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Humanscale 900 Standard Keyboard Tray - Design Your Own

item#: HUS051
The Humanscale 900 Standard Keyboard Tray is an essential part of an ergonomic workstation. An ergonomic keyboard tray is designed to ensure that users type and mouse in a correct, neutral position while staying oriented to the task at hand. Select a mechanism, mouse platform and other features to suit your individual needs. Want your keyboard tray fast and can't wait the 5-7 day lead time? Check out our Humanscale Keyboard Tray Same Day Ship Models. Humanscale keyboard trays are manufactured in the USA.

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This item is currently shipping in 2-3 weeks.
Need it faster? The UPLIFT Large Keyboard Tray and UPLIFT Switch Keyboard Tray are great replacements that ship out the same business day, if ordered before 3pm CST.

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  • A FREE Goldtouch Go! Travel Notebook and Tablet Stand - View your tablet or laptop in a more comfortable ergonomic position with this lightweight, adjustable stand, which can also be used as a document holder.
  • A FREE UPLIFT CPU Holder - Clear up desktop space and keep your computer tower off the floor by mounting it to the underneath of your desktop. This accessory is great for height-adjustable desk users.
  • A FREE UPLIFT Single Monitor Arm - Mount a monitor weighing between 4.5 lbs - 17.5 lbs, and adjust the height, depth or lateral position with easy fingertip adjustment.
  • $25 INSTANT savings on your order

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The mechanism is the arm that controls the in-and-out movement, the height range and the tilt angle of your keyboard platform. All of the Humanscale keyboard tray mechanisms offer independent height and tilt adjustment with varying levels of height adjustment and standard track lengths. The 6G and 5G mechanisms are the most popular and suit a variety workstation needs; they are strong and durable, easy to use and offer a good range of motion. The 6G is the newest Humanscale keyboard tray mechanism that offers a more streamlined design than the 5G. The 5GSM offers the same functionality as the first two but for limited depth desks. The rest of the mechanisms offer special features, like the AD for above desk applications or the DS for users who need two points of adjustment for facing different directions.

Humanscale 6G Keyboard Tray Mechanism

Humanscale 6G Keyboard Tray Mechanism

  • Humanscale's newest dial-a-tilt mechanism that instantly adjusts the platform's tilt without the need to lock or loosen any knobs or levers
  • New design is much slimmer than the 5g

6G Specifications

Height adjustment 7": 1.75" above track to 5.25" below track
Track length Comes standard with 22" track

Humanscale 5G Keyboard Tray Mechanism

Humanscale 5G Keyboard Tray Mechanism

  • Dial-a-tilt mechanism instantly adjusts the platform's tilt without the need to lock or loosen any knobs or levers
  • Solid build quality and simplicity make this mechanism the most popular accessory they offer

5G Specifications

Height adjustment 6.25": 1.25" above track to 5" below track
Track length Comes standard with 22" track

Humanscale 5GSM Keyboard Tray Mechanism

Humanscale 5GSM Keyboard Tray Mechanism for Limited Depth Desks

  • For desks with limited depths or small spaces
  • Goes 4" farther underneath a desk surface, getting a keyboard tray stored out of the way on a shorter track

5GSM Specifications

Height adjustment 4": 0.5" above track to 3.5" below track
Track length Comes standard with 18" track

Humanscale 5GAD Keyboard Tray Mechanism

Humanscale 5GAD Keyboard Tray Mechanism

  • Greater-than-average adjustment range is ideal for sit-to-stand workstations
  • Steel construction for stable keying and mousing

5GAD Specifications

Height adjustment 13.5": 7.5" above track to 6" below track
Track length Comes standard with 27" track

Humanscale 4G Keyboard Tray Mechanism

Humanscale 4G Keyboard Tray Mechanism

  • Older version of the 5G mechanism
  • Dial-a-tilt feature offers keyboard angle adjustability

4G Specifications

Height adjustment 6.25": 1.25" above track to 5" below track
Track length Comes standard with 22" track

Humanscale 4GAD Keyboard Tray Mechanism

Humanscale 4GAD Keyboard Tray Mechanism for Above Desk Use

  • 4G with a longer arm for use above a work surface
  • Great for sit to stand solutions

4GAD Specifications

Height adjustment 11.5": 8.5" above track to 3" below track
Track length Comes standard with 27" track

Humanscale 2G Keyboard Tray Mechanism

Humanscale 2G Keyboard Tray Mechanism

  • Loosen knob to adjust and lock back into place
  • No reference for keyboard platform angle like the 5G or 6G

