Tank and lathe: what they have in common

1. Step 1. Tank — has part — Tank gun. A gun in a rotating turret.
2. Step 2. Tank gun — has part — Rifling. Rifled tank guns (today often smoothbore).
3. Step 3. Rifling — uses — Screw thread. Helical grooves.
4. Step 4. Screw thread — is used in — Screw-cutting lathe. The lathe cuts precise standard threads.
5. Step 5. Screw-cutting lathe — evolved from — Lathe. Maudslay added a lead screw and a slide rest.

Open Evothings