Trepanning, Gundrilling, Boring

• American Hollow Boring Co.  - Deep hole drilling, trepanning, honing, machining and saw cutting services.
• American Machine & Gundrilling  - Specialized in deep hole drilling.
• Apperley Honing  - Offers honing service for one off components as well as production batches.
• BC&F Tool Company  - Specializes in small hole diameter gundrilling.
• Betar, Inc.  - Providing complete drilling, honing, machining, and machine building capabilities.
• Brinkman Precision, Inc.  - Services include CNC grinding, match grinding, milling, turning, TIG welding, Swiss style turning, internal heat treating and brazing as well as pressure testing.
• Burdon Gundrills  - Manufactures gundrills of the single flute design for producing precision holes more efficiently.
• Carlson Tool & Manufacturing Corp.  - Providing contract drilling, deep hole drilling, gundrilling and honing.
• Center Line Drilling Inc.  - Providing deep hole drilling, gun drilling, honing.
• CNC Industries, Inc.  - Specializing in high-speed CNC machining, rapid product development, fabrication, and assembly of component parts.
• D&S Machine Service  - Offers fabrication, CNC and manual machining, cutting, burning, forming and welding.
• Davis Machine & Tool, Inc.  - Specializes in deep hole gun-drilling, with the capability to drill holes from .093 inch to 2.0 inch diameter.
• Dearborn Precision Tubular Products, Inc.  - Offering deep hole drilling, trepanning, honing, CNC turning, milling, straightening, splining, centerless grinding, CNC cylindrical grinding.
• Dearborn, Inc.  - Internal machining specialists, provides gundrilling, deephole drilling, honing, trepanning, cnc-milling, cnc-turning, prototype machining, finished machine parts and concentric tubing.
• Deep Hole Specialists  - Deep hole drilling source for gundrilling, trepanning, spade drilling, honing and turning.
• Grover Gundrilling, Inc.  - Precision deep hole drilling and honing specialists, providing gundrilling, honing, and deep hole solutions.
• Hole Specialists Inc.  - Providing gun drilling, deep hole drilling and honing services.
• Hollow Boring Inc.  - Specializes in deep hole drilling services for materials such as ferrous and non-ferrous metals, stainless steel, die steel and alloys.
• Honematic Machine Corporation  - Offering gun drilling long holes in large irregular work pieces from .25 inch to 7 inch in diameter with lengths over 300 inches.
• Jerpbak-Bayless Company  - Custom precision metal machining services including CNC milling, CNC turning, OD grinding, thread grinding and helical milling.
• Laserage Technology Corporation  - Specializes in laser scribing, machining, drilling, welding, and other custom laser job shop services.
• LeFiell Manufacturing Company  - Fabricates critical precision tubular products in support of the commercial airplane, defense and aerospace industries.
• Med-Kas Hydraulics  - Offering deep-hole gun drilling facilities and design and machining of hydraulic manifolds and sub-plates.
• Metal Craft  - Providing CNC turning, Swiss turning, 7 axis grinding, gun drilling and honing, wire EDM and hole popping, laser etching and passivation.
• Mollart  - Gundrilling, deep hole drilling machines and tooling systems.
• Morlin Inc.  - Specializing in deep hole drilling and distributors for Heidenhain CNC controls, digital readouts and encoders.
• Nelson Precision Drilling Co.  - Gun drilling of stainless, alloy, hi-temp nickel alloy materials of varying shapes and sizes.
• Standard Machine Works, Ltd.  - Supplying precision machining and deephole drilling services, specializes in the drilling, boring, honing, and turning of precision tubular products.
• Sterling Gun Drills  - Manufacturer of deep hole drills for production requirements, large and small.
• Technidrill Systems Inc.  - Manufacturer of precision CNC deep hole drilling machines.
• Thompson Gundrilling Inc.  - Offering the drilling of deep precision holes to close tolerances by depths of 10 to 200 times the diameter of the drill in most metals and plastics.
• Trepanning Specialties Inc.  - Gundrilling materials as common as stainless steel to exotic metals such as titanium, as well as non-metallic materials such as wood and plastics.
• Venango Machine Company  - Offering deep hole drilling, gun drilling, flat machining, welding, horizontal boring, surface and edge machining, t-slotting, drilling and tapping.
• Wire Tech EDM, Inc.  - Specializing in wire EDM and EDM hole drilling including large hole drilling and small hole drilling.