FIXED MISTAKE!!
- As of 11/19/2020, i fixed the dimension of the vertical side as this one was 3mm shorter than the horizontal which caused a difference of 7º on the diagonal angle. Sorry about that!
Design of a two sided speed square 160mm x 160mm and for the ones that STILL uses imperial, i designed a 6" x 6" version as well.
160mm x 160mm
- The upright side goes from 0cm to 15cm, with steps of 2mm.
- The upright slot has two features, one makes it easy to scribe lines for steps of 5mm and 10mm, the other is for steps of 2.5mm and 7.5mm.
- The bottom slot goes from 3cm to 8.5cm, with steps of 5mm.
- The diagonal side are the angle in degrees from 5º to 85º, with steps of 5º.
- The diagonal slot are the common rise over a 12 inches run, from 1" to 30".
6" x 6"
- The upright side goes from 0" to 6", with steps of 1/8".
- The upright slot has two features, one makes it easy to scribe lines for steps of 1/2" and 1", the other is for steps of 1/4" and 3/4".
- The bottom slot goes from 1"1/4 to 3"1/4, with steps of 1/4".
- The diagonal side are the angle in degrees from 5º to 85º, with steps of 5º.
- The diagonal slot are the common rise over a 12 inches run, from 1" to 30".
Here is a quick video that explains how a speed square works !
