Monitor arm buying checks: screen weight, mounting pattern and desk fit

Quick answer

A monitor arm needs to match more than the screen diagonal. Check the display's weight without its original stand, its mounting-hole pattern, the arm's supported load range and the desk attachment. For two screens, repeat the checks for each screen and confirm how the maker defines the load limit. A large advertised capacity is not a substitute for a complete fit check.

This is a purchasing checklist, not installation instructions. Keep the screen on its existing stand until you have the correct arm manual and confirmed all mounting requirements.

Start with the screen, not the arm

Write down the complete monitor model, including its suffix. Find the manufacturer's weight without stand rather than using shipping weight or the weight of the assembled desktop monitor. Include accessories carried by the arm when checking its specified load. A light screen can also be outside a spring arm's supported range: the minimum matters as well as the maximum.

Record the mounting pattern in millimetres, such as 75 × 75 or 100 × 100. These describe spacing, not the screen size. Check whether the mounting area is recessed and whether the monitor maker requires a particular adapter. Do not assume a plate fits simply because its screw holes appear close. Fellowes' monitor-arm FAQ distinguishes display-only weight, mounting pattern and overall screen width.

The desk is part of compatibility

A clamp needs a permitted desk thickness and an unobstructed bearing area above and below. A rear frame, cable tray or bevel may prevent the clamp sitting as designed. A grommet mount needs a suitable existing opening and surface; it is not automatically a solution for every desk. Ask the desk manufacturer about glass, hollow or unusually thin tops rather than improvising reinforcement or drilling.

Measure the space between the desk and wall. An arm may need room behind the screen as it folds. Also record where the screen should sit when you are working: an arm that reaches a position on paper may not fit your actual desk layout without pulling the display too close.

Two screens add a width check

For a dual setup, screen width including bezels matters, not only diagonal size. Draw the intended arrangement to scale on paper: side by side, angled or stacked. Check that the arm supports that arrangement and enough separation. Do not divide a vaguely described total load by two and assume that is an approved per-arm limit.

A product to compare, with an unresolved detail

If you are comparing dual-screen options, inspect the NORTH BAYOU G32 dual-monitor arm listing. It states 22–32-inch displays and 75 × 75/100 × 100 mm patterns. It also gives a 2–15 kg load range without explicitly clarifying per-screen versus combined load. Confirm that distinction, clamp requirements and your exact monitors before ordering. The listing is a comparison starting point, not verified fit for your setup.

Your fit worksheet

• Monitor A/B exact models: ___ / ___.
• Display-only weight plus attached accessories: ___ / ___.
• Mounting pattern and recess/adapter requirement: ___.
• Arm's minimum and maximum load, clearly per arm or total: ___.
• Desk material, thickness and clear clamp area: ___.
• Screen widths, desired height and rear clearance: ___.
• Unanswered question to resolve with seller or manufacturer: ___.

Buy only when every required field has an answer. If the desk or screen is unsuitable, keeping the original stand is better than adapting an unverified mount. We have not load-tested this arm or certified any installation.