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geekhack Projects => Making Stuff Together! => Topic started by: Tym on Sat, 27 April 2013, 08:06:15

Title: What are the dimensions of an MX cherry Stem
Post by: Tym on Sat, 27 April 2013, 08:06:15
So yeah does anyone know the sizes of the + stem of a switch? Doesn't matter how long I have highlighted what i need in red, cheers guys!


[attachimg=1]
Title: Re: What are the dimensions of an MX cherry Stem
Post by: regack on Sat, 27 April 2013, 08:43:48
I don't have a drawing, but here are some numbers:

The thickness of the 'thin' part of the cross-stem is  ~1.1mm
The thickness of the 'thick' part of the cross-stem is ~1.3mm

The thin-to-thin dimension of the cross is ~3.93mm
The thick-to-thick dimension of the cross is ~3.95mm

Maybe it's supposed to be square?  .02mm could be within their tolerance.



Title: Re: What are the dimensions of an MX cherry Stem
Post by: esoomenona on Sat, 27 April 2013, 08:48:03
x=1.425mm
y=1.315mm

Based on those numbers above. Right? Morning math probably isn't my thing...
Title: Re: What are the dimensions of an MX cherry Stem
Post by: cyberwave on Sat, 27 April 2013, 09:14:24
whipped out my caliper for a quick measure.

x= (4 - 2(1.1)) / 2 =  0.9mm
y= (3.96 - 2(1.27)) / 2 = 0.71mm
Title: Re: What are the dimensions of an MX cherry Stem
Post by: TotalChaos on Sat, 27 April 2013, 21:14:14
At first, your msg has 100% totally confused me as to what the dimensions of the + are.  Then I scratched my head for a min and...

You are you saying the + is 4mm wide and 3.96mm tall?

p.s. Thanx for owning a caliper and posting the measurements.
Title: Re: What are the dimensions of an MX cherry Stem
Post by: cyberwave on Sat, 27 April 2013, 23:20:48
Quote from: TotalChaos on Sat, 27 April 2013, 21:14:14
At first, your msg has 100% totally confused me as to what the dimensions of the + are.  Then I scratched my head for a min and...

You are you saying the + is 4mm wide and 3.96mm tall?

p.s. Thanx for owning a caliper and posting the measurements.

4mm wide and 3.96mm tall

the horizontal part is thicker than the vertical part
Title: Re: What are the dimensions of an MX cherry Stem
Post by: thegagne on Sun, 28 April 2013, 13:15:45
On a related note, I have a random "CONN DFLT" red key cap that has a non-standard stem and doesn't fit my MX browns. Any idea why?
Title: Re: What are the dimensions of an MX cherry Stem
Post by: TotalChaos on Sun, 28 April 2013, 13:22:02
Quote from: thegagne on Sun, 28 April 2013, 13:15:45
On a related note, I have a random "CONN DFLT" red key cap that has a non-standard stem and doesn't fit my MX browns. Any idea why?
Turn it sideways?
Title: Re: What are the dimensions of an MX cherry Stem
Post by: thegagne on Sun, 28 April 2013, 17:04:20
[attach=1]

doesn't fit sideways either.
Title: Re: What are the dimensions of an MX cherry Stem
Post by: Tym on Sun, 28 April 2013, 17:21:02
Cheers all!
Title: Re: What are the dimensions of an MX cherry Stem
Post by: TotalChaos on Sun, 28 April 2013, 17:39:38
Quote from: thegagne on Sun, 28 April 2013, 17:04:20
(Attachment Link)

doesn't fit sideways either.
Did u ebay this mutant keycap from a Ukrainian that lived near Chernobyl?  :p