Collection: Monitor Arm Mount

Which monitor arm mount do you actually need?

Most PC builders spend weeks agonising over a GPU and then bolt a brand new panel to the stock stand without a second thought. A monitor arm mount is the part that decides whether your Monitors sit at the right height and distance, and whether your desk is usable. The tiers differ in the mechanism, not the looks.

Entry-level arms use a fixed or friction-based joint, often with a mechanical spring. They suit lighter panels, typically up to around 6 to 8 kg, and once you set the height it mostly stays there. The trade-off is that adjustments can be fiddly, and if you're near the weight limit the arm may creep downward over time.

The sweet spot is a gas-spring arm. A pressurised cylinder balances the monitor's weight, so you can push the screen up, down, in or out with one finger and it stays put. Tension is adjustable, which is the real engineering difference. This tier usually handles 27 to 34 inch panels and gives you full tilt, swivel and rotation without tools.

Enthusiast arms are built for heavy ultrawides, such as 49 inch super-ultrawides at around 10 to 15 kg, or for dual-monitor setups on one pole. You're paying for thicker aluminium or steel extrusions, higher-rated gas cylinders, tighter tolerances at the pivot points, and better cable routing. Diminishing returns start when you pay for a premium finish on a lightweight 24 inch panel. Match the arm's rated range to your monitor's real weight, ideally landing in the middle of that range rather than at either end.

Upgrading and technical nuances

Check VESA first. Most arms support 75x75 and 100x100 mm hole patterns, which covers the vast majority of modern panels. Some curved or thin-bezel monitors have a recessed rear panel or a shallow VESA plate, so the screws sit too deep or the bracket can't seat flush. If that's the case, you'll need spacers, which good arms often include in the box.

Weight range matters more than the headline "max load". A gas-spring arm has a minimum as well as a maximum. Put a light panel on an arm tuned for heavy ultrawides and the arm will spring upward and refuse to sit still. This catches people who "future-proof" by buying an overbuilt arm.

For benchmark families, the Ergotron LX is the long-running sweet-spot gas-spring series, and the Ergotron HX is the heavier-duty line for big ultrawides. Atdec's Visidec range and Brateck's gas-spring arms are strong value options that are easy to find in Australia. Kensington's SmartFit arms are a solid pick if you want something simple for office-style setups.

Think about your mounting method too. A C-clamp suits most desks and is easy to move. A grommet mount goes through a hole in the desk and is more stable, but you need a suitable hole. Thin glass desks, hollow-core desktops and some standing desks with a cable tray lip can cause problems, because the clamp needs a solid, flat surface to bite into. Many arms have a minimum desk thickness of 10 to 15 mm and a maximum of around 80 mm.

If you're running two or three screens, check that your Graphics Cards / GPU has enough DisplayPort and HDMI outputs. It's also worth checking whether your Motherboards video outputs make sense for a secondary screen on an iGPU.

Practical things to check before buying

Measure the desk depth. A long arm needs room behind the screen for the pole and the arm's pivot, and a shallow desk against a wall may stop the monitor sliding back to a comfortable distance. Leave at least 100 mm behind the desk edge for the clamp.

Check the arm's reach and height. A taller pole matters if you're using a standing desk or sit-stand converter. Some arms rise high enough to put the top of the monitor at eye level for a tall user, others top out lower than you'd expect.

Cable management is a bigger deal than people think. Run the power and video cables through the arm channels, but leave enough slack for the full range of movement. A cable that's too short will pull on the monitor port whenever you move the screen. Consider longer DisplayPort or HDMI leads from Cables & Connectors before you finish tidying, and remember that high refresh rate panels need cables rated for the bandwidth.

If your PC sits near the arm's clamp, take a look at your Computer Cases footprint. A big tower under or beside the desk can block a clamp or the pole's swing path. For an all-in-one solution, a pre-built from Computers still needs the same VESA and desk checks for the display.

Finally, test the arm's movement before you commit to cable ties. Mount the monitor, move it through its range, and check the cables aren't being stressed at any point.

Brands and local warranty

Ergotron is the benchmark name for gas-spring arms and generally has long warranty terms. Atdec is an Australian-founded brand that's well supported locally. Brateck is a popular value option, and Kensington and Fellowes sit in the office-focused space. Many monitor manufacturers also sell their own arms, but they're usually basic.

Local warranty matters because arms are mechanical. Gas cylinders lose pressure, joints loosen, and a failure can drop a few hundred dollars of monitor onto your desk. Under Australian Consumer Law you have guarantees that don't depend on the manufacturer's paper warranty, but dealing with a local supplier makes replacements quicker. A genuine local warranty means you aren't paying international freight on a heavy arm to claim a faulty cylinder. Buy from a retailer that stocks the brand properly, and keep your receipt.

Frequently asked questions

How do I know if my monitor will fit a monitor arm mount?

Check the rear of the monitor for four screw holes in a square pattern, usually 75x75 or 100x100 mm, then compare your monitor's weight (without its stand) to the arm's rated range. If the panel has a recessed back, you may need the spacers that come with most arms.

Is a gas-spring arm worth it over a basic one?

If you adjust your screen often, or you share a desk, yes. The gas spring balances the weight, so adjustments are smooth and the arm holds position. For a monitor you'll set once and leave, a basic arm does the job.

Can one arm hold a 49 inch ultrawide?

Only if it's rated for the weight and width. Look for a heavy-duty arm, such as the Ergotron HX family or an equivalent, and check the rated load rather than just the stated screen size. Cheaper arms can sag under that weight.

Will a clamp mount damage my desk?

It can mark softer surfaces if you overtighten it. Use the supplied rubber pads or add a small plate for extra protection. Avoid clamping onto thin or hollow desktops without reinforcement.

Do I need a separate arm for each monitor?

Not necessarily. Dual arms on a single pole save desk clamps and space, but each screen still needs to sit within the arm's weight range. Two separate arms give you more independent positioning.