Using the Printable VEX Metal Parts Ruler (VEX V5 / VEX Cortex)

Whether organizing parts, following a set of build instructions, or building a custom design, identifying a part correctly can be crucial to your success.

The VEX Metal Parts Ruler is a handy tool to help identify parts.

Note: when printing the .pdf be sure to set to 100% scale.

This article will explain:

Using the Ruler to Identify Parts

The VEX Metal Parts Ruler can be used to identify parts while organizing parts or following a set of build instructions. The scale on the ruler is 1:1, so parts can simply be placed on top of the ruler.


Measuring Structural Metal. Example shown is a 5x15 Plate. 

  • 5 indicates a width of 5 pitch units.
  • 15 indicates a length of 15 pitch units.


Measuring Screws. Example shown is a #8-32 1.0 inch Star Screw.


Measuring Spacers. Example shown is a 0.375 inch Spacer.


Measuring Gears. Example shown is a 60 Tooth Gear.


Measuring Sprockets. Example shown is a 18 Tooth Sprocket.


Measuring Standoffs. Example shown is a 3 inch Standoff.


Measure Shafts. Example shown is a 3 inch Shaft.

Using the Ruler While Assembling a Robot

The VEX Metal Parts ruler can also be used as a measuring tool to measure parts and distances. This can be very helpful when designing and assembling a custom robot which does not have specific instructions regarding the selection of parts.

Tip and trick: The .pdf of the VEX Metal Parts Ruler can be printed out on a clear plastic transparency. This will allow the ruler to be overlaid on the robot and measurements can be made by measuring through the ruler.

Here are some examples of using the ruler while assembling a custom robot.


Measuring the distance between C-Channels on a robot chassis. This example shows the C-Channels on the robot chassis measuring 16 pitch or 8 inches.


Using inches/millimeters to measure the diameter of wheels. Example shown is a 3.25 inch Traction Wheel (3.25 inches/83 millimeters).


Measuring the number of chain links in a chain/sprocket system.