Photo Record
Images
Metadata
Title |
MINE, Miscellaneous, Drill Bits |
Date |
1939-1953 |
Description |
Series of photographs of drill bits. 259-1: Close up of drill bits with the following labels: "Ingersol M.A.15.," Ingersol M.A.25.," "Ingersol Butterfly," "Leyner," "Shaw," and "Waugh." 259-2: Two rows of nine drill bits in each row. The top row is labeled "Old" and the bottom row is labeled "New," 1939. 259-3: Tungsten carbide bits 1-3/8", 1953. Photograph taken by Black Hills Studios, Inc. Sharp Bits May 1953, Vol. 4, No. 4 pg. 2 top "New, High-speed detachable bits -- shown above are the 1 3/8 inch diamenter tungsten carbide bits that now are used exclusively in underground drilling operations. These bits which cost about 10 dollars each, have succeeded one-use detachable bits and forged drill steel. The cutting edges are the four inserts on the face of the bits. They are tungsten carbide, an extremely hard, tough alloy. some 2 1/2 inch carbide bits are also used, primarily in drilling burn holes in development drifts." 259-5: Close up of many drill bits creating a sort of textured image. 259-8: Photograph of several drill bits and other tools, 1953. Information on note found in Drill Bits file: 1953, the following are weights of drills, etc. D12 - Hand Feed Drifter 24 inch change 157 lbs.; 5 Foot Machine Post (complete) 83 lbs.; 20 Inch Arm for Machine Post 28-1/2 lbs.; Saddle for Arm 19-1/4 lbs.; Jack Bar and Pair of Shoes 15 lbs.; H10 Jack Leg Drill 63 lbs.; 3 Foot Aluminum Jack Leg 30-1/4 lbs. from Tom Stone in the Rock Drill Repair Shop |
Collection |
Homestake Mining Company Collection |
Object Name |
Series, Archival |
Catalog Number |
HMCC 259 |
Print size |
Please See Metadata for Print Sizes |
Search Terms |
1930s 1950s Black Hills Studios Drilling Homestake Mining Company Mining Mining Equipment Tools |