A compact electro-mechanical lifting jack that uses a trapezoidal lead screw + nut driven by a DC/AC gearmotor. Ideal for lifting/positioning machines, cars (demo), fixtures, and as a mechatronics project—precise, self-locking, and easy to control with limit switches.

Parts Used:

1. Frame & Base – Welded base with guide posts or anti-rotation key for the nut.
2. Lead Screw – Trapezoidal (e.g., Tr24×5) or ACME; hardened end for bearings.
3. Nut (Bronze/Polymer) – Flanged nut with grease ports; optional anti-backlash pair.
4. Thrust & Radial Bearings – Tapered/ball + thrust bearing stack to take axial load.
5. Gearmotor – 12/24 V DC or 230 V AC worm/planetary gearmotor (high torque, low rpm).
6. Coupler – Jaw/rigid coupler between motor and screw (or belt stage).
7. Lifting Saddle/Pad – Swivel cap to seat on load; safety grooves.
8. Limit Switches – Top/bottom travel; mechanical stops as hard limit.
9. Power & Control – H-bridge/DPDT contactor, fuse/MCB, E-stop, current sensor (overload), optional encoder.
10. Guards & Guides – Bellows/guard tube over screw; side guides to prevent wobble.
11. Lubrication – Grease for screw/nut and thrust bearing.