Hex hole sizing plate

by ToddF, published

Hex hole sizing plate by ToddF Apr 1, 2013

Thing Info

1448Views 248Downloads Found in 3D Printing Tests
Report Thing


1/2" hex shaft is very common in FRC robot drive trains and transmissions. Team 2363 uses our Replicator to make parts for our West Coast Style drive train. If you print parts with .500" hexes, the printed parts do not fit onto 1/2" hex shafting. I created this plate to allow the proper sizing of the hex holes in a solid model.


Print the plate with the fill ratio you want to use in your finished parts.

Label the holes as shown in the photo. Smallest hole is .500", and the holes go to .535" in increments of .005".

Test fit your hex shaft in the holes starting with the largest size hole and working down.

Select the nominal hole size to give the fit you want between the shaft and the part, and use that size in your part.

Be aware that the top and bottom layers may be smaller than the interior layers of the part. Filing or trimming the top and bottom layers back with a file or Xacto knife may give a slightly different fit of the shft to the hole.

If you modify your print speeds, accelerations, layer thicknesses, or fill ratios, any of these may affect the fit of the hex holes to the shaft. Reprint another plate with the new parameters to use for test fitting.

You can also use the outside dimensions of the plate to check how well your machine is holding tolerances. The plate nominal dimensions are 3.4375 x 1.75 x .250. The plate shown in the picture measured 3.423 x 1.752 x .235/.242

More from 3D Printing Tests

view more

Thing Info

1448Views 248Downloads Found in 3D Printing Tests
Report Thing

Liked By

View All

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag. Print Thing Tag

All Apps

This extension connects Thingiverse with Makeprintable, a cloud-based mesh repair service that analyzes, validates and repairs most common mesh errors that can occur when preparing a 3D design file...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App