Model 643 Compression Platens are made from case-hardened alloy steel with hard chrome plating. The platens have a smooth face with etched concentric rings, enabling the specimen to be centered visually for better test results. The upper platen is available with a spherical seat for improved alignment and ensuring even pressure across the entire surface of the specimen. Model 643 compression platens are offered in three configurations: Fixed & Spherical, Two Fixed, and One Fixed.

Units range in diameter from 60 mm (2.4 in) to 300 mm (12 in) and are designed for a unit stress of 689 MPa (100,000 psi) static (275 MPa (40,000 psi) dynamic) centered on the bearing surfaces. The usable temperature range is -129°C to 177°C (-200°F to +350°F).

Model 643 Compression Platens Specifications

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