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| HARDNESS AND SCRATCH ANALYSIS—CONCLUDED | ||
|---|---|---|
| Schmidt hardness | Twin Cities Mining Research Center W. A. Olsson, R. E. Thill, 725-4580 | Soil test Schmidt hardness hammer and Shore scleroscope hardness tester for determining the hardness properties of a material. |
| Scratch analysis | Twin Cities Mining Research Center Robert J. Willard, 7254573 | Hilger and Watts fine-scratch microscope, model TM-52, for use in measuring widths and depth (in inches) of scratches on rock and mineral materials. Moderate experience in scratch measurements, can provide scratch analyses on a limited number of samples of any solid, translucent or opaque material. |
| Shore hardness | Denver Mining Research Center R. Gerlick, 234-3765 | Shore hardness tester to determine hardness of rock and other materials. |
| Rock drilling and cutting, core preparation | Denver Mining Research Center H. C. Farley, E. B. Wimer, 234-3755 | Trained staff and equipment available to take core from small samples and prepare it for testing, cutting, grinding, etc. |
| Rock cutting and handling | Twin Cities Mining Research Center R. L. Schmidt, 725-3455 | Trained staff and equipment are available to conduct small- or large-scale experiments in the laboratory or field. Instrument drilling equipment includes a 2-boom jumbo with drifters, airleg drills, a diesel-powered diamond drill, and a truck-mounted rotary drill. Small- and large-scale linear rock-cutting apparatus are also available with thrust capabilities to 14 tons. The laboratory is equipped with service equipment for handling up to 7-ton rock blocks. |
