View Full Version : Thread measuring wires - an idea for you

01-11-2013, 08:24 PM
We'd use thread measuring wires at every outing if they weren't so damn awkward. Short of growing a third arm, the solution has been grease or plasticine moving the operation from impossible to hardly tolerable.

I was thinking about this and had an idea - old piece of bicycle inner, 1/4" punched hole and two tiny slits. voila, trouble no more! two wires held with the bottom fixed anvil, one on mic and one on the third wire



J. R. Williams
01-11-2013, 08:36 PM
Check out this site. You saved $20

01-11-2013, 08:45 PM
Good idea! For some time now I've been using orthodontic rubber bands to accomplish a similar thing.

01-11-2013, 09:05 PM
Not quite there yet - make the ends a little bit longer and put the third wire through the ends above the first two wires spaced just enough to allow you to slip it over the threads. Thin rubber would be flexible enough to allow lining up as the mile is closed.

Jim Hubbell
01-11-2013, 10:13 PM
I have used a piece of foam or an old eraser to jam the wires into. Not the best but it brings it back to a two handed job.

Paul Alciatore
01-12-2013, 02:25 AM
?What? You guys don't have three hands?

I grew an extra one 25 years ago. "Handiest" thing ever!


Really good idea. I would use latex rubber sheet instead of old inner tube. It's much more flexible.

John Stevenson
01-12-2013, 04:05 AM

Doesn't your sets come with them ?

01-12-2013, 04:19 AM
$20 each on ebay. Worth every last penny. No tables or anything to worry about, Just zero it (or use the included x" thread standard for larger screw thread micrometers) and clamp the bottom insert flush to the top insert.

Never did find any cheap screw thread micrometers with the direct readout dial like this one: http://www.penntoolco.com/images/catalog/2362.gif
But do have a nice set of them to 4" for $20~ each in regular micrometer. (Although those $20 ones only direct readout to 0.001", vineer scale is still used for 0.0001" accuracy)

For the rare time I use the screw thread micrometers, I can live with reading the scale on the barrel.

01-12-2013, 07:33 AM
thanks guys

I've a fairly good collection of mitutoyo thread mics and they're great, but that has nothing to do with an idea on making thread wires easier to use. Thread wires are still necessary for different profiles and if you're going to have one tool in the box for threading, they're it. I've recently used them whitworth, acme, multistart etc

John, no, but at cost of probaly $0.01 it should behove the manufactuers to include them.....had to build my own

01-12-2013, 05:48 PM
It is actually easier to use just two or just one wire - it works OK - I will post the details when I get around to it - when-ever - just simple Shop Math and Trigonometry 101.

01-12-2013, 06:05 PM
I will post the details when I get around to it - when-ever - just simple Shop Math and Trigonometry 101.

hopefully in a thread you start on the subject

01-12-2013, 06:21 PM
Wait and see - but don't hold your breath.

01-13-2013, 07:51 PM
Good Idea!!