Pinch Grips
Pincer and Pinch grips are both used to grab small areas of a sample for a tensile test. These fixtures are ideal for testing end-consumer products because the grip actuation resembles two fingers pinching together and pulling on something.
Pinch grips are spring loaded, so the grip exerts a constant lateral force on the sample. The spring can be tensioned in such a way so as to increase or decrease the amount of pinching force. By turning the knob at the end of the grip, the amount of pinching force can be finely adjusted.
Pincer grips use a vise screw to actuate the fixture and close the two sides in on themselves. Pincer grips are great for getting into tight spaces. They are commonly used for pull-off testing of components on printed circuit boards. Pneumatic versions of the pincer style fixtures are also available.
Pinch Grip with a Chain pull-testing a Freshness Seal
ASTM F2824 Tensile test on Flexible Peelable Lids using a pinch grip and 90 degree peel fixture.
