Spherically Seated Compression Plates


  • Self-alignment of the upper spherically seated plate
  • Ideal for compression testing non-parallel specimens such as finished products
  • Available with 100 mm (3.9 in), 210 mm (8.3 in), and 310 mm (12.2 in) diameters
  • Maximum capacity of 250 kN (55,000 lbf)
  • Hardened faces preserve surface smoothness

Relevant Materials:
Plastics, Metals, Rubber, Lumber, Cement

Relevant Specimens:
Cylinders, Cubes, Cuboids


The advantage of this type of compression plate set, which is comprised of a spherically seated upper compression plate and a fixed lower compression plate, is the ability of the upper spherically seated plate to self-align when contacting the specimen surface. This enables the application of a uniform load to non-parallel specimens such as finished products.

Spherically seated compression plate sets are available with diameters of 100 mm (3.9 in), 210 mm (8.3 in), and 310 mm (12.2 in). The surface hardness of both the upper and lower compression plate is 60 on the Rockwell HRC scale.

The upper plate attaches to a compression and bending loading jig and the bottom plate fits onto the table of the universal tester.

Spherically seated compression plates, which include a compression and bending loading jig in addition to the upper and lower plate set, are also available as kits in some regions. Please contact your local Shimadzu representative for details.

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