| 摘要 |
A roller-cutter drill bit includes a pin, a cone roller cavity of which is sealed with a plate-like gasket, an elastic ring installed between the bearing separator arranged as a flat washer, and the cone roller, at that the plate-like gasket is connected without possibility of motion to the pin. Additionally it includes a separator in which rollers are placed, this is made of composite wear-proof material, with height that corresponds to the height of the roller of the bearing. |
