Introduction: Adjustable Keyboard Platform, Desk Extension

My old keyboard tray hung too low and slid back and forth too easily, so I removed it and placed my keyboard and mouse on the desktop in front of my docking station.  This left little room for papers to be placed in front of me.

So, I converted my hanging keyboard tray into an adjustable keyboard platform / desk extension.

Features: 
Tilts forward and backward.
Slides out quite far
Buts up, flush with the desktop
Holds position well, is quite sturdy
Cost less than $20 in materials.

Materials:
2 - Orbit Watermaster  1/2 In. X 36 In. Pvc Riser
1 - Orbit Watermaster  1/2 In. X 18 In. Pvc Riser
2 - NIBCO  1/2 In. PVC Schedule 40 Tee (threaded 3 ways)

6 - 1/2" U-Clamps
10 - small screws
10 - small washers

1 - 2" x 10" plywood riser

1 - 12" x 26" plank 
(Keyboard tray that came with desk, a generic shelf would substitute)


Tools:
Screw driver or Cordless Drill
Drill bit for pilot holes
Square and Pencil
Hack Saw


Steps, Tasks: 

Attach Pivot Support to Underside of keyboard platform.

1) Attach Tee's to ends of 18" PVC Pipe.

2) On a workbench, center 18" PVC pipe on underside of plank. Mark it's corner position

3) Center plywood riser under PVC pipe. Mark corners with pencil

4) Place U clamps over PVC pipe onto plywood. Mark holes with pencil

5) Drill pilot holes through plywood halfway into plank.

6) Line up U clamps, pipe and riser based on your pencil marks and screw together


Attach Rails to Desk

1) Sit in front of your desk holding the plank and decide on desired position.

2) Place plank on top of desk, with Pivot Support hanging down. Mark center of Tee on desk edge.

   Measure and check that desk mark width equal pivot support, from center of Tee to center of Tee.  

3) Lie under desk and use square to draw a center line from desk front to desk back. 

4) Hold rail and U clamp along center line and mark U clamp holes 1" and 12" from front of desk edge.

5) Drill pilot holes, and attach U clamps to under side of desk. 

6) Repeat steps 4 - 5 for other rail

6) Slide PVC rails into U clamps, and test sliding ability. Remove rails for further testing


Setup Rails and Platform

1) Screw rails into Pivot support on under side of plank.

2) Slide the rails into the U clamps on the desk. 

3) Slide platform until rails come out other side, or but up against the wall.

4) Measure the excess rail length. 

5) Remove plank from desk and remove rails from pivot support.

6) Cut excess rail length off with hacksaw. Reserve these pieces


Reassemble and Enjoy

1) Reattach rails to pivot support, and slide platform into your desk.

2) Optional. Screw pieces cut from rails into front of Pivot Support Tees. Trim to your preference. They will limit backwards tilt, and provide handles to move the platform with.

3) Optional Lock. Wedge an old USB key between the option 2 tube pieces and the platform to lock it's position.




Comments

author
chriswhalencpa (author)2015-02-12

Excellent. Thanks for sharing your design. Inexpensive and functional. Perfect

author
moneydoc (author)2013-01-24

From the design I assume the platform does not slide back under the desk surface or am I missing something? If it slides back do you store the keyboard and mouse on it or back on the desk surface?

author
hartman5000 (author)moneydoc2013-01-25

No, it doesn't slide under. I use the keyboard over 90% of the time, so it just sits on the platform. If I really need to write something I can use the desk beside the platform or push the keyboard forward onto the desk.

I have become fond of using 2 foam boards and a cutting mat, clipped together as a mobile all purpose laptop desk / work space platform, it's bigger, cheaper, and lighter than the ones you can get from Staples. You can see it in my Standing Desk Instructable.

author
moonbard (author)2012-02-08

What are the dimensions for the desk this is attached to? I have a desk that seems too small to fit a foot of pipe under. Do you think this can be scaled?

author
hartman5000 (author)moonbard2012-02-09

I think it could work on a smaller desk. I think the minimum would be 6 inches of pipe under the desk. That's my best guess based on the flexibility of the pipe I used.

This one is built as so:

Desk : 27 inches Wide x 56 inches Long
Length of Rails Under Desk : 18 inches
Location of Inner U clamps : 12 inches from front Desk Edge

Extra Pipe dimension note:
it is 3/4 of an inche wide, with an 1/8 inche wall thickness

author
groverw (author)2011-08-31

Great idea, simple low-cost solution that can be customized and scaled to a variety of similar needs. How is the pivoting surface working out? Do the clamps provide some friction to prevent unwanted tilting?

author
hartman5000 (author)groverw2011-09-01

The platform can tilt back too far and too easily with the pictured setup. The clamps don't have enough friction to hold the platform against a lot of force applied to the outside edge.

I inserted the cut ends into the other side of the T section as I describe in the "Optional" step at the end. I have added a picture to show that. They could be cut to adjust how much the platform can tilt back. I also considered making the plywood base double thick to give more forward tilt range.

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