Schunk - PGN+ Permanent Sets New Gripping Standards

The SCHUNK PGN-plus Permanent has been seamlessly integrated into the PGN-plus family.

SCHUNK is raising the bar with the new PGN-plus Permanent gripper! The complete contour of the patented multi-tooth guidance is equipped with grease pockets, which ensures a continuous and more even distribution of lubricant, even with short strokes. This increases the already great life span of the gripper, and makes it practically maintenance-free. It reduces operating costs and ensures excellent repeat accuracy of 0.01 mm. The gripper is equipped with an oval piston drive, ensuring high forces in confined spaces.


The PGN-plus family has been successfully used in applications with high temperatures, contaminants, and aggressive media, as well as in clean rooms and explosive environments. On request, the modules are available with spring assist for mechanical gripping force maintenance, combined with compensation units for compensating angle errors, with force intensifier, or as a special precision version.

The SCHUNK PGN-plus Permanent has been seamlessly integrated into the PGN-plus family. A whole range of automated applications can be reliably implemented with the universal gripper. Many industries will benefit from this gripper; machine/system loading in the metal cutting industry, in foundries, assembly applications in the automotive and electrical industry, and to delicate handling tasks in the medical and pharmaceutical industry.

SCHUNK underlines the extraordinary performance of this universal gripper with a unique extended warranty, which is second to none on the market. The PGN-plus Permanent is available in the unit sizes 50 to 125. An expansion of the existing PGN-plus series is planned.

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T.J. Davies' Retention Knobs

T.J. Davies' Retention Knobs

The retention knob or pull stud is a critical component to the tool holder's performance and cutting tool life. T.J. Davies' retention knobs are the highest quality retention knobs on the market. Our retention knobs, also called pull studs, are made in American from American drawn steel. For over 50 years, we have been second to none. We utilize 8620 and 9310 alloy steel for its high tensile strength to withstand strong centrifugal force, high load force, high feed rate, and difficult-to-machine material in the era of current CNC machining environment. As the forces exponentially increase, precision and strength in machining and tooling requires a higher quality of the retention knob or pull stud connecting the spindle to the tool holder.