The following examples are typical applications, processes, and tolerances, and although they are not actual part drawings, these are indicative of what is possible on UNISIG deep hole drilling machines with proper machine configuration, tooling, and process knowledge.

Drill and contour landing gear actuating cylinders while holding an extreme straightness tolerance in high-strength alloys.

Fuel rails require small straight holes, that won’t fail when under fuel pressure. Gundrilling is capable of achieving holes drilled to these strict tolerances.

A series of holes is drilled in a block of steel for hydraulic fracturing equipment. A heavy workpiece and strict tolerances require capable machines and tools.

Trepan holes at extreme depth-to-diameter ratios in long workpieces without sacrificing accuracy in roundness or wall thickness.

High precision, high volume parts require multiple holes at extreme tolerances, achieved by a 3-spindle gundrilling center with robotic and conveyor automation.

Center Cutting, 30 Degree Helix, RHC/RHS | Premium Sub-Micron Carbide Tolerances: Cutting Dia: +.000 / -.002, Shank Dia: -.0001/.0004 MADE IN THE USA

Deep holes exist in a range of applications, across nearly every industry, each one with its own set of strict requirements and unique challenges, from tight tolerances to tough materials to high production goals.

Drill holes at extreme depth-to-diameter ratios in long workpieces without sacrificing accuracy in roundness or wall thickness.