Specifying Grips and Fixtures

Whether you have an ADMET testing machine or another brand, we have the grips and fixtures you need. Selecting the proper grip or fixture depends upon the characteristics and dimensions of your sample, and the type of test you want to conduct.

We have literally hundreds of grips and fixtures available and we are here to help you choose the ones that best meet your needs. Fill out the form below and send it to us, or call 1-800-667-3220 to speak with one of our test engineers.

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What is the capacity of the machine?
What are the dimensions of your sample(s)?
Describe the material you are testing.
What type of test?	Tension
	Compression
	Flexural
	Per Specification

Based on descriptions below, which type of grip/fixture do you think will work best?
	Wedge Grip: Ideal for higher loads (>20kN, 4500lb) and metal or hard material samples. As tension loads are increased, the wedge shape of the inserts forces them to clamp harder onto the sample. Can be used with flat or round samples by installing appropriate inserts.
	Vice Grip: Typically for lower loads (<50kN, 11,250lb) and soft metal or plastic samples. Inserts are available with smooth, rubber, serrated, or diamond coated faces. Inserts can also be specified in various widths depending upon the sample.
	Hydraulic and Pneumatic Grips: Hydraulic grips are normally wedge design and for high capacity (>300kN, 67,500lbs). Pneumatic grips are typically vice style and have similar capacity capability as the manual type. Pneumatic grips are used where you have a large number of samples to test and need the speed and ease of use pneumatic grips provide. Hydraulic grips are powered by the testing machine or a separate pumping unit. Pneumatic grips require shop air or a compressor. Both have either foot or hand controls.
	Threaded Grips: Are used for threaded, round metal samples. Since the sample is threaded into the insert of the grip, there is no chance of slippage. They are a good choice for high capacity testing. Thread size of inserts must be specified.
	Wire and Rope Grips: The wire or rope is wound around the bollard and then held with the vice grip. Manual grips have capacities up to 100kN (22,250lb). Hydraulic models can go to 250kN (56,250lb).
	Compression Platens: Platens come in many shapes and sizes. Round, square, 2 inch diameter, 2 feet square, etc. Capacities range from 1kN (225lb) to 2000kN (450,000lb). Size and capacity is all you need to know to choose a platen.
	Flexural Fixtures: Available in either a 3 point design (shown), or 4 point, which adds a second support on the top. Capacities from 2.5kN (563lb) to 600kN (135,000lb). The space between the supports is variable, depending upon the sample size. Interchangeable supports with various diameters are available on some models.
	Double Shear Fixture: Typically used for testing bolts and fasteners. The fastener joins the upper and lower sections of the fixture and then pushing or pulling on the fixture shears it. These fixtures are high capacity and bolt diameter must be specified. This is one of many shear fixtures available for all types of shear tests.
	Peel Test Fixture: There are a variety of peel test fixtures depending upon the material being tested and what the specification outlines. Shown is a 90-degree peel test fixture with a sliding base. Normally these are low force tests < 2.5kN (560lb). Supply us with the specification you need to test to and we will supply the correct fixture.

Mail: ADMET, 51 Morgan Drive, Norwood, MA 02062, USA.
E-Contact:sales@admet.com; webmaster:webmaster@admet.com
tel. (781) 769-0850 fax (781) 769-0884