OnRobot 3FG15

The OnRobot 3FG15 is an electric three-finger gripper for round and cylindrical workpieces. Three synchronized fingers centre the part as they close, which gives stable three-point contact and accurate positioning when loading machine chucks.

It can grip externally or internally. Depending on finger position and fingertips, external grip diameters range from 4 to 152 mm and internal diameters from 35 to 176 mm, with a maximum stroke of 150 mm. Payload is up to 10 kg force-fit with the normal grip (8 kg with the flexible grip) and 15 kg form-fit. The normal grip gives 10 to 240 N and is used when the diameter is known; the flexible grip, up to 140 N, handles parts of unknown or varying diameter. A brake holds the workpiece without power consumption, also if power is lost.

The gripper weighs 1.15 kg, is rated IP67 and runs on 20 to 25 V DC. Fingers and fingertips (steel, silicone, optional knurled or X-shaped) can be changed or customized.

Typical applications

• CNC lathe machine tending with cylindrical workpieces
• Material handling of round parts with internal or external gripping
• Assembly and insertion of cylindrical components