The Impactmill accurately notches plastic and non-metallic materials in accordance with ASTM D256 or ISO 180.  The totally enclosed ½ HP motor rotates a precision ground, single tooth cutter at 1000 RPM.  One or more prepared .500” wide blanks are clamped in the Impactmill’s holding fixture; a rotating cutter notches the specimens as the handwheel is cranked to move the fixture through the cutter’s path.  A micrometer control is used to raise and lower the notching cutter on the Impactmill.  To check the depth of the notch, a micrometer with a knife edge is mounted on the unit.  It is used to accurately measure the critical distance between the tip of the “V” notch and the back of the izod or charpy impact bar.  As with all Tensilkut equipment, the Impactmill is designed for location in the laboratory, and can be operated by technicians with no machining experience.

To prepare the blanks which the Impactmill notches, either the Tensilsaw or the Tensilkut machine can be used.

Replacement cutters for the Impactmill are stocked in our office for immediate shipment; credit cards are accepted for purchase of these cutters.

These are typical samples of fiber based material, with the bars having been cut with the direction of the fiber, and at a 90 degree angle, prior to notching.  Such samples are typically stacked together with a backing blank, and all notched at once.

This is a plexiglass impact specimen notched on the Impactmill in accordance with ASTM D256.