> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/ion-build/home/system-standards.md).

# System Standards

REV ION was created to minimize the required tools, hardware, and cost to build a robot. To accomplish this the REV ION System has standardized the following throughout its products:

### #10 Clearance Holes

* All hardware is #10-32 sized
* Any tapped holes are #10-32
* Can use 3/16in rivets

### 1/2 in Hole Pitch

* Linear pattern or grid on structural components 
* Radial pattern on circular components
* Some circular components also have the linear pattern for ease of attaching to structure 
* Combined with MAX Spline to form the MAX Pattern

### 1/2 in Rounded Hex Shaft

* 13.75mm diameter rounded corners for ease of assembly in bearings
* Fits standard 1.125in OD Bearings

### Fractional Axial Width

* Components together along a shaft always have a total width on a fractional interval