Mechanical · Design and analysis (CAD/FEA) · Final year project
Design & Fabrication of Motorized Scissor Jack
A scissor jack driven by a motor instead of a hand crank. The motor turns the jack's lead screw to raise or lower the car, powered from the vehicle's 12 V supply, so changing a tyre takes less effort.
What is the Design & Fabrication of Motorized Scissor Jack project?
A scissor jack driven by a motor instead of a hand crank. The motor turns the jack's lead screw to raise or lower the car, powered from the vehicle's 12 V supply, so changing a tyre takes less effort.
Key facts
- Branch
- Mechanical & Automobile Engineering; also suits Mechatronics
- Type
- Final year project · Intermediate
- Suitable for
- Diploma capstone and B.E / B.Tech final year
- Build time
- 4 to 6 weeks
- Estimated component cost
- ₹8,400 – ₹12,300
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Design & Fabrication of Motorized Scissor Jack works
- The mild steel frame and fabrication forms the base that carries every other part, so it is designed first from the load and size of the machine.
- The DC geared motor provides the driving motion.
- The Hydraulic jack / cylinder gives large force from a small input using fluid pressure.
- Motion is transmitted through DC geared motor and linkages, cam and lever parts, which set the speed, torque and direction at the working end.
Block diagram
Power
DC geared motorHydraulic jack / cylinderTransmission
DC geared motorLinkages, cam and lever partsWorking unit
Linkages, cam and lever partsHydraulic jack / cylinderStructure
Frame and mountsComponents list and cost
Typical prices from Indian online stores and electronics markets (Lamington Road, Budhwar Peth, SP Road). Buy from one store where you can to save on shipping.
| Component | Qty | What it does | Approx. cost |
|---|---|---|---|
| DC geared motor | 1 | Provides the driving motion. | ₹250 |
| Linkages, cam and lever parts | 1 | Convert one type of motion into another. | ₹400 |
| Mild steel frame and fabrication | 1 | Forms the main structure that holds all parts. | ₹2,500 |
| Hydraulic jack / cylinder | 1 | Gives large force from a small input using fluid pressure. | ₹1,500 |
| Hydraulic hoses and fittings | 1 | Needed for this type of build. | ₹900 |
| Welding, cutting and machining labour | 1 | Needed for this type of build. | ₹2,200 |
| Supporting Arms | 1 | Part from the design specification | ₹400* |
| Joints | 1 | Part from the design specification | ₹400* |
| Mounts, screws, nuts and small hardware | 1 | Enclosure, mounts and fasteners. | ₹300 |
| Paint, finishing and workshop consumables | 1 | Project overhead | ₹600 |
| Transport of material | 1 | Project overhead | ₹400 |
| Estimated total | Varies with brand, quality and city | ₹8,400 – ₹12,300 |
Prices are estimates for budgeting; items marked * depend on the exact size or model chosen. We confirm the bill of materials when your design is frozen, and components are charged at actual cost with bills.
How much does this project cost?
| Option | What you get | Cost |
|---|---|---|
| Components only | You buy the parts and build it yourself | ₹8,400 – ₹12,300 |
| Hardware / IoT Final Year | Working model or guided build, Circuit diagram and bill of materials, Firmware / code with explanation | from ₹9,999 + components |
| Capstone Project (CPE) | Working project or model, Black book in MSBTE format, Step-by-step explanation | ₹9,999 + components |
| Diploma ITR | 100% working source code, Project report PDF, PPT | ₹1,999 + components |
No GST and no hidden charges. Use the cost calculator for a quote with your deadline and add-ons, or see all plans.
Download the project brief (PDF)
Summary, working, components and cost and viva questions on one branded PDF to show your guide or team. To get it developed, contact us on WhatsApp.
What you submit with this project
- Working model with circuit diagram and program code
- Project report or black book in your university's chapter order (block diagram, circuit, calculations, results)
- Presentation for the review and final viva
- Synopsis for topic approval, if your college asks for one
Mechanical viva questions on this project
What is the aim of the Design & Fabrication of Motorized Scissor Jack project?
A scissor jack driven by a motor instead of a hand crank. The motor turns the jack's lead screw to raise or lower the car, powered from the vehicle's 12 V supply, so changing a tyre takes less effort.
Explain the working of your project in short.
The mild steel frame and fabrication forms the base that carries every other part, so it is designed first from the load and size of the machine. The DC geared motor provides the driving motion. The Hydraulic jack / cylinder gives large force from a small input using fluid pressure. Motion is transmitted through DC geared motor and linkages, cam and lever parts, which set the speed, torque and direction at the working end.
Why is a geared motor used?
The gearbox reduces speed and multiplies torque, so a small DC motor can move a vehicle or mechanism smoothly. Torque increases roughly by the gear ratio.
What does a cam-follower mechanism do?
It converts rotary motion of the cam into reciprocating motion of the follower, with the displacement profile set by the cam shape.
Why is mild steel used for the frame?
It is cheap, strong, easy to cut and weld and widely available. A frame of 25 mm square pipe is enough for most student models.
What is Pascal's law?
Pressure applied to a confined fluid is transmitted equally in all directions. A small force on a small piston creates a large force on a larger piston.
Which material did you select for the main parts and why?
Mild steel (MS) is used for the frame because it is strong, cheap, easy to cut and weld and available everywhere. Shafts are made of EN8 or bright mild steel for strength, and parts that do not carry load can be aluminium or acrylic to reduce weight.
What factor of safety did you take in your design?
A factor of safety of 2 to 3 is taken for static parts and 3 to 5 for parts under shock or fatigue loading. Allowable stress = yield strength ÷ factor of safety, and each part is checked against it.
How did you estimate the cost of the project?
The cost is the sum of raw material, bought-out parts, machining or fabrication and overheads. Our estimate for this model is about ₹8,400 to ₹12,300, depending on size, material and the workshop rates in your city.
Which manufacturing processes were used?
Cutting and grinding of sections, arc or MIG welding of the frame, drilling for mounting holes, turning of the shafts and fitting of bearings and the drive, followed by assembly, alignment and painting.
Is your system open-loop or closed-loop?
Mainly open-loop: the controller runs the actuators for a set time or number of steps. Adding a sensor for feedback would make it closed-loop and more accurate.
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