Crown SM-5 f 93 is designed for rotary and rotary-percussion drilling the bottom hole cleaning cleaning liquid in such species as: limestone, clay and sandy shales. Structurally, the crown is a cylinder, one end of which is threaded for connection with the core pipe, and at the other end of the pipe is fixed carbide inserts.
Body material crowns - steel 20
The solid alloy material - VK8
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