| 摘要 |
mining, particularly, mining tools applicable in rock cutting. SUBSTANCE: device has a bushing made to provide for installation of tooth in holder hole. Bushing has a through hole in which cutting tooth is installed for rotation and body with a collar which serves to prevent axial motion of bushing relative to tooth holder. Provided in body and/or in collar is undercutting zone to reduce maximum load arising between body and collar. Design of tooth holder and bushing allows fixing of bushing in axial direction relative to body part of tooth holder by tight fit so that bushing may be easily removed from this body part. EFFECT: prolonged service life of mining tool. 7 cl, 14 dwg
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