| 摘要 |
769,587. Drilling. ASPLUND, A. J. A., [trading as MASKINFIRMA R. L. CARLSTEDT]. Oct. 14, 1954 [Oct. 15, 1953], No. 29603/54. Class 83 (3). In a drilling machine, a device for supplying a coolant to the tool (not shown) comprises an axially extending channel 36 traversed by the drilling-tool and a shielding member 64 preventing a supply of coolant through a conduit 70 from impinging radially on the tool. The tool passes through an adjustable guide collet 56, a guide bore 66 and a passage 44 which supports and guides the cutting head as it enters the work 14. The work, such as a rifle-barrel, is located in a support 30 and a washer 50 prevents coolant escape. Coolant and chips are returned through a hollow bore in the tool. |
