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PostPosted: Wed Jan 16, 2019 7:02 am 
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I've been using this gizmo to measure reed thickness and found it to be very useful . the plunger is spring loaded and pulled back with the switch on top, I've filed the plunger to a point to give a accurate reading .
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On ebay for peanuts
https://www.ebay.ie/itm/0-12mm-Portable ... rk:10:pf:0

RORY

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PostPosted: Wed Jan 16, 2019 8:07 am 
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I've used something similar, a ball mic (spherical anvil micrometer). It differs by having a spherical section on the immovable portion, but I have seen micrometers with tapered posts, usually tapered to a radiused tip rather than a point.

dave boling

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