19" 1RU Rack Shelf for Yeastar P520 — Flat-Pack Kit, ABS-GF

A purpose-designed 1RU mount that gives the Yeastar P520 a permanent, serviceable home in a 19" rack. The unit sits on a braced shelf behind a full-width front panel, with its face flush in the cut-out window — status LEDs stay fully visible, nothing protrudes, and the rack front stays clean.

Supplied as a flat-pack kit in glass-fibre reinforced ABS. Choose shelf on the left or shelf on the right to suit your cabinet layout.

Engineered around the 1RU constraint

A single rack unit leaves only 41 mm of panel height to brace a 162 mm cantilever, which rules out the conventional diagonal strut. Instead, the two shelf side walls run full height where they meet the panel and taper to a 9 mm rear lip, working as tapered beams rather than struts.

Two details make the difference in service:

• Continuous support from the panel face. The panel's lower rail forms the front 5 mm of the shelf floor, so the unit is carried without a step or gap from the window rearward.
• Load taken in bearing, not in shear. The shelf floor's front edge lands on a ledge integral to the panel, transferring weight directly into the panel rather than hanging it off the fasteners.

Every component is oriented so working loads run within the print layers rather than across them. Under a 50 N load — the sort of force applied when seating a cable by hand — calculated stress at the shelf root is approximately 2.9 MPa against a material yield near 45 MPa, a safety factor of roughly 15.

Why glass-fibre ABS

Comms cabinets run warm, and a passively cooled PBX warms its own shelf. PLA softens from around 60 °C and creeps under sustained load, which is how a shelf ends up quietly sagging months after installation.

Glass-fibre reinforced ABS has a heat deflection temperature near 100 °C, minimal creep under long-term load, and roughly two and a half times the stiffness of PETG. The glass fibre also keeps the long flat panel sections dimensionally stable during printing.

The shelf floor and side walls are ventilated to suit the P520's passive cooling. Two slots are provided for a retention strap, with cable tie points behind the unit.

Left or right hand

Select which side of the rack the P520 sits on. The two versions are exact mirrors of one another and dimensionally identical — the choice is purely about cabinet layout and where the rest of your equipment lives.

What's included

Four printed components, flat-packed:

• Front panel, left half
• Front panel, right half
• Shelf assembly — floor, braced side walls and rear lip, printed as a single part
• Rear splice plate joining the two panel halves

Assembly

Approximately 20 minutes with a hex key. The panel halves butt together and are pulled straight by the rear splice plate; integral locating pegs set the alignment, so no measuring or shimming is required. Press twelve M3 nuts into their captive pockets, run the bolts in from the front where they seat flush in countersinks, and the assembly is complete.

🔧 Fasteners required — not included

Fasteners are not supplied. Most installers already hold M3 stock, and excluding it keeps the kit price down.

• 12 × M3 × 14 mm countersunk socket cap screws (DIN 7991)
• 12 × M3 hex nuts (DIN 934, 5.5 mm across flats)
• 4 × rack screws and cage nuts to suit your cabinet — M6 or 10-32 depending on the rack
• 1 × hook-and-loop strap, approximately 12 × 300 mm, for device retention

Specifications

Compatibility

Designed to fit the Yeastar P520 (160 × 160 × 30 mm). Window clearance is 0.25 mm per side, so the device face sits square in the aperture without slop.

This is an independently designed accessory. It is not manufactured by, affiliated with or endorsed by Yeastar.

⏱ Made to order

Each kit is printed to order. Please allow 5-7 business days before dispatch.