Application: Assistance of automated ‘O’-Ring or Seal placement/installation.

Range of Capability: Spreading and placement of ‘O’-Ring or Seals .250” diameter and larger.

Design: Pneumatically operated gripping, spreading and placement of Seals or ‘O’-rings [with the assistance of automated ‘O’-Ring placement machines] via a dual piston mechanism, one being housed within the other yet independently functioning/operating. Per an association of connecting rods and piston the spreading jaws operate in an in & out, or open and close motion, while the ejector jaws are piston operated [only] during the ejection/extension part of the cycle with a spring operated return/retraction.

Models: [3] sizes available.

AGP-6-OR handles up to 3” i.d. seals or rings.

AGP-8-OR handles up to 12“ i.d. seals or rings.

AGP-10, the new and largest model, is a very robust, heavy duty unit, and without limitation can handle any size ring with the assistance of specifically designed spreading fingers.

Note: AGP-8 & AGP-10 offer thru-hole design, allowing for installation of seals and rings along the lengths of shafts or columns.

AGP-8 has a 1.500” thru-hole.

AGP-10 has a 2.250” thru-hole.

All models are designed to facilitate part ejection and/or part seating; ideal when an ejector is needed for part placement or when a seal is to be placed along a shaft.


AGP-6-OR features [6] spreading jaws and [6] ejector jaws. Lightweight and versatile.

AGP-8-OR & AGP-10-OR each feature [8] spreading jaws and [8] ejector jaws, [plus thru-hole design].

T–slot designed bearing guides provide spreading jaws resistance to moment loads.

Large diameter pistons provide adequate force for spreading large ‘O’-Ring cross sections even in hard durometer materials.

Vertical or horizontal use.

No lubrication of ‘O’-Rings necessary while installing.

It should be noted that the further outward the spreading jaws are utilized during the stroke cycle, the greater the amount of force applied to the ‘expansion of the O’-Ring/Seal. The action/angle of the connecting rods and relative internal mechanisms apply an ever increasing force along the spreading jaws as they move outward. This feature should be taken into account during design stages of assembly machines.

Function: a] Pneumatic actuated grippers utilizing [2] independent pistons. Spreading jaws are double acting. Ejector jaws are single acting. Applying air pressure to the former actuates the parallel jaws, expanding an ‘O’-ring or Seal into an octagon shape. An ‘O’-ring or Seal stretched in this manner creates less deformation than other processes common to installation. [The expansion stroke can be adjusted via easily-accessible set-screw[s].]

b] When the ‘O’-Ring/Seal is expanded and positioned for installation, air pressure is applied to the remaining piston. Per this process, ejector jaws will dislodge, [pushing], the ‘O’-Ring/Seal from the spreading jaws and onto the assembly part.

‘O’-Ring grippers can be tooled to accommodate all types of rings and seals, from very small to very large. It is up to the imagination of the engineer to utilize the motions provided by these designs to achieve a desired outcome. [AGI does not design nor produce ‘fingers’ or ‘jaws’ for end customer applications.]

Sensing: Per all models, available for end-of-stroke on both spreading and ejection.


AGP-6-OR is 2.500” dia. x 2.700” tall.

Spreading jaws have 14-55 lbs. force [each] @80 psi *

Ejector jaws have 80 lbs. force [combined] @80 psi.

AGP-8-OR is 5.000” dia. x 5.000” tall.

Spreading jaws have 70-462 lbs. force [each] @80 psi.*

Ejector jaws have 320 lbs force [combined] @80 psi.

AGP-10-OR is 7.000” dia. x 7.000” tall.

Spreading jaws have 112-1230 lbs. force [each] @80 psi.*

Ejector jaws have 750 lbs. force [combined] @80 psi.

* [ Depending where in the cycle of stroke it is measured. The farther the spread or opening of jaws, the stronger the force. This exponential force {curved} applies to all AGP-OR Grippers. Also, keep in mind these are ‘no’-friction numbers. Every application will entertain a different coefficient of kinetic friction depending on finger design, {height & length}, and should be taken into consideration during design stages of assembly equipment ].