Internal Structure of the Schmidt SKM-88 Click Mechanism ?

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magpens

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Feb 2, 2011
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I can see potential for incorporating the Schmidt SKM-88 Click Mechanism into the ballpoint pens that I make.

However, the slightly tapered shape of the outer sleeve is problematic.

Using a metal working lathe, I would like to remove the taper and reduce the diameter by a few thou.
I have tried this on 3 units. . Only 1 of the units remains fully functional after the machining. . The other 2 show no signs of actual damage, but are not reliable.

I am thinking, if I understood how the internal mechanism is constructed, that I might be able to do the machining with better success.

I'd greatly appreciate receiving any advice, please.

By inspecting an intact original unit, I see that there is a very tiny circlip on the small diameter shaft of the unit.
I suppose, by removal of that circlip, that the unit might come apart and reveal its internal construction.
I haven't tried that yet and am loathe to do so because the circlip is extremely tiny and I don't have any tools to remove it.

Thanks for any knowledge, help, or info that you can share.
 
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darrin1200

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Lyn, Ontario, Canada
Internally, there are extremely fine channels and ball bearings.
Some where on here is a discussion about this. It included some photos and disassembly tips.

 
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Herman

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Oct 3, 2020
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I would sugest SKM 192 Push Button. Ready to use, you just need a M4 x 0.35 tap to fix this part.
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DME72

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May 9, 2012
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st louis
milans pens sells these mechs and lots of other ones too. he has done pens with that mech turned down and built up with other materials. if i remember he still has a few for sale on his website. i want to take that mech SKM88 and turn down and solder aluminum to it and turn a new outside of the mech and button out of aluminum and polish it. do a search for milans pens and parts. look and the pens he has for sale.

doug
 

magpens

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@DME72

Thanks for the info, Doug. . I should check out the Milan website.

BTW, I have now learned to turn down the outer sheath of the SKM-88 with really good success .... 100% so far for my application.
I am just taking off the outer tapering ... metal removed is about 8 thou thick at the bottom end and 0 at the top to get it straight-sided.
 
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