Which category is used for precise grasping?

• A. Mechanical fingers
• B. Pneumatic grippers
• C. Vacuum grippers
• D. Soft/adaptable grippers

Answer: (A)

Precise grasping relies on rigid, well-defined contact points and controllable finger positioning. Mechanical fingers deliver that because their joints and links form a fixed, known geometry that can be driven by precise actuators, giving repeatable finger positions and forces. This enables accurate alignment to a part, secure grip, and minimal slip, which is essential for handling small or tightly toleranced components.

In contrast, pneumatic grippers rely on air pressure, which makes the fingers compliant and easier to deform under load; they grip quickly but with less predictable contact, reducing precision. Vacuum grippers depend on suction and surface contact, which can be highly dependent on surface geometry and may not provide exact positioning for irregular shapes. Soft or adaptable grippers use compliant materials to accommodate shapes, but that compliance introduces variability in grip pose and force, compromising precision. So for tasks that demand exact grasp positioning and repeatable results, mechanical fingers are the best choice.