PRECISION DRILLING
& HOLEMAKING
SOLUTIONS
FOR FIREARM
MACHINING
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)
.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)
.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
.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)
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)
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
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
22mm Caliber Pistol Barrel
Material: 410 Stainless Steel
Speed: 4,000 - 5,000 RPM
Depth of Cut: 5.50 inches
Feed: 40 inches/min
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)
Upper Rail (Option 2)
Material: 7075-T6
RPM: 1,940
Size: ø 1.805
Feed: 15.52 inches/min
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
