| 摘要 |
A button assembly for a rotary rock cutter utilized in the penetration of rock strata, especially subterranean strata, having a highly abrasion resistant insert, such as tungsten carbide. The insert is supported by a button having a high abrasion resistance and a transverse significantly higher rupture strength than tungsten carbide. The button penetrates rock strata while continually supporting the insert. The button assembly is fixedly secured to a rotary rock cutter and may be secured in such a manner as to provide a circumferentially extending disc cutting surface.
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