Humanscale M2.1 Monitor Arm
The Arm That Stays Put
The M2.1 is Humanscale's everyday monitor arm and the one we sell most of. Inside the arm is a mechanical spring, not a gas cylinder: it counterbalances the weight of your screen so the monitor rises, drops and swings with one finger and then stays exactly where you left it. Nothing creeps down over an afternoon, and there is no tension knob on the outside to be knocked out of adjustment.
Humanscale rates it for a single screen and publishes an overall height range of 7.6 to 17.5 inches, 360 degrees of arm rotation with an integrated stopper that can limit it to 90 or 180 degrees, 180 degrees of screen pan, and tilt of 80 degrees up and 15 degrees down. Shown here in polished aluminium with white trim.
The Mechanism
Where the Weight Goes
The counterbalance lives in the forearm. A coil spring works against the load so the force you apply is the same at the top of the travel as at the bottom — that is what makes a good arm feel weightless rather than springy. Because it is a spring and not a sealed gas cartridge, there is no seal to fail and no gradual loss of lift.
You set it once for the screen you own, using the adjustment inside the arm, and leave it. If you change screens later, you reset it in a minute.
The Details
Five Things That Make It an M2.1
The counterbalance, the quick-release VESA head, the rotation stopper, the cable channel and the clamp.
Spring Counterbalance, Not Gas
A coil spring in the forearm works against the load, so the force you apply is the same at the top of the travel as at the bottom. There is no sealed gas cartridge to lose pressure and no tension knob on the outside.
Quick-Release VESA Head
Bolt the plate to the monitor once and the screen lifts on and off the arm without tools. It is the difference between a five-minute screen swap and a twenty-minute one.
360° Rotation With a Stopper
The arm rotates a full 360° on the post, and an integrated stopper can limit that to 90° or 180°. Screen pan is 180°; tilt is 80° up and 15° down.
Cables Inside the Arm
Cables run inside the arm from the head to the post, so the only thing visible at the back of the desk is the loom going down.
Clamp Supplied, Grommet to Order
The clamp mount is in the box; a grommet fitting is available to order if the desk has a cable port rather than a usable edge. One hex key, no drilling, about ten minutes.
The Numbers
- Overall Height
- 7.6–17.5 in
- Screen Weight
- 5–22 lb (shop table)
- Maximum Monitor Width
- 44 in
- Arm Rotation
- 360°
- Tilt
- 80° up / 15° down
- Warranty
- 15 years
Figures are Humanscale's own, from its product page and shop specification table. The crops are Humanscale's product photography.
Mounting and Cables
Quick-Release Head and Cable Route
The screen hangs on a quick-release VESA plate: bolt the plate to the monitor once, then the screen lifts on and off the arm without tools. It is the difference between a five-minute screen swap and a twenty-minute one, and on a floor of hot desks it matters.
Cables run inside the arm from the head to the post, so the only thing visible at the back of the desk is the loom going down. Humanscale does not publish a VESA size figure for this arm; in practice it takes the 75 × 75 and 100 × 100 patterns that virtually every office monitor uses. Send us your model on 02 9640 0642 and we will confirm before you order.
Finishes and Mount
This Listing
Two finishes: black with black trim (M21BTBC) and polished aluminium with white trim (M21BTWCIND). Both are the clamp-mount single arm; a grommet fitting is available to order if the desk has a cable port rather than a usable edge.
If your screen is heavier than the M2.1's range, or you want two screens on one post, the M8.1 is the heavy-duty arm in the same family and takes a crossbar.
Why We Stock It
Humanscale has been making monitor arms since the 1980s and its mechanism is the reason we keep selling them: a spring counterbalance with no gas cylinder to lose pressure, so the arm that holds position on day one still holds it in year ten. That is also why the warranty is 15 years rather than the two or three that is normal for this category.
Humanscale Australia holds the stock, so we are not guessing at lead times, and the range shares one VESA head and one set of desk fittings across the arms — useful when a floor has a mix of screen sizes. Call 02 9640 0642 for a floor quote, or visit our Pyrmont showroom at 1/209 Harris Street to see what is on the floor.
