Hydraulic Press Working Model using Bottle Jack

Pascal's law — pressure applied to a confined fluid transmits equally in all directions — is easy to state and hard to feel, until a student pumps a small handle and watches a bottle jack lift or crush with tonnes of force. This project turns that experience into a complete final-year build: a 2-ton bottle jack mounted inverted or upright in a welded MS H-frame, driving a moving platen against a work bed fitted with V-blocks and pressing fixtures. With it the student demonstrates bending a small strip, pressing a bearing onto a shaft, and straightening a bent rod — real workshop operations at demonstration scale. The engineering content is the force analysis: from the jack's pump-piston and ram diameters the student computes the theoretical force multiplication, measures their own handle effort with a spring balance, and reconciles the two through the jack's lever ratio — Pascal's law verified with the student's own hands on the handle.

1. Place the workpiece on the bed fixtures (V-blocks for bending, mandrel for bearing pressing) and lower the platen near it.
2. Close the jack's release valve and pump the handle — each stroke drives a small volume of oil from the pump piston to the ram cylinder.
3. Pressure builds equally throughout the confined oil (Pascal's law); acting on the large ram area it produces the pressing force on the platen.
4. Continue pumping until the operation completes — the strip bends, the bearing seats, or the gauge (if fitted) reaches the target pressure.
5. Open the release valve — oil returns to the reservoir and the return springs lift the platen back to rest.
6. For the Pascal's-law check: measure handle effort with a spring balance, multiply through the handle lever ratio and the piston-area ratio, and compare the theoretical ram force with the jack's rated capacity.
7. Repeat the demo operations and record handle strokes, effort and results in the observation sheet.

Tech stack:

• 2-ton hydraulic bottle jack
• Welded MS channel H-frame
• Guided moving platen
• Work bed with V-blocks and fixtures
• Return springs
• Spring balance (effort measurement)
• Optional hydraulic pressure gauge
• Front safety guard

• [2-ton bottle jack as the power unit] A standard, off-the-shelf 2-ton hydraulic bottle jack — cheap, serviceable and familiar to every workshop — is the heart of the press.
• [Welded steel H-frame] A rigid MS channel H-frame carries the jack and resists the full pressing load with a calculated factor of safety.
• [Moving platen and work bed] A guided platen transmits the ram force evenly, and the bed accepts V-blocks and pressing fixtures for different demo operations.
• [Pascal's law verification] The student computes theoretical force multiplication from pump-piston and ram diameters and checks it against spring-balance handle-effort measurements.
• [Demo operations] Bending a strip, pressing a bearing, straightening a rod — three real operations the student performs and documents.
• [Spring-return assist] Return springs retract the platen when the jack's release valve is opened, resetting the press for the next cycle.
• [Pressure gauge port] A gauge tapping on the jack circuit (optional fitment) lets the student read hydraulic pressure during a press.
• [Safety stops and guarding] Mechanical stops limit platen travel and a front guard keeps hands clear of the pressing zone.

• Fabricated H-frame press with platen, bed and fixtures
• 2-ton bottle jack
• V-blocks, bending and pressing fixtures
• Return springs and safety stops
• Front safety guard
• Spring balance for effort measurement
• Pascal's-law calculation sheets (blank, for your measurements)
• Project report PDF (hydraulics theory, frame design, procedure)
• PPT presentation for final review
• Viva Q&A preparation document