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Source for Micrometer Heads???


Merlin66
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I'm using micrometer heads to adjust the position of the grating in the spectroscopes I'm building. I need ten of them.

Previously I was able to find some good heads (0-25mm) on eBay.. but now it only seems to be Chinese product - which I bought and tried...absolute rubbish!

Ideally a 0-18mm with spherical nose would be great but beggars can't be chosers...

Has anyone found/ know of a source of cheap micrometer heads???

( If I buy a "normal" exterior micrometer...can the head be easily removed???)

Thank for any help.

Ken

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Yeah...

I saw those Peter, the price looks OK but can the micrometer head be easily removed from the frame?? Anyone tried it??

( With a Chinese one I bought the head was hammered into the frame..believe me!!)

ken

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Some of us used to make our own - all you need is a well fitting nut & bolt with a known thread pitch & some means of adding a scale to read partial rotations of the screw ....

Alternatively - any way of using a macro focusing rail for your application?

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Peter,

That one from Thorlabs certainly looks the part!!

Brian,

Yes, I've done that sort of thing in the past... but this new batch of spectroscopes needs to be a little more up-market than my usual "home-made" prototypes.....

(John, I've ordered one from Proops Bros...where did they dream up that name?... maybe better than the Chinese one...or at least a different factory!)

Ken

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The Proops ones are "cheap and cheerful" and are not "engineer" quality (after all they are only a fiver!) OK for 0.1mm but useless for 0.01mm - I have one, which I use for "rough" on bar stock and castings. This has also shown that the anvils are not hardened. By the way I am NOT implying that Proops sells shoddy stuff, far from it!! They sell mainly to "Hobbyists" rather than engineers, so for folk who make trains & boats & planes their stuff is exellent value for money and sells by the shedload - just go to an exhibition and try to get to their stand!! They also have a good range of stuff - so if you have "another hobby" you could sneak a look at their website: http://www.proopsbrothers.com/acatalog/index.html

Chronos, on the other hand, sell good quality (imported form China?) micrometers. I don't know for sure but I suspect that they are assembled with loctite, so you could try gently warming (150°C in the domestic oven when SWMBO isn't looking!) to seperate the parts.

Hope this helps.

Edited by Bizibilder
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Don't need the hardened nose... I'm going to have to epoxy an 6mm ball on the end to work against a sine bar anyway....It's just to give a fine adjustment of the grating position and some form of read-out...

Ken

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Hi Merlin66 , Here oop in deepest West Yorkshire we have RDG Tools in a little place called Mytholmroyd.RDG Tools Ltd General Workshop Tools

. They list a couple of Micrometer Barrels at under a tenner (one Imperial and tother Metric ). Piccies on their web page . Perhaps these will fit the bill ? Presume these are for your 'Ikea Spectro' Kits ?

These are just 'heads' so may fit the bill,

Len E :D

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len,

I've ordered one of those as well! - looks OK - I've assumed is a 0-25mm travel...

Yes, you're correct these are for the new "Spectra-L200" spectroscopes - to be sold at cost to members of the Y! group Astronomical_spectroscopy.

My contribution to the novice spectroscopist!!!!

Ken

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