June 6, 2018 Skippy No comments

6″ Rack System

{{ :projects:rack:2017-06-26-13-50-52.jpg?300|}}On [[https://www.thingiverse.com/thing:1936196 |Thingiverse]] / [[https://github.com/KronBjorn/SixInchRack |Github]] there are the details for making a 6″ rack system, It is designed for being built from 2020 extruded aluminium profile((but a profile can also be printed)). the measurements are as roughly as follows:

Dimension Measurement
inches mm
Front panel width 6.1 155
Holes centre to centre 5.2 135
Maximum usable aperture 4.4 115
1 U Height 0.55 14
2 U 1.1 28
3 U 1.65 42
4 U 2.2 56

{{ :projects:rack:2017-06-26-13-51-42.jpg?600 |}}

The standard 19″ rack mounting system has the following measurements:

^ Dimension ^ Measurement ||
| ::: ^ inches ^ mm ^
| Front panel width | 19 | 482.6 |
| Holes centre to centre | 18.31 ± 0.06 | 465 ± 1.5 |
| Maximum usable aperture | 17.7 | 450 |
| 1 U | 1.75 | 44.8 |
| 2 U | 3.5 | 88.9 |
| 3 U | 5.25 | 133.4 |
| 4 U | 7 | 177.8 |

I like the look of the 6″ system, however to fit my needs better; I am going to adjust it slightly:

^ Dimension ^ Measurement (mm) ^ Fusion 360 link ^
| Front panel width | 170 | |
| Holes centre to centre | 750 | |
| Maximum usable aperture | 130 | |
| 1 U | 15 | [[http://a360.co/2x8esvf|1U case]] |
| 2 U | 30 | [[http://a360.co/2xRurgZ|2U case]] |
| 3 U | 45 | 3U case |
| 4 U | 60 | 4U case |

This means that each Front Panel is just slightly shorter than 4 19″ rack units at 177.8mm, leaving ~3mm each at top and bottom for sheets of material. and the Maximum usable aperture is 450 mm which is 30 U in my system, so with careful mounting and design; I should be able to get 30 U of equipment in 4U of 19″ Rack mount space.

The parts on [[https://www.thingiverse.com/thing:1936196 |Thingiverse]] are designed to be printed; however I am more interested in making my system to be laser cut, using the same box maker for Fusion 360 as I am using on my [[weblog:2017:miniboygeekinterface:|]].

For mounting into the 2020 I will use the [[https://www.thingiverse.com/download:3034410|same method]], and use [[http://www.ebay.co.uk/itm/M3x6mm-Flat-Knurled-Head-Fully-Threaded-Thumb-Screws-Bolts-Fastener-10pcs/361905597998?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649|M3 x 6 Thumb Screws]].