For tensile testing rubbers, plastics, elastomers, textiles, cloth, and paper, in specimen geometries such as plates, films, and wires, a good option is pneumatic flat grips. Quick clamping and a repeatable clamping force are advantages of pneumatic flat grips.
Available with maximum capacities up to 10 kN (2,200 lbf) for standard grip sets and up to 5 kN (1,100 lbf) for bellows-type grip sets. The main difference between these two types of pneumatic flat grips is their operational temperature range: -10 to 180°C (14 to 356°F) for the standard set and the bellows-type set withstands -70 to 200°C (-94 to 392°F).
1 kN (220 lbf), 5 kN, and 10 kN pneumatic grip sets are supplied with single-side file-teeth grip faces, and the 50 N (11.0 lbf) grip sets come with flat grip faces installed. Additional grip face options, including wave, rubber-coated, and high-strength rubber-coated, are available. See the document on Grip Faces for Pneumatic Flat Grips for further details.
The air pressure range of these grips is 0.2 MPa (2 kgf/cm2, 29 psi) to 0.7 MPa (7 kgf/cm2, 102 psi). A 0.7 MPa (7 kgf/cm2, 102 psi) air compressor is needed to operate the grips. In certain regions, an air compressor is available as an accessory.
Opening and closing of grips can be controlled by: a foot valve unit, an F-type crosshead-linked foot switch, a hand-operated switching unit, the smart controller on AG-X plus models, and the main operation panel on AGS-X 20 kN (4,400 lbf) and above frame capacity models.
The foot valve unit is applicable to all AG-X plus series, AGS-X series, and EZ-X series models and is the most commonly used grip operator. The other grip control options are supplied to fit specific models and are available as part of pneumatic flat grip kits, which include upper and lower grips, grip faces, and a grip controller. Please contact your local Shimadzu representative for information about pneumatic flat grip kits.
In addition, for operator protection, finger guards are available based on the type of grip faces installed. For the bellows-type grip sets, finger guards come as standard. Finger guards for standard grip sets need to be ordered along with the grips because a grip modification is needed.
Additional items needed for operation:
- An external 0.7 MPa (7 kgf/cm2, 102 psi) air compressor