The DIAMAR nk is a universal measuring unit for measuring outside diameters (0 mm to 225 mm/0 in to 8.86 in) and inside diameters (5 mm to 225 mm/.197 in to 8.86 in), for testing the dimension over balls on internal and external gears, and for checking heights.

An extensive range of accessories gives the DIAMAR nk the versatility required for a whole range of measuring tasks, e.g. determining the concentricity of outside to inside diameters or two outside diameters, the plane-parallelism of end faces, or the thickness of parts, or for checking groove diameters.

Dial indicators, dial comparators, or probes with a clamping shaft diameter of 8 mm or 3/8 in can be used for the measuring instruments. The measuring force can be adjusted via springs.