PRECISION DRILLING
& HOLEMAKING
SOLUTIONS
FOR FIREARM
MACHINING

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Manufacturing accuracy and precision are crucial to the performance and reliability required of a firearm. Gun manufacturers need to ensure they are working with the highest quality cutting tools that are optimized for each application, and capable of producing the complex geometries and tolerances driven by the firearms industry.

Star Cutter has years of experience in develop optimized hole making and drilling tools for the production of precision gun parts including barrels, upper rails, firing pin holes, and bolt action components. We have expertise in optimizing tools for the machining of 4140 and 4150V steels, 410 & 416 stainless steels, Stellite, and 7075 aluminum for a wide range of firearm components.

Drilling and Holemaking Solutions

Pistol Barrels Solid Carbide Gundrills Drilling and optimizing TIR for inner diameter
Solid Carbide Deep Hole Twist Drill Drilling and optimizing cycle time for inner diameter
Reamers Reaming bore to tight part print tolerance requirements, minimizing or eliminating honing
Rifle and Shotgun Barrels Gundrills Drilling out inner diameter of barrel
Push and Pull Reamers Boring inner diameter barrel to size
Rifling Buttons Cold forming rifling grooves and resizing bore inside barrel
Upper Rail (Option 1) Single Flute Gundrill Roughing out inner diameter of part for reaming operation to follow
SRT Reamer Ream non-critical bore to part print requirements
End Mill Finish ciritcal bore by circle interpolation using an End Mill
Upper Rail (Option 2) Core Drill Roughing out inner diameter of part for reaming operation to follow
Reamer Ream critical and non-critical bores from one side
Firing Pin Hole Small Diameter Solid Carbide Twist Drill Drilling of pilot bore
Solid Carbide Twist Drill Drilling of main inner diameter of part
Form Solid Carbide Gundrill Machining internal chamfer and drilling out small diameter bore for the firing pin break through
Bolt Action Components Solid Carbide Gundrill Drilling and optimizing TIR for inner diameter
Single Flute Solid Carbide Chamfering Reamer Reaming inner diameter to size and improving the surface finish, when required

Case Studies

.22 Caliber Rifle Barrel

Material: 4140; 4150V
Speed: 4,400 - 4,800 RPM
Feed: 2.75 - 3.75 inches/min
Regrinds: 5 - 10
Tool life: 200 - 400 barrels (depending on material quality)

Single Flute Gundrills 2017 Flipped

.22 Caliber Rifle Barrel

Material: 4140; 4150V
Speed: 5,000 - 5,500 RPM
Feed: 7 - 10 inches/min
Tool life: 200 - 500 barrels (depending on material quality)

High Performance Single Flute Gundrill

.22 Caliber Rifle Barrel

Material: 416 Stainless Steel
Speed: 5,000 - 5,500 RPM
Feed: 2.75 - 3.75 inches/min
Tool life: 200 - 300 barrels (depending on material quality)
Double Contour Specialty Design for Excellent Part TIR Control

6M5A8637 Processed

.22 Caliber Rifle Barrel

Material: 416 Stainless Steel
Speed: 5,000 - 5,500 RPM
Feed: 7 -10 inches/min
Tool life: 500 - 600+ barrels (depending on material quality)

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5.56 Caliber Rifle Barrel

Material: 4150V
Speed: 800 - 1000 RPM
Feed: 4 - 8 inches/min
Length of Cut: 18 inches
Tool life: 2,000 - 4,000 barrels (depending on material quality)

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Firing Pin Hole

First Pass
Material: 158 Steel
Diameter: 4.128 mm
Speed: 4,750 - 5,250 RPM
Feed: 1.90 - 3.156 inches/min
Tool life: 275 - 325 parts

Twist Drill Pilot Drill No Shadow

Firing Pin Hole

Second Pass
Material: 158 Steel
Diameter: 4.120/1.586 mm
Speed: 4,750 - 5,250 RPM
Feed: 1.00 - 1.60 inches/min
Tool life: 475 - 525 parts

Solid Carbide Flute Gundrill

22mm Caliber Pistol Barrel

Material: 410 Stainless Steel
Speed: 4,000 - 5,000 RPM
Depth of Cut: 5.50 inches
Feed: 40 inches/min

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9mm Caliber Pistol Barrel

Material: 4140
Speed: 3,000 RPM
Feed: 3.50 inches/min
Depth of Cut: 3.50 inches
Tool Life: 725 - 775 barrels (depending on material quality)

Solid Carbide Gundrill 9mm

Upper Rail (Option 2)

Material: 7075-T6
RPM: 1,940
Size: ø 1.805
Feed: 15.52 inches/min

4 Flute

Upper Rail (Option 2)

Material: 7075-T6
Size: ø 30.340
RPM: 1,118
IPM: 35.25
Positional Errors: ≤ 0.0003” (design change implemented tool in production.)
Tool life: ≥ 3,000 parts

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Comprehensive Machine Tool Supply & Services

Contact Star SU today to learn more about our comprehensive gear machine tool supply and services from industry experts. You can also browse our online catalog of Gear Manufacturing and Tool Grinding machines, our extensive line of Cutting Tools, or learn about our Complete Tool Services.

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