When should I use a mechanical gripper or a vacuum gripper?
A mechanical gripper holds a part through contact with jaws or fingers. A vacuum gripper uses suction to retain an object through suitable contact surfaces. The best choice depends on part shape, surface properties, available grip locations, required orientation, and the consequences of losing the load.
What this means in practice
Vacuum can suit broad, reasonably sealable surfaces, but porous materials, leaks, contamination, and surface variation affect performance. Mechanical gripping can suit irregular or rigid components, but jaw design and force control must prevent slipping or damage. Neither technology works reliably for every object.
Compare grip reliability under real conditions
Vacuum retention depends on the effective sealed area and the achievable pressure difference, with performance affected by leaks and surface conditions. Mechanical gripping depends on contact geometry, grip force, friction, and sometimes positive engagement. Both approaches require validation with the intended object.
Consider how the part behaves during rotation and acceleration, and whether a failed grip can be detected before transfer. Evaluate wear and utilities as well as purchase price. For some products, a custom combination or a supported transfer method offers better reliability than a general-purpose gripper.
Key points
Test retention under the actual acceleration and orientation.
Verify grip confirmation rather than relying only on a command signal.
Assess what happens if electrical power or compressed air is lost.
Practical example and next step
For mixed products, interchangeable fingers, multiple suction zones, or a combined tool may be appropriate. Evaluate cycle time, wear, maintenance, and consumable costs. Trials should include the worst representative parts, not only clean samples selected for a demonstration.