Design & Build Prototype — Contactless Magnetic Lead Screw (Rotary-to-Linear Actuator)
Budget: ₹12,500 – ₹37,500 INR
Core specifications
• Mechanism: magnetic lead screw — rotary input → linear output, force transmitted magnetically (no contact between screw and nut)
• Stroke: ~3000 mm (3 m)
• Load to move: up to ~60 kg horizontally (friction-limited; expected working thrust ~200–400 N)
• Pull-out / slip force: ≥ ~800 N target (must not lose sync under load)
• Motion: bidirectional
• Rotating shaft enclosed in a non-magnetic stainless sheath; magnet/nut carrier sealed
• Drive: external servo motor (rotary), coupled through a sealed feedthrough
• Speed: flexible — propose what’s practical (low speed is acceptable)
• Duty: light (a few cycles per day)
Key challenge to address in your proposal
The 3 m rotating shaft — how you’ll manage critical speed/whirl and deflection over that length (shaft sizing, support strategy, rpm limits). This is the main technical risk.
Target operating environment (design direction; full hardening can be a later phase)
Corrosion-resistant stainless construction; capable across roughly −50 °C to +125 °C; compatible with humid/wash-down and low-pressure (vacuum) conditions. Magnet grade to be chosen for thermal stability (e.g. SmCo or high-temp NdFeB).
Deliverables
1. Concept design + electromagnetic FEA (thrust vs. displacement, pull-out force, air-gap sensitivity)
2. Short rotordynamics / critical-speed analysis for the 3 m shaft
3. Mechanical design package: CAD, drawings, BOM
4. A working physical prototype demonstrating stroke, load and contactless operation
5. Test report against the specs above
6. All design/analysis files, with rights assigned to us
Ideal skills / experience
• Permanent-magnet / electromagnetic design and FEA (magnetic couplings, magnetic gears, Halbach arrays, linear motors)
• Precision mechatronic and mechanical design
• Servo drives and motion control
• Prototype fabrication, precision machining, magnet assembly
Please include in your proposal
• Relevant past projects (ideally magnetic couplings / gears / actuators) with photos or results
• Your proposed approach, especially for the 3 m shaft
• Rough timeline and budget, split into design phase and prototype build
• Any assumptions or questions
Notes: We’ll sign an NDA and share more detail on request. All IP and deliverables assign to us. Milestone-based engagement preferred: design → review → build → test.
• Mechanism: magnetic lead screw — rotary input → linear output, force transmitted magnetically (no contact between screw and nut)
• Stroke: ~3000 mm (3 m)
• Load to move: up to ~60 kg horizontally (friction-limited; expected working thrust ~200–400 N)
• Pull-out / slip force: ≥ ~800 N target (must not lose sync under load)
• Motion: bidirectional
• Rotating shaft enclosed in a non-magnetic stainless sheath; magnet/nut carrier sealed
• Drive: external servo motor (rotary), coupled through a sealed feedthrough
• Speed: flexible — propose what’s practical (low speed is acceptable)
• Duty: light (a few cycles per day)
Key challenge to address in your proposal
The 3 m rotating shaft — how you’ll manage critical speed/whirl and deflection over that length (shaft sizing, support strategy, rpm limits). This is the main technical risk.
Target operating environment (design direction; full hardening can be a later phase)
Corrosion-resistant stainless construction; capable across roughly −50 °C to +125 °C; compatible with humid/wash-down and low-pressure (vacuum) conditions. Magnet grade to be chosen for thermal stability (e.g. SmCo or high-temp NdFeB).
Deliverables
1. Concept design + electromagnetic FEA (thrust vs. displacement, pull-out force, air-gap sensitivity)
2. Short rotordynamics / critical-speed analysis for the 3 m shaft
3. Mechanical design package: CAD, drawings, BOM
4. A working physical prototype demonstrating stroke, load and contactless operation
5. Test report against the specs above
6. All design/analysis files, with rights assigned to us
Ideal skills / experience
• Permanent-magnet / electromagnetic design and FEA (magnetic couplings, magnetic gears, Halbach arrays, linear motors)
• Precision mechatronic and mechanical design
• Servo drives and motion control
• Prototype fabrication, precision machining, magnet assembly
Please include in your proposal
• Relevant past projects (ideally magnetic couplings / gears / actuators) with photos or results
• Your proposed approach, especially for the 3 m shaft
• Rough timeline and budget, split into design phase and prototype build
• Any assumptions or questions
Notes: We’ll sign an NDA and share more detail on request. All IP and deliverables assign to us. Milestone-based engagement preferred: design → review → build → test.
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CAD/CAM
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Mechatronics
Manufacturing Design
Mechanical Design