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Industrial Services

Dadson 1-1/2” Diameter x42” long Gun Drill Machine Dadson 1-1/2” Diameter x42” long Gun Drill Machine Typical fixturing application of a gun-drilled shaft (in this case an axle) Our DS-1242-DL Dadson Gun Drill machine with a 1-1/2” X 42” capacity is available for projects requiring deep hole drilling in round stock. We routinely drill holes in the 9/16 to 1-1/4 range thru 4340-alloy steel, primarily to reduce rotating shaft weight. This process creates an extremely accurate size and finish control.Round stock can be Gun Drilled with work pieces being up to 42” long. When drilling holes up to 1-1/8”diameter length, a whip guide is required and reduces the maximum length to 39”. In all cases, the work piece must be drilled as the first machining operation, and subsequent machining operations should be trued from the gun drilled hole. A gun-drilled hole on this type of machine is very straight, but does not necessarily follow a path concentric with the stock outside diameter.


DEEP HOLE HONING Subsequent honing operations (if required) can be performed on our Sunnen ST-2000 tube honing machine. This machine has a 78” stroke capacity and can accommodate work pieces with diameters up to 12”. Typically, a gun-drilled bore has a very good finish. Depending on the surface finish requirements, an optional honing operation can be added after drilling. Ocassionaly, tool marks can be left in the bore and require a honing process to Sunnen ST- remove these imperfections. 2000 Hone TYPICAL GUN DRILLED PARTS ALUMINUM HOLLOW BAR PRODUCED FROM 2-3/4 GUN DRILLED AXLE FORGING 4340 1” DIA. 33” LONG GUN DRILLED PANTERA REPLACEMENT AXLE 9/16” GUN DRILLED HOLE 7075 ALUMINUM 1-1/4 HOLE 34” LONG