Humanscale monitor arms
Built for Desks That Change Hands
A quick-release head, a spring that does not need re-setting and a 15-year warranty — the combination that makes an arm worth specifying across a whole floor rather than one desk.
Features & Specifications
Key Features
-Mechanical spring counterbalance — no gas cylinder; screen holds position with no tension knob on the outside
-Quick-release VESA head; screen lifts on and off without tools
-Arm rotation 360°, with an integrated stopper that can limit it to 90° or 180°
-Screen pan 180°; tilt 80° up and 15° down
-Internal cable management from the head to the post
-Clamp mount supplied; grommet fitting available to order
-Finishes: black with black trim (M21BTBC); polished aluminium with white trim (M21BTWCIND)
-Warranty 15 years (Humanscale)
Downloads
Humanscale — M2.1 monitor armLink →Humanscale APAC — M2.1Link →Humanscale — M2 Pro specification tableLink →Humanscale — M2 Pro line drawing (SVG)Link →Humanscale — warrantyLink →Dimensions
Overall Height7.6–17.5 in (Humanscale shop specification table)
Maximum Monitor Width44 in
Screen Weight5–22 lb per the shop specification table; Humanscale's product page states up to 15.5 lb. APAC publishes 2.3–7 kg flat and 2.3–5.7 kg curved
Arm Rotation360°; stopper limits to 90° or 180°
Screen Pan180°
Tilt80° up / 15° down
Product Weight10.6 lb
ScreensOne
VESA / desk thicknessNot published by Humanscale for this arm
Warranty15 years
Figures are Humanscale's own, from its product pages and the shop specification tables linked above. Where Humanscale's marketing page and its specification table differ we show both and say which is which. Humanscale does not publish a VESA size or a desk-thickness figure for these arms, so neither is stated here — ask us on 02 9640 0642 and we will measure one in the showroom. Warranty terms are on Humanscale's warranty page and our warranty page.
Frequently Asked Questions
Check three things: the screen's weight in kilograms (the number that matters most), its VESA hole pattern on the back, and your desk's thickness where the clamp goes. The weight range is in the specifications above; almost every office monitor is VESA 75 × 75 or 100 × 100. Humanscale's specification table gives 5 to 22 lb for this arm while its marketing page says up to 15.5 lb, so if your screen is near the top of that range tell us the model and we will check it against the arm before you order. If your screen has no VESA holes, a VESA adapter plate is usually available for it — send us the model on 02 9640 0642 and we will check before you order.
The M2.1 is the everyday arm for a single office monitor. The M8.1 is the heavy-duty one: Humanscale's table gives it 9 to 50 lb against the M2.1's 5 to 22 lb, a taller height range and a 60-inch maximum screen width, and it is the one that takes a crossbar for two screens. If you run a large or very heavy display, or you want two screens on one post, go to the M8.1.
Ten minutes with the supplied hex key for one arm. The clamp or grommet fitting goes on the desk first, the post drops in, the arm slides on, then the screen clips to the VESA plate. The only step worth doing carefully is setting the spring tension to the screen's weight before you let go of it — the instructions cover it and the specifications above list the adjustment.
The spring tension is set for the weight of your screen. If the arm rises on its own the tension is too high; if it sags it is too low. Turn the adjuster in the direction marked until the screen stays wherever you put it. It is a normal setup step, not a fault, and it needs redoing whenever you change screens.
Because of the mechanism and the term behind it. A spring counterbalance with no gas cylinder has nothing to lose pressure, and Humanscale backs it for 15 years rather than the two or three years usual in this category. Over a ten-year fit-out the cheaper arm is usually replaced twice. We also sell arms at lower prices — call 02 9640 0642 and we will tell you honestly which is right for the screens you have.
Humanscale publishes a 15-year warranty on this arm against defects in materials and workmanship in normal use. Claims come to Chair Dinkum on 02 9640 0642 and we lodge and manage them. Full terms are on Humanscale's site and our warranty page, and your Australian Consumer Law rights apply in addition.
Yes — visit our Pyrmont showroom at 1/209 Harris Street to see what is on the floor, and we can put a screen on an arm so you can feel the movement before you commit to a floor's worth. Call 02 9640 0642 first so we can have the one you want set up.
