Conversion chart

[Stwood_]

Yeah, I have a drill bit / tap chart hanging behind my drill press.

Yes. Very handy to have one there also.

And, I'd bet most of us in here do other things in our shops besides just woodworking.

[Wild Turkey]

Here's my version for seeing what size is close to what. Useful when trying to figure out if something is SAE or metric and if so what size.

MM---mm dec---SAE dec ----SAE
---- ----0.03----1/32
1----0.04---- ----
---- ----0.06----1/16
2----0.08----0.09----3/32
---- ----0.13----1/8
3----0.12----0.16----5/32
---- ----0.19----3/16
4----0.16---- ----
5----0.20---- ----
---- ----0.22----7/32
6----0.24---- ----
---- ----0.25----1/4
7----0.28----0.28----9/32
8----0.31----0.31----5/16
---- ----0.34----11/32
9----0.35---- ----
---- ----0.38----3/8
10----0.39---- ----
---- ----0.41----13/32
11----0.43---- ----
---- ----0.44----7/16
12----0.47----0.47----18/32
---- ----0.50----1/2
13----0.51---- ----
---- ----0.53----17/32
14----0.55---- ----
---- ----0.56----9/16
15----0.59----0.59----19/32
16----0.63----0.63----5/8
---- ----0.66----21/32
17----0.67---- ----
---- ----0.69----11/16
18----0.71---- ----
---- ----0.72----23/32
19----0.75----0.75----3/4
---- ----0.78----25/32
20----0.79---- ----
---- ----0.81----13/16
21----0.83---- ----
---- ----0.84----27/32
22----0.87---- ----
---- ----0.88----7/8
23----0.91----0.91----29/32
24----0.94----0.94----15/16
---- ----0.97----31/32
25----0.98---- ----
---- ----1.00----1
26----1.02---- ----
---- ----1.03----1 1/32
27----1.06----1.06----1 1/16
---- ----1.09----1 3/32
28----1.10---- ----
---- ----1.13----1 1/8
29----1.14---- ----
---- ----1.16----1 5/32
30----1.18---- ----
---- ----1.19----1 3/16
31----1.22----1.22----1 7/32
---- ----1.25----1 1/4
32----1.26---- ----
---- ----1.28----1 9/32
33----1.30---- ----
---- ----1.31----1 5/16
34----1.34----1.34----1 11/32
35----1.38----1.38----1 3/8
---- ----1.41----1 13/32
36----1.42---- ----
---- ----1.44----1 7/16
37----1.46---- ----
---- ----1.47----1 15/32
38----1.50----1.50----1 1/2
---- ----1.53----1 17/32
39----1.54---- ----
---- ----1.56----1 9/16
---- ----1.59----1 19/32
40----1.57---- ----
41----1.61---- ----
---- ----1.63----1 5/8
42----1.65---- ----
---- ----1.66----1 21/32
43----1.69----1.69----1 11/16
---- ----1.72----1 23/32
44----1.73---- ----
---- ----1.75----1 3/4
45----1.77---- ----
---- ----1.78----1 25/32
46----1.81----1.81----1 13/16
---- ----1.84----1 27/32
47----1.85---- ----
---- ----1.88----1 7/8
48----1.89---- ----
---- ----1.91----1 29/32
49----1.93---- ----
---- ----1.94----1 15/16
50----1.97----1.97----1 31/32

[MstrCarpenter]

I have a "Harbor Freight Gem". It's a digital vernier caliper that I can switch between metric, decimal inches, and fractions (although it seems to land on 128ths more frequently than 16ths.) You can also zero it at any point, and it will display how much you move it. ((i.e Measure your shelf thickness and press "zero", measure your dadoe and it reads -.021". Add .020" shim to your dadoe stack for a snug fit!)

[daddo]

I have several different charts in the shop, including dimensions to make and thread bolts and nuts, gears, size belts, size pulleys, drill sizes for taps (max and min), sfpm for mill and lathe cutting tools for types of metal, and how far a bolt advances when it is turned 360* per it's tpi. Then there is the color chart for hardening and annealing metals.  Machining is a whole different ball game.

I find myself trying to adjust to measuring for wood working after machining.

[lift mechanic]

Thanks for pointing that out. my chart seems to be a little off all the way through, especially 100mm is way off.

[Edwin Hackleman]

Just wondering why woodworkers would need accuracy to the nearest 1/1000" or 1/10,000"?

For press fits and close joinery, such as when making tight box finger joints, accuracy to 1/1000" is often required, but I agree that accuracy to 1/10,000" is seldom required.

[lift mechanic]

In archery " aim small, miss small" same for woodworking.