Author Topic: Microscope mounting posts  (Read 707 times)

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Offline daveismissing

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Microscope mounting posts
« on: February 14, 2023, 06:00:41 pm »
Are the posts for the typical microscope stand all(mostly)  the same diameter?, Does anyone know what that diameter might be. Speaking of the usual Ali/Bang good/whatever products.
 

Online ygi

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Re: Microscope mounting posts
« Reply #1 on: February 14, 2023, 08:19:35 pm »
AFAIK, diameter is either 25 or 32mm. I'd say 25mm is more common when it comes to Chinese imports. Though, the 25mm head uses a plastic reducer to turn the 32mm hole into a 25mm that you could pop out. Look at the picture, you'll get what I mean:

 

Offline daveismissing

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Re: Microscope mounting posts
« Reply #2 on: February 15, 2023, 06:27:58 pm »
Thank you so much!
 

Offline daveismissing

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Re: Microscope mounting posts
« Reply #3 on: March 08, 2023, 08:53:16 pm »
And now for the real surprise - when this one (Wally Sky) arrived the hole was 14mm  :)
 

Offline jfiresto

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Re: Microscope mounting posts
« Reply #4 on: March 08, 2023, 09:50:32 pm »
So what size shaft might it need?

I am having some fun satisfying a microscope that expects a 24½mm shaft.
-John
 

Online ygi

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Re: Microscope mounting posts
« Reply #5 on: March 09, 2023, 02:48:16 pm »
And now for the real surprise - when this one (Wally Sky) arrived the hole was 14mm  :)

Welp, that unusual when it comes to binocular microscopes. Even my lightweight USB microscope stand uses a thicker shaft.

So what size shaft might it need?

I am having some fun satisfying a microscope that expects a 24½mm shaft.

That's what the diameter of my "25mm" shaft really is when measured with a caliper.
 

Offline jfiresto

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Re: Microscope mounting posts
« Reply #6 on: March 09, 2023, 05:20:07 pm »
...I am having some fun satisfying a microscope that expects a 24½mm shaft.

That's what the diameter of my "25mm" shaft really is when measured with a caliper.

I would think that would feel a little loose. Mine measured 25±0·05mm.
-John
 

Online ygi

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Re: Microscope mounting posts
« Reply #7 on: March 09, 2023, 09:00:44 pm »
Well, there's a brass ring insert inside the head mount hole that gets squeezed against the shaft as a part of the locking mechanism. That ring fits snugly into a groove in the shaft allowing the head to rotate without sliding down when the locking screw's loosened.
That's this black part to the right:

 


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