smooth powder coat. In active rack environments where cable management hardware and equipment edges frequently brush the base, this finish holds up without obvious wear.
• 15.5 lb Base Weight: The CBS-ERK-20R itself weighs 7 kg — substantial enough to add stability at the rack base without contributing unnecessary dead weight to a mobile deployment.

Integration & Compatibility

The CBS-ERK-20R is purpose-built for the ERK (Base Series: ERK) rack family from Middle Atlantic products. If you're sourcing an open-frame rack system and need to add floor mobility without fabricating a custom base, this is the direct-fit solution for ERK configurations. Confirm your ERK rack model's caster base compatibility before ordering — Middle Atlantic produces multiple CBS variants for different rack series, and cross-series fitment is not guaranteed. For rack infrastructure planning, reviewing a rack planning guide covering rack depth, base clearance, and cable routing is worthwhile before finalizing a mobile rack configuration. Pair the CBS-ERK-20R with a compatible rack accessory such as a rack-mount UPS or cable management panel to complete the installation.

Frequently Asked Questions

Q: What is the weight capacity of the CBS-ERK-20R?

A: The CBS-ERK-20R is rated for 700 lbs (317.5 kg), which is sufficient for a fully populated ERK open-frame rack including NVRs, switches, and power equipment.

Q: Which rack series is the CBS-ERK-20R compatible with?

A: The CBS-ERK-20R is built for Middle Atlantic's ERK series open-frame racks. It is not a universal caster base — confirm compatibility with your specific ERK rack model before ordering.

Q: How much height does the CBS-ERK-20R add to a rack installation?

A: The CBS-ERK-20R adds 4 inches (10.2 cm) of height to the rack footprint. Factor this into ceiling clearance and cable arm calculations before installing.

Q: What finish does the CBS-ERK-20R use?

A: The base features a black wrinkle powder coat finish, which is durable against contact abrasion and matches standard ERK rack aesthetics.

Q: What does the Fine Floor style designation mean?

A: Fine Floor indicates the CBS-ERK-20R's caster base geometry is designed for use on finished flooring surfaces such as raised floor tiles, epoxy-coated concrete, and similar environments where floor protection and rack aesthetics are considerations.

Q: What are the physical dimensions of the CBS-ERK-20R?

A: The CBS-ERK-20R measures 22 in wide × 20 in deep × 4 in tall (55.9 cm × 50.8 cm × 10.2 cm) and weighs 15.5 lbs (7 kg).

Jerry Tildsen

The CBS-ERK-20R is a straightforward bolt-on mobility solution for ERK-series open-frame racks, and the 700 lb rated capacity is the spec that actually matters here — it means you can roll a fully loaded rack rather than unloading it first every time you need access to the back of the cabinet or need to reposition in a room reconfiguration. I've seen integrators underspec caster bases and end up with a deflection problem at the base that compromises cable management and leveling over time; the CBS-ERK-20R eliminates that concern for any realistic ERK rack load.

Technical Highlights:

• 700 lb Load Rating: At 317.5 kg capacity, this base handles a worst-case-loaded ERK rack — dense NVR, UPS, and switching gear — without approaching the rated limit. Staying well under rated capacity extends caster and base hardware life in environments with frequent repositioning.
• 4 in Height Addition: The 10.2 cm base height is a fixed variable you need to account for in rack layout. For installations in rooms with low-clearance cable trays or top-of-rack cable managers, verify total rack-plus-base height before committing to a room layout.
• Fine Floor Caster Style: The Fine Floor designation is relevant specifically when deploying into finished environments. In a rough concrete server room the distinction matters less, but in a finished operations center or executive briefing room it affects both floor protection and the professional appearance of the installation.

Deployment Considerations:

• Confirm your specific ERK rack model lists the CBS-ERK-20R as a compatible caster base before ordering — Middle Atlantic produces CBS variants for multiple rack series, and cross-series fitment is not supported.
• The 4 in height addition is fixed; there is no adjustable-height variant implied by the specs. If you need a lower profile or height-adjustable base, evaluate alternate CBS family options matched to your ERK rack configuration.

The CBS-ERK-20R fits best in security operations centers, network closets, and AV control rooms built on finished flooring where ERK racks need periodic repositioning — particularly in environments where full rack teardown to move equipment is operationally disruptive.