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3FG15 Three-Finger Gripper

Sample image only. Product may differ
The OnRobot 3FG15 is an electric three-finger gripper for collaborative robots, designed for handling cylindrical, spherical, and irregularly shaped parts. It supports centric gripping and software-controlled force and stroke, operating without compressed air or external controllers. The 3FG15 is intended for applications where parts cannot be reliably handled with parallel two-finger grippers.
Typical uses include:
- Handling round, cast, or forged components
- Machine tending where parts vary in geometry
- Assembly operations requiring centering grip
- Pick-and-place of irregular or asymmetrical objects
A combination of the below options are included with your purchase depending on the model selected:
- 1x robot side quick changer
- 1x tool mounting flange
- 1x cabling kit
- 1x robot kit (The robot kit is required for Ethernet IP communication and software updates for all OnRobot tooling.)
Key Technical Specifications
| General Properties | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Payload | - | - | 15 | kg |
| Stroke (total) | - | - | 120 | mm |
| Gripping force (per finger) | 25 | - | 150 | N |
| Repeatability | ±0.05 | mm | ||
| Grip mode | Centric | |||
| Hold workpiece on power loss | Yes | |||
| Power supply | 20 | 24 | 25 | V DC |
| IP classification | IP54 | |||
| Weight | 2.1 | kg | ||
| Operating temperature | 0 | - | 50 | °C |
Electric Three-Finger Gripping
The 3FG15 uses three synchronized fingers to create a centric gripping motion, allowing parts to be automatically centered during pickup.
Key characteristics:
- Electric operation with no pneumatic supply
- Three-finger centric gripping
- Software-adjustable gripping force and stroke
- Designed for collaborative robot payload limits
Collaborative Robot Compatibility
The 3FG15 integrates with major collaborative robot platforms using robot-specific mechanical and software interfaces.
Supported cobot brands include:
- Universal Robots
- FANUC (CRX Series)
- ABB
- KUKA
- Doosan Robotics
- Techman Robot



