What a monitor arm actually changes
A monitor's stock stand occupies the prime center-back of your desk. Replacing it with an arm frees 10-20 cm of depth and unlocks height, tilt and reach adjustments. Matching the screen to your eye level gets easy, which feeds straight into less neck strain. For the monitor itself, see the monitor, keyboard & mouse guide.
Check first: can your desk take one?
- VESA mount: 75 x 75 mm or 100 x 100 mm screw holes on the monitor's back
- Desktop thickness: clamps typically fit 10-60 mm (check each product)
- Desktop material: hollow or particle board tops want a reinforcement plate
- Weight rating: monitor weight (without stand) within the arm's range
On thin or soft desktops, a reinforcement plate spreads the clamping force. Find reinforcement plates
Gas spring vs mechanical arms
Gas spring arms move with one hand and suit anyone who repositions the screen often - they are today's mainstream. Mechanical (screw-adjusted) arms need a tool each time but cost less; if you set the position once and leave it, they are plenty.
Choosing by maker
Ergotron: the default answer
Smooth motion and a 10-year warranty put it a head above the field. The LX series is the reference, around 15,000-20,000 yen. For daily repositioning and long service. Find Ergotron LX
Amazon Basics: the same design for less
Known as an Ergotron OEM with equivalent motion at a noticeably lower price. The only trade-off: a 1-year warranty. Find Amazon Basics arms
Domestic and budget: Green House, Sanwa Supply, HUANUO
From around 5,000 yen. Motion smoothness is what you pay for, but for a fix-and-forget setup they rarely disappoint. Dual-monitor arms are plentiful in this band, too. Find budget arms Find dual arms
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Frequently asked questions
Why mount a monitor arm at all?
To reclaim desk depth and gain height and tilt freedom. Matching the screen to eye level becomes easy, which reduces neck and shoulder strain.
Does it fit any desk?
Clamp mounts need a desktop 10-60 mm thick and reasonably solid. Hollow or thin tops should get a reinforcement plate.
Gas spring or mechanical?
Gas spring moves tool-free and suits frequent repositioning; it is the mainstream. Mechanical is cheaper but needs a tool, so it fits set-and-forget use.
Ergotron or Amazon Basics?
Motion performance is considered equivalent. Choose Ergotron for the 10-year warranty, Amazon Basics for the price (1-year warranty).
What is VESA?
The standard for mounting holes on a monitor's back - usually 75 x 75 mm or 100 x 100 mm. Nearly all arms support both.