Low Cost Pediatric Wheelchair DIY Pediatric Wheelchair



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Frequently Asked
Questions

Open Wheelchair Part List

The parts list is broken into 3 parts:

  • PVC Frame,
  • Gear Train, and
  • Electronics.
The frame is adjustable to the size of the child and so you will need to make six measurents of your child with a rule or tape measure, and enter the results below to get the correct size of the PVC segments, so that your wheelchair can be perfectly tailored to the size of your child.

When you press the "Size Parts" button, below you will be give a total list of all the PVC segments that will need to be cut for the wheelchair. This will also calculate the total length of PVC that you will need to purchase. You should buy extra PVC, because there will be remnants from each stock piece that is cut.





Child's Measurements

M1 Seat Width. Measure distance between hips (inches)
M2 Seat Depth. Measure inside of knee to back of hips (inches)
M3 Foreleg Length.Measure from inside of knee to bottom of foot (inches)
M4 Back Length.Measure from bottom of seat to top of shoulders (inches)
M5 Arm rest height. Measure from bottom of seat to elbow (inches)
M6 Forearm length. Measure from elbo to tip of fingers. (inches)



If you pruchase your PVC piping and connectors from www.formufit.com, you can get get them in a variety of colors. When ordering use the color suffix.


PVC Parts List

1/2" PVC Pipe Segments (From www.formufit.com Part Number: P012FGP-COLOR-5)


Part Number Description Pipe Length (inches) Quantity
PVC-PIPE1 Based on seat depth. PIPE1= M2 2
PVC-PIPE2 Based on seat width. PIPE2= M1+1 8
PVC-PIPE3 Fixed at 3.5"
4
PVC-PIPE4 Half of seat depth. PIPE4= (M2-1") / 2 6
PVC-PIPE5 Based on back length. PIPE5= M4 - 5.5"
2
PVC-PIPE7 based on back length. PIPE7= PIPE5+8" 1
PVC-PIPE8 Elbow height. Minimum is (1.5"). PIPE5= M5 2
PVC-PIPE9 Fixed at the minimum of (1.5"). PIPE5=1.5" 5
PVC-PIPE10 Based on foreleg height. PIPE5= PIPE11-2.5" 2
PVC-PIPE11 Based on foreleg height. The minimum is 7". PIPE3= M3-3" 6
PVC-PIPE12 Based on elbow height. PIPE12= PIPE11-2.5" 2
PVC-PIPE13 Based on forearm length. PIPE13= M6 2
TOTAL PVC
(inches) (feet) ($)


1/2" PVC Connectors
(From www.formufit.com)

Note that pricing is for plane white PVC. Colored PVC costs about 20% more.

Part Description Part Number Quantity Cost Total
PVC-CON-A 4-Way Tee Connect 1/2" F0124WT-COLOR 10 $1.20 $10.20
PVC-CON-B 5-Way Cross Connect 1/2" F0125WC-COLOR 2 $1.70 $3.40
PVC-CON-C 3-Way Elbow Connect1/2" F0123WE-COLOR 6 $1.10 $6.60
PVC-CON-D 90 Degree Connect 1/2" F01290E-COLOR 6 $0.90 $5.40
PVC-CON-E Tee Connect1/2" FO12TEE-COLOR 2 $1.10 $2.20
PVC-CON-F Slip Sling Tee Connect1/2" F012STE-COLOR 7 $1.60 $11.20
TOTAL $40.8



PVC-CON-A

PVC-CON-B

PVC-CON-C

PVC-CON-D

PVC-CON-E

PVC-CON-F






All prices are in $USD. Note that becuse the design is evloving part numbers, prices, or suppliers may change without notice.

Main Parts List

Part Description Part Number Supplier Cost QTY Freight Total

Frame

PVC pipe and fittings Furniture grade PVC See PVC Parts List www.formufit.com/ $75.5 1 $15 $64.00
Seatbelt Auto-Style Positioning Belt 45928 www.1800wheelchair.com
Seatbelts can also be found on www.amazon.com.
$12.50 1 $4.00 $16.50
Fastener Pack Pack of screws, and clamps. FASTENER-PACK www.openwheelchair.org $14.95 1 $0.00, if purchased with controller, below. $14.95

Cushion

Note that you can purchase a cushion or make one yourself.
Seat Cushion(1)

Note that if you use this option you will need to use these dimensions in the calculator above for the hip width M1, and the femur length M2.
Comfort Company Curve Pediatric Cushion

Multiple sizes are available. 10"x10", or 12"x12" is a good size if you are unsure.

http://www.medicaleshop.com/ $61.68 1 $18.28 $79.96

Drivetrain

Motor 12V 45mm Diameter Gear Head Motor with 10mm Diameter Shaft
PG45M775126000-32.5K www.openwheelchair.com These can also sometimes be found on www.aliexpress.com but are more expensive, in small quantities. $30 2 $0.00 $59.95
Motor Bracket Mounts motor to wheelchair MOTOR-BRACKET www.openwheelchair.org $14.95 2 $0.00, if purchased with controller, below.
$14.95
Set Screw Hub Actobotics 10mm Bore 0.77'' RB-Sct-629 www.robotshop.com
$4.99 2 $0.00 $9.98
Hub Adapter Actobotics 1.50" x 0.770" RB-Sct-376 www.robotshop.com
$3.99 2 $0.00 $7.98
Wheel Actobotics 6" Heavy Duty RB-Sct-437 www.robotshop.com
$9.99 2 $9.00 $28.98
Casters 5" x 1-1/4" Swivel Caster with 7/16" diameter grip ring connector. PRES5024ZN-TPR
Hardware Store, or

A1-Casters
Phone or email Order to sales@a1casters.com
$7.50 2 $10 $25.00

Electronics

Motor Controller Board and Joystick Joystick Motor Controller Board with Joystick JOY_MOTOR_CTRL www.openwheelchair.org
$139.95 1 $9.95 USA,

$47.00 International
$149.90 USA,

$186.95 International
Battery(2) 5 Ah SLA battery B000YA7SQU www.amazon.com $14.99 1 $0.00 $14.99
Battery Charger Power Stream: PST-3P10-12VA with alligator clips, or
Amazon: Battery Tender Junior 12V Battery Charger
PST-3P10-12VA, or 210123 www.powerstream.com www.amazon.com $26.92 1 $0 $26.92

NOTES:
(1) The seat cushion can be sewn and assembled, or optionally a more expensive off the shelf seat cushion can be purchased.
(2) Any size battery may be used between 5 - 12 Ah or that fits below the seat.





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© Copyright 2015 Open Wheelchair Foundation. All rights Reserved.

The Open Wheelchair hardware design is licensed under CERN Open Hardware Licence v1.2 and the Software is licensed under the GNU General Public License Version 3. By viewing or using the design posted on this website you are agreeing to these licenses. To view the license see our license page.