Find a Machine by Process Type

UNISIG machines are capable of utilizing a variety of tooling processes to achieve part and production requirements. Find your machine based on deep hole drilling tooling process.

Gun drilling is characterized by hole diameters between 1 – 50 mm [0.04 – 2.00 in] and uses internal coolant and external chip exhaust to handle deep holes with precision.

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BTA drills use external coolant and internal chip exhaust to drill larger diameter holes at a faster feed rate. Hole diameters between 20 – 630 [0.80 – 24.8 in] are common.

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Ejector drilling is a dual-tube alternative to BTA drilling in limited applications. Typical ejector drills range from 20 – 200 mm [0.08 – 7.87 in] in diameter.

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Counterboring is used to enlarge existing holes, and can pilot off of either the finished bore for diameter requirements, or pre-bore for concentricity.

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Pull counter boring enlarges an existing hole as it is pulled back through the workpiece on a tensioned boring bar for maximum straightness.

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Trepanning drills a hole into a solid bar, leaving a solid core in the middle, and enabling larger holes to be drilled with the same relative power.

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Skiving and roller burnishing is a two-process, one-pass finishing operation used to achieve surface finish requirements in applications such as hydraulic cylinders.

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Bottom forming finishes off the base of a hole using specialized form tools. Bottom forming profiles include radius, step, or flat bottom.

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Bottle boring utilizes actuators which extend and retract within the hole to create an internal profile, often in aerospace landing gear applications.

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Reaming is part of the rifle barrel blank manufacturing process, following gundrilling, and prior to rifling, for roundness and surface finish.

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Rifling is performed on a servo-controlled machine for precision rifle grooves in a barrel blank.

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Milling and machining complements deep hole drilling capabilities for improved profitability and throughput on select machines.

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Submit Application

If you’re not sure, or your tooling process is not listed here, please submit your application for review.