2G Specifications

Height adjustment 6.25": 1.25" above track to 5" below track
Track length Comes standard with 22" track

Humanscale KM Keyboard Tray Mechanism

Humanscale KM Keyboard Tray Mechanism

  • Pre-set 0° tilt
  • Knob-free adjustment

KM Specifications

Height adjustment 6.25": 1.25" above track to 5" below track
Track length Comes standard with 22" track

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Lateral Slider

All Humanscale mechanisms pivot 360 degrees from the point where it is mounted to the track. Some users have a need for additional side-to-side adjustability. The lateral slider provides for eight extra inches of movement from right to left. This is a useful feature for someone at a large workstation that requires them to type facing different angles or monitors.

Humanscale Keyboard Tray Lateral Slider

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Track Length

The track mounts to the underside of your work surface. It directs and supports the Humanscale mechanism and keyboard tray as it slides forward and back. Standard length on most mechanisms is 21 5/8 inches. That length ensures that the keyboard tray can be completely stowed under your desk when not in use. Some mechanisms come standard with a shorter or longer track. Consult each description for that information, but all systems can be ordered with any track length.

Track Lengths

All keyboard tracks mount underneath the surface of the desk

  • 11"
  • 14"
  • 16"
  • 18"
  • 21.625"
  • 25"
  • 27"

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Mouse Platform

Clip Mouse - Mousing Platform

Humanscale Clip Mouse

The clip mouse platform is the only mouse platform that allows the user total adjustment control in all three dimensions- height, depth, forward/back and tilt, allowing it to be adjusted precisely the way you need it. It also easily snaps onto either side of the tray for left or right use, and it's available in two sizes and different height ranges.

Note: The high clip has an extra one inch height for additional adjustment and usability and is the most popular accessory we sell.

  • 90: 8.5" diameter
  • 90H: 8.5" diameter high
  • 91: 10" diameter
  • 91H: 10" diameter high
  • 90H90H: 8.5" diameter high - Dual platforms for left and right
  • 91H91H: 10" diameter high - Dual platforms for left and right

Swivel Mouse - Mousing Platform

Humanscale Swivel Mouse

The swivel mouse mounts underneath either the left or right front corner of the platform. It swivels out from underneath the keyboard platform easily and tucks out of the way when not in use. This mouse platform is available in right, left and dual configurations. The main difference between the clip mouse and swivel mouse is the adjustability. The swivel platform stays on the same tilt or angle as the keyboard tray; the clip mouse angle can be adjusted independently.

  • 11R: 8" swivel right
  • 11L: 8" swivel left
  • 11D: 8" swivel dual
  • 12D: 10" swivel dual
  • 12R: 10" swivel right
  • 12L: 10" swivel left

M2 Mouse - Mousing Platform

Humanscale M2 Mouse

The M2 offers all the advantages of the swivel mouse, but it is slightly larger and offers a uniquely shaped platform. This lets a user bring the mousing surface closer to their body for a lower risk mousing position.

  • 81R: M2 right
  • 81L: M2 left
  • 81D: M2 dual

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Mouse Pad

The Humanscale 900 Keyboard Tray can be ordered with a mouse pad to match any of the available mousing platforms.

MPGEL8 8.5 inch Gel Mouse Pad for 8.5 inch swivel platforms
MPGEL10 10 inch Gel Mouse Pad for 10 inch swivel platforms
CMPGEL8 8.5 inch Gel Mouse Pad for 90 or 90H clip mouse
CMPGEL 10 inch Gel Mouse Pad for 91 or 91H clip mouse

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Second Mouse Pad for Dual Mouse Platforms

Add a mouse pad to your optional second mouse platform if desired.

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Palm Rest

Humanscale's palm rests are available in multiple sizes and thicknesses.

Palm rest lengths available for this tray: 19"

Select from four different palm rest options for your 900 keyboard tray: All are covered with an easy to clean, black synthetic leather.

The 19 inch slim gel palm rest with synthetic leather cover is only about a quarter of an inch thick and is available in black or silver. Slim palm rests are not compatible with swivel mouse platforms.

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  • Details
  • Accessories

The Humanscale 900 Standard Keyboard Tray design ensures that users type and mouse within their neutral reach zone, creating a safe, comfortable and sustainable work environment. The neutral zone in a standard office workspace is defined as the area where a user sits and works at a desk and can easily reach and interact with surrounding computer accessories, including a keyboard and mouse. Unlike older generation keyboard and mouse solutions, Humanscale keyboard trays are designed to ensure that nearly all users are able to work consistently within their Neutral Reach Zone, and thus maintain a low-risk posture.

