FIELD: mining.
SUBSTANCE: rolling drilling tool for extraction of material according to the undercutting principle contains cutting surface (12) made concentrically about central M axis and conically diverging to end surface (11) of rolling drilling tool (10) and support housing located on inner side of cutting surface (12) and passing to end surface (11) of the tool. Cutting surface (12) consists of material that is harder than that of support housing, and support housing forms conical ring-shaped rib at least on outer circular wall, and the inner circular wall of rib restricts free space (21) on end surface (11) of the tool. Due to free space and various pairs of materials the tool can be turned automatically.
EFFECT: increasing the service life and operating time of rolling drilling tool.
17 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| METHOD AND DEVICE FOR PROCESSING OF MATERIALS WITH MILLING | 2007 |
|
RU2433265C2 |
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| ROCK DRILLING BIT WITH SLURRY RETRIEVER | 2013 |
|
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| MILLING DEVICE | 2014 |
|
RU2655313C2 |
| DRILL ROLLER BIT | 2005 |
|
RU2300620C1 |
