From: mrk@gvgspd.gvg.tek.com (Michael R. Kesti)
Newsgroups: rec.music.synth
Subject: Re: homemade keyboard stand
Date: 20 Jan 93 23:11:09 GMT
Organization: Grass Valley Group, Grass Valley, CA
NNTP-Posting-Host: gvgspd.gvg.tek.com

In article <1993Jan14.071505.28324@news.acns.nwu.edu>
                                jonlea@casbah.acns.nwu.edu (Jon Lea) writes:

>	2) What are the dimensions of the threaded holes on rack-mount
>	   flight cases, etc.  I am looking for height spacing as well
>	   as width spacing.

The dimensions of a standard two space 19" rack are:


         |<-------------------- 19.062 +/-0.032 -------------------->|
     _____________________________________________________________________
     |   |                                                           |   |
     |   | |<------------------ 18.312 +/-0.062 ------------------>| |   |
     |   |___________________________________________________________|   |
0.312|   |   |                                                   |   |   |
     |   | o |                                                   | o |   |
     |   |   |                                                   |   |   |
0.625|   |   |                                                   |   |   |
     |   |   |                                                   |   |   |
     |   | o |                                                   | o |   |
     |   |   |                                                   |   |   |
0.625|   |   |                                                   |   |   |
     |   |   |                                                   |   |   |
     |   | o |                                                   | o |   |
0.500|   |   |<--------------- 17.750 +0.062, -0 --------------->|   |   |
     |   | o |                                                   | o |   |
     |   |   |                                                   |   |   |
0.625|   |   |                                                   |   |   |
     |   |   |                                                   |   |   |
     |   | o |                                                   | o |   |
     |   |   |                                                   |   |   |
0.625|   |   |                                                   |   |   |
     |   |   |                                                   |   |   |
     |   | o |                                                   | o |   |
0.312|   |   |                                                   |   |   |
     |   |___|___________________________________________________|___|   |
     |   |                                                           |   |
     |   |                                                           |   |
     |___|___________________________________________________________|___|


Notes:
	1) All dimensions in inches.

	2) Extrapolate for additional height racks.

	3) The holes are to be tapped for 10-32 screws or drilled to
	   accomodate the clips that provide a "stand-alone" nut.  The
	   latter are advantageous because they allow one to simply
	   replace the clip/nut if one strips out a hole, rather than
	   having to replace the entire rail.

	4) The holes in the middle of each space are actually optional,
	   but should be included for "universal" mounting.  Some gear,
	   such as the Alesis 1622 mixer, require them if all mounting
	   holes are to have screws installed.

	5) Panel thicknesses, and therefore the desired setback of the
	   rails from the front of their supporting members, are quite
	   variable, and may range from 0.125 to 0.312.

-- 
============================================================================
Michael Kesti  Grass Valley Group, Inc. | "And like, one and one don't make
    mrk@gvgspd.GVG.TEK.COM              |  two, one and one make one."
    !tektronix!gvgpsa!gvgspd!mrk        |         - The Who, Bargain
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