3FG15 Three Finger Gripper

The 3FG15 is ideal for gripping a wide range of cylindrical objects in machine-tending applications such as CNC lathe machines. The gripper’s design automatically centers workpieces, resulting in fast deployment with a strong, stable grip and precise placement. With a payload of up to 15kg, the 3FG15 competes with larger, bulkier, and much less flexible finger grippers. Like all OnRobot grippers, the 3FG15 offers seamless integration with the robots of your choice.

  • Description
  • Specifications

The 3FG15 three-finger gripper has an impressive maximum stroke of 150mm and a sleek design that can easily handle multiple processes. It is ideal for gripping a wide range of cylindrical objects from 20mm to 150mm wide in machine-tending applications such as CNC lathe machines, insertion applications, and even palletizing. The 3FG15 provides a strong, stable grip for both form fit (inside the object) or friction fit (external) gripping, adding flexibility to your implementation. The gripper’s design automatically centers workpieces, resulting in a strong, stable grip and precise placement in machine chucks. With a payload of up to 15kg and gripping force from 10 N to 240 N, the 3FG15 competes with larger, bulkier, and much less flexible finger grippers.

  • Precise, Stable Grip
  • Large Stroke, up to 150mm
  • High Payload, up to 15 kg
  • Gripping Force 10-240N
  • Easy Deployment
  • Customisable Fingertips
3FG15
General PropertiesMinimumTypicalMaximumUnit
Payload force fit--10[kg]
Payload form fit--15[kg]
Grip Diameter*External4-152[mm]
Internal35-176[mm]
Finger position resolution-0.1[mm]
Diameter repetition accuracy-0.10.2[mm]
Gripping force10-240[N]
Gripping force (adjustable)3-100[%]
Gripping speed (diameter change)--125[mm/s]
Gripping time (including brake activation)**-500-[ms]
Hold workpiece if power loss?Yes
MotorIntegrated, electric BLDC
IP ClassificationIP67
Dimensions [L, W, Ø]156 x 158 x 180[mm]
* With the scope of delivery
** 10 mm diameter distance. Also see section Finger movement and force on page 6


Operating ConditionsMinimumTypicalMaximumUnit
Power supply202425[V]
Current consumption43-1500*[mA]
Operating temperature5-50[°C]
Relative humidity (non-condensing)0-95[%]
Calculated MTBF (operating life)30--[Hours]
*600 mA set as default.




Alstrut India Private Limited
267, Kilpauk Garden Road,
Chennai - 600 010, India
+91 44 4294 9000
info@alstrut.com
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