Like before, I made this at TechShop (www.techshop.ws).
Step 1: Parts and Equipment
The caliper is mostly made up of steel scraps that I had on-hand, but if you had to buy everything it’d probably cost about $20-25 from your local hardware depot.
1 in. x 1 in. x ⅛ in. steel angle, total of 12 linear inches
1 in. x ⅛ in. steel flat bar, total of 6 ½ linear inches
2 x #6-32 x 1” machine screws
4 x #6-32 nuts
1 magnet (I used a 40mm 15 lb pull round magnet from Harbor Freight, but anything similar would be fine)
You’ll need the following equipment:
- angle iron notcher
- drill press, 5/32 in. bit
- cold saw or vertical bandsaw
- Dremel tool with cutting disk
- hand file