Features - Humanscale 900 Standard Keyboard Tray

  • Keyboard trays are easily configured to meet specific needs
  • 900 Standard Keyboard Platform is made of phenolic: it's an ultra-strong, remarkably thin (1/4”) composite that is non-toxic, durable and easy to clean
  • Humanscale keyboard trays are the highest quality on the market and carry a 15 year warranty
  • The 900 platform design supports nearly all standard keyboards and will fit most desks using the variety of tracks lengths available; see the Options tab for more details.

Humanscale 900 Standard Keyboard Tray Specifications

Mechanisms 9 adjustable arms to choose from
Track lengths 11" - 27" for varying desk depths
Mousing surface 13 clip-on and swivel options
Palm rests Available in foam or gel
Platform dimensions 19" W x 10.625" D
Warranty 15 year warranty

See this product in action

Neutral Reach Zone Description

"The neutral reach zone is the area that can be conveniently reached with a sweep of the forearm while the upper arm hangs in a natural position at the side." (Sanders & McCormick, 1993)


Video Review - Humanscale Keyboard Tray Systems

Check out our video review of the Humanscale Keyboard Tray Systems below.

The Human Solution is an authorized Humanscale dealer

Professor Ergo's Thoughts:

A keyboard tray is a key component of an ergonomic workstation. Position your keyboard tray so you can type and mouse while keeping your wrists straight. The ideal height for the keyboard is at elbow height or lower. Typically you should locate the keyboard tray just above your lap height. Your upper arms should hang comfortably at your sides as you work. The keyboard tray should be gently sloped or tilted away from the user to allow the wrists to be straight instead of flexed. When properly adjusted, a keyboard tray allows the back, neck, shoulders, and wrists to relax. The size of the keyboard tray must accommodate the keyboard and any input device like a mouse. Avoid having your keyboard on a tray and your mouse on the desk.

Additionally, be sure to measure under your desk to make sure the track will fit from front to back. It's better to have a slightly shorter track than one that is too long. If you have any questions or need additional information, please don't hesitate to contact us via email or by phone.

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Customer Reviews

Humanscale 900 Standard Keyboard Tray - Design Your Own
5 Stars based on 8 Review(s)
Kevin K
5 Stars

Great keyboard tray
January 8, 2014
I added the side to side adjustable platform for the keyboard. This makes it easier to get the keyboard centered on you monitor and still have the pop up mouse tray clear your desk. I didn't need the keyboard tray pad, as my keyboard came with a pad. If you can't get this adjusted to where you want it, you haven't played with it enough.

5 Stars

great keyboard
December 10, 2012
This is the best keyboard tray I've ever used. Very stable, very easy to use, great price, great value compared to what else is out there.

5 Stars

May 27, 2012
We often work extremely long hours, up to 18 hours a day, sitting at our desks. This keyboard tray helps tremendously with posture and comfort.

5 Stars

Humanscale tray
September 7, 2010
Excellent product.

Fran Hollis-Torres
4 Stars

Humanscale Keyboard Plateform
April 27, 2010
I like the adjustability and movement of the Humanscale Keyboard Platform, but the problem is that it does not adequately fit my split keyboard. I have to constantly adjust my keyboard to work. I do feel more comfortable using it than what I had before which was a standard PC stand keyboard tray. My arms and hands are in a more neutral postion. It would help if it were wider to fit a split keyboard. Thank you

5 Stars

works great!
July 7, 2009
works great!

5 Stars

Humanscale Keyboard Review
March 5, 2009
I did a lot of research to find the right keyboard tray for my office, and this one really stood out because of that adjustable clip mouse platform and 5g mechanism that adjusts quickly and tells you the degree of tilt also. I have arthritis in my fingers and can't mess with adjustments much, so I called to confirm that this would work for me. Brian walked me through my configuration- the most popular 5G90090HG and really took the time to determine exactly what I was looking for in a setup. (If you aren't sure what you need, I highly suggest calling these guys to get their advice.) Anyways, the lead time was a little long but nothing major- two weeks, and they kept me in the loop during this time too. It arrived, was easy to install (15 mins), and is very well built. It's completely changing the way I work and sit, so I'm really pleased with how everything worked out.

4 Stars

I like it
March 5, 2009
This keyboard tray just works. I like the adjustments and the features. I got the high clip mouse with the 5g mechanism.