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Sterling Gun Drills’ Drills That Can Be Used DM2000 and DM3000 Kits, Directly on the Drilling Site

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Sterling Gun Drills’ Drills That Can Be Used DM2000 and DM3000 Kits, Directly on the Drilling Site Deep Hole Gun Drills and Drilling Systems Contents An introduction to deep hole gun drilling Toolholders A brief background on the history of deep hole gun drills, gun drilling and how the gun drilling machine works ................................................................................ 3 Gun drill components and accessories A variety of toolholding Features of our standard gun drill and accessories for and reduction sleeves gun drill machines ............................................................ 4 for most machines ...........................................................12 Deep hole gun drills and reamers The TWINMASTER® deep hole drill The features and applications for a completely new two flute deep hole drill ....................... 13 A listing of styles and characteristics available. We offer gun drills from stock, or we can make custom drills to meet your specific application......................................... 5 Nose grinds and contours The best combination of nose grind and contour for Ordering and your application ............................................................... 6 resharpening information ......................................................................14 The DM-41/42 regrind fixture A manual fixture for both gun Spraymist kits drills and half round drills for surface or tool and cutter grinding machines .......................................... 7 The DM-43 regrinding system A self contained machine for gun drills and half round A description of Sterling Gun Drills’ drills that can be used DM2000 and DM3000 kits, directly on the drilling site ............................................... 8 explaining the principle of their operation and application .......................................................................15 The deep hole drilling system A listing of components for deep and precision hole drilling on standard machines ......................................... 9 Tear out and save SPECIAL SECTION: The drilling system operation Set up and operation procedures ...................................10 Speeds and Feeds A two page chart with speed and feed guidelines for most materials, rated by hardness and available Gun Drills and Half round drills operating pressure. This chart covers deep hole gun drills and machines, half round drills, and TWINMAS- TER® drills. Also included are handy oil pressure, GPM, A description of Gun drills and half round drills, specifi- and unsupported drill length guide- cations, and ordering information ..................................11 lines ............................................................................. 16,17 940 Water Street, N. Bennington, VT 05257 • TOLL FREE: 888-338-1049 • Fax: 802-442-6225 www.sterlinggundrills.com • email: [email protected] An Introduction to Gun Drilling Deep hole drilling was first developed for the aligned to absorb cutting torque, sagging, and the whipping manufacturing of firearms, hence the name gun drilling. associated with high RPMs. Any size, feature, or length Originally a time-consuming and costly process, today’s configuration can be obtained from .053” to 1.625” technological advances make it a highly efficient diameter. manufacturing operation in all metal cutting industries The drill is positioned and held in the spindle nose, including automotive, aircraft and aerospace, then guided into the workpiece through a prestarted construction, medical, mold and tool and die, hole or guide bushing that prevents vibration and hydraulics, pneumatics, and more. ensures accuracy. Gun drill cutting edges form thin, Gun drilling is an ideal solution for most deep curled chips that are carried away from the bore by and precision drilling projects. This high precision high pressure lubricant. The off-center design of the operation produces accurate, repeatable holes, with cutting edges creates pressure within the bore that is excellent surface finishes. Gun drills hold location to precise carried by pads behind the drill tip. The coolant that tolerances, are sized to exact specifications, produce burr- flushes the chips also lubricates these pads, which free holes, and can be formed to produce specific shapes burnish the surface and develop the fine finish for in blind holes with minimal machine adaptation. which gun drilling is known. As a leading manufacturer of deep hole drills, Sterling Gun Drills continues to build its reputation for The gundrilling machine personal service and practical solutions for production Specifically designed to provide the optimum requirements, large and small. We match the correct conditions for operating the gun