Useful Engineering Notes.

This page is a list of useful notes I had in a note book, and was getting increasingly tatty, so have put them here so I can refer to them when I need them. They are primarily for my use, but if they are of use to you too, then thats even better.

SWG - Metric - Imperial conversion

Imperial GaugeImperial in mmMetric Sheet in mm
10 3.25 3.0
12 2.64 2.5
14 2.03 2.0
16 1.63 1.5
18 1.22 1.2
20 0.91 0.9
22 0.71 0.7
24 0.56 0.6
26 0.46 0.5

Tapping/Drilling Sizes

Thread Drill Size
M32.5mm
M43.3mm
M54.2mm
M65mm
M86.6mm
M108.5mm
M1210.2mm
1/4"-20 UNC#7 or 13/64"

More complete selection of sizes here. Or on wikipedia Here.

Material Densities

Material Density (/cm3)
Mild Steel7.85g
Aluminium (6061)2.7g
Aluminium (7075)2.73g
Stainless Steel (304)8.03g
Delrin1.415g
ABS1.02 -1.21g
Polythene (HDPE) > 0.941g
Concrete2.3g

Suppliers

  • Aluminium Warehouse
  • Metals4u - Also sells Acetal

This page last modified Thursday, 04-Jul-2013 14:24:24 CEST.