Best Cobot Gripper for Small Parts Handling

A good cobot gripper for small parts is light, compact, repeatable, and gentle enough to handle parts that are easy to damage. On a cobot, those four requirements are not independent — they trade against each other, and that trade is what makes the selection harder than it looks.

Small parts handling covers a wide range: connectors, small housings, lenses, sensors, PCB assemblies, and machined components. What these have in common is low mass, often a delicate surface, and a station that has to stay flexible.

The cobot constraint that changes everything

An industrial robot usually has payload to spare. A cobot does not, and this reshapes the whole selection.

Constraint	Consequence for the gripper
Rated payload includes the tool	Gripper weight and fingers come directly off the part weight the arm can carry
Wrist is small and close to the work	A bulky gripper reduces reach and can collide with fixtures
Collaborative operation	Sharp edges and pinch points matter more than on a fenced cell
Redeployment is expected	The gripper should be quick to mount, re-cable, and re-teach
Often programmed by operators	Force and position should be simple to set, not buried in a controller menu

This is why an integrated electric gripper — one with the drive and control inside the body — is usually preferred at a cobot wrist. It removes the controller box and reduces what has to be routed along the arm.

Why small parts often favour electric gripping

• Force limiting. A controlled maximum force protects surfaces that a standard pneumatic gripper would mark on contact.
• Position feedback. The controller can confirm that the fingers reached the expected position, which is effectively a presence check.
• Programmable stroke. One station can run several part sizes without mechanical changeover.
• Quiet, clean operation. No exhaust air, which matters in electronics and inspection areas.
• Compact integration. Fewer external components on a wrist that has little room.

What to measure before choosing

Input	Why it drives the decision
Part weight and size	Sets the payload requirement once tool weight is subtracted
Gripping location and allowed contact area	Determines whether standard fingers work or custom fingers are needed
Surface sensitivity	Decides pad material and whether force must be limited
Position accuracy required	Separates “hold the part” from “place the part” requirements
Cycle time	Affects both gripper speed and the arm’s usable acceleration
Number of product variants	Justifies programmable stroke and force, or rules it out
Cobot model	Fixes the flange, payload, and available mounting space

Matching the direction to the task

Task	Gripper direction	Reason
Pick and place flat parts into trays	Compact parallel, short stroke	Stable hold, minimal wrist load
Handling small cylindrical parts	Parallel with V-groove fingers	Centers the part without a 3-jaw mechanism
Connector insertion	Parallel with limited force	Force control prevents damage on seating
Testing and inspection stations	Parallel with position feedback	Confirms presence and grip position each cycle
Mixed product families	Parallel with wide stroke and set per product	Changeover becomes a parameter change
Fragile or coated surfaces	Soft pads, limited force	Contact pressure stays within what the surface accepts

Cable routing and fingers — where cobot cells fail

Two details cause more downtime on cobot cell retrofits than the gripper itself:

• Fingers. Because small parts need precise contact, the fingers are usually custom. Their stiffness matters — long, thin fingers flex under load and silently lose placement accuracy. Replaceable pads on the contact face reduce long-term maintenance.
• The cable at the wrist. A cable that binds or rubs through a full wrist rotation fails in weeks. Route it with a service loop, secure it close to the flange, and check the full range of motion before production starts.

Signs a gripper is a poor fit for a cobot

• Requires a separate controller box that has to be mounted somewhere on the arm or nearby
• Fingers cannot be changed without dismantling the gripper
• Force adjustment requires mechanical work rather than a setting
• Weight and body size leave little usable payload or reach
• Communication requires a fieldbus the cobot controller does not support

Frequently asked questions

How much payload does a cobot gripper consume?

All of it counts — gripper body, fingers, mounting adapter, cable, and the part. On a cobot with a modest payload rating, a heavy metal gripper can consume a substantial share before any part is picked up. This is the main reason lightweight, integrated grippers are preferred.

Do I need a 3-jaw gripper for small round parts?

Usually not. Small cylindrical parts are often handled well by a parallel gripper with V-groove fingers, which centers the part without the extra mechanism and weight of a three-finger design.

Is force control necessary for small parts?

It depends on the part. Rigid metal components tolerate a wide force range. Plastics, coated parts, lenses, and thin-walled housings often need the force capped, which is where an electric gripper earns its cost.

Can one gripper handle a whole product family?

Often yes, if the stroke range covers the parts and the force can be set per product in the program. This is one of the strongest arguments for electric gripping in high-mix, low-volume production.

How do I know the part is actually gripped?

Use the position feedback from the gripper. If the fingers reach the expected position, the part is present and correctly sized; if they close further than expected, the grip is empty. This replaces a separate presence sensor in many small-part stations.

Image reference

Two models to compare for collaborative robots

EPGC-50-150 lists 50 mm stroke, 3 kg maximum recommended clamping load, 40–150 N sustained force and IP54. EPG2-100-50 lists 100 mm stroke, 2 kg maximum recommended clamping load and 15–50 N force. Review the combined gripper, finger and part mass against the robot payload.