drill, the gundrilling drill, whether standard or specialized, to the intended machine is equipped with a high pressure pump that material and application. All of our customers can delivers lubricant to the rear of the drill. The drill can depend on us for prompt, efficient response and be driven by the spindle or held stationary quality products that attest to our expertise in if the workpiece is being rotated. During drilling, engineering and manufacturing. As part of our advancement can be either by drill or workpiece scrupulous inspection procedure, we test 100% of movement. our drills of .375” diameter and under for assembly The gun drill is supported by anti-whip devices integrity, leakage, and specified oil flow. along the shank length and at the rear of the chip box. If you need assistance in planning or solving The chip box contains a chip deflector and a front end technical problems, our staff is on hand to provide bushing which guides the drill into the workpiece. support. All our services are provided with one goal The chip box also contains escaping chips and in mind: To supply the finest gun drills and the best service lubricant, which are separated and filtered. Gundrilling at the most reasonable cost. machines come in many variations from single spindle manual models to CNC units with multiple spindles of The gun drill and its function different designs. They can be integrated into transfer lines A typical gun drill consists of three parts: a carbide or be part of a machining or turning center. Gun drilling tip, a heat treated alloy shank, and a steel driver. All is also becoming popular as a retrofit package for both are typically silver brazed together, and are designed conventional and CNC machines. to allow coolant to pass through its entire length. The shank must be properly formed, heat treated, and Housing Deep hole gun drill Spindle drive Whip guide/chip deflector Feed drive Chip box High pressure pump Workpiece Guide bushing 940 Water Street, N. Bennington, VT 05257 • TOLL FREE: 888-338-1049 • Fax: 802-442-6225 3 www.sterlinggundrills.com • email: [email protected] Gun Drill Components Driver Shank Drivers are manufactured to industry standards as well as any Sterling Gun Drills shanks are manufactured specified diameter, length, or feature, such as flats, “O” ring groove, from aircraft grade alloy steel tubing that and ID or OD threads. Standard drivers have an is formed, heat treated, and trued to exacting undercut to .750” diameter and two “whistle notch” flats specifications. above. Drill Tip Single flute solid carbide drill tips are supplied in all diameters from .078” to 1.625” in a number of styles. Sterling Gun Drills’ standard tip has a round or kidney oil hole. Twin hole tips or other variations are available. Our smallest drills (.045” to .160”) can be ordered with a solid carbide shank/tip. Standard pad form (contour) is the R-1 low-land, non-micable style. Other styles are available as conditions warrant. Diameter (inches) OAL Driver D//A Length Retipping, reconditioning, resharpening, 0.045” - 0.1249” A 0.500” 1.50” resizing, and surface coatings are available. 0.1250” - 0.5000” B 0.750” 2.75” Standard drills can be ordered by just specifying drill diameter and overall length. 0.5001” - 0.7500” C 1.000” 2.75” All will be supplied with R-1 (low land) 0.7501” - 1.0000” D 1.250” 2.75” O O contour and N-8 (30 x 20 ) nose grind,* 1.0001” - 1.375” E 1.500” 2.75” either facet or sweep grind. 1.3751” - 1.625” F 2.000” 2.75” * 40° x 30° in solid flute Accessories Sterling Gun Drills supplies a complete selection of accessories for deep hole drilling machines. A) Pump filters: 5 and 15 micron filter elements for the Mega Flow deep hole drilling systems. Removes particles too fine to be 7 25 trapped by filter bags (5” OD x 12 /16” OAL x /32”). B) Filter bags: Upper and lower filter bags for the Mega Flow deep hole drilling systems. Traps larger chips and prevents then from returning into tank. Upper bag supplied with rope. C) Chip deflectors: Metal faced polypropylene chip flippers keep oil and chips in the chip box (sizes from .078” to 2.000”). D) Anti-whip guides: Molded vinyl deep hole drilling liners pro- vide relief from whipping and bowing, permitting higher speeds without vibration (sizes from .078” to 2.000”). 4 940 Water Street, N. Bennington, VT 05257 • TOLL FREE: 888-338-1049 • Fax: 802-442-6225 www.sterlinggundrills.com • email: [email protected] Deep Hole Gun Drill Styles Single Flute Gun Drills A round or kidney oil hole is Sterling Gun Drills available from .3030” to 1.500”. Twin hole variations of standard, and are available from stock in diameters similar construction are available upon request. from .1250 to to .3020”. Round oil hole styles are Gun Reamers Round tube reamer and custom drill configurations are available upon request. Contact Sterling Gun Drills’ technical department
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