[sdiy] Mounting hole size for switch - can't seem to get fromdatasheet

[Jerry Gray-Eskue]

This data sheet is missing the recommended mounting hole pattern.

If you look closely at the bottom left drawing you will see one of the
washers has an anti rotation tab to keep the switch lined up in the correct
direction. These type washers usually have a tab on the inner side that fits
into a slot on the threaded sleeve of the switch. To mount the switch
correctly you need two holes, one for the threaded shaft on one for the
washer keeper tab. The alternate correct mounting is one keyed hole for the
threaded shaft. That being said I have seen a lot of gear that just mounts
the switch through a round hole.

Since the mounting hole drawing is missing, the best bet to get the mounting
right, using one hole or two, is to get the switch and make your own
measurements.

- Jerry


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of Aaron Lanterman
Sent: Tuesday, June 30, 2009 12:04 PM
To: SDIY DIY
Subject: [sdiy] Mounting hole size for switch - can't seem to get
fromdatasheet


My mechanical datasheet fu is not strong. I have a doctorate in EE,
which automatically means I have to suck at practical stuff. ;)

I'm looking at these MS550x series switches from Mouser (well,
actually I'm looking at the cheaper Small Bear versions, but anyway...)

The datasheet is here:

http://www.mouser.com/catalog/specsheets/MS-200272.pdf

The mouser page is here:

http://www.mouser.com/catalog/catalogUSD/638/1632.pdf

I can't alas seem to find the magic number that tells me what size
hole to drill to fit such switches. Can anyone see the magic number or
tell me how to get it from the available measurements?

If I had a switch on hand I'd measure it - I'm just working on a file
in FPD, and would like to know what measurement to put in.

Thanks!

- Aaron
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