# Solid Carbide Drills: Top 5 Applications Calculations

Solid carbide and end-milling are vital CNC applications. Strength and heat resistance are solid carbide’s two essential advantages. It’s uniquely suited for use on difficult-to-machine metals. Whether you’re working with solid carbide drills or end-milling equipment, it’s critical to have correct calculations. This brief guide introduces some applications and calculations used in solid carbide drilling and end-milling.

#### Calculations for End Milling

Proper calculations are critical to the end-milling process. Speed, feed and rate are among the most common formulas. We measure speed in rotations per minute, based on tool diameter and surface feet per minute: RPM = (SFM * 12) / (D * pi). Another is the cutting feed-in inches per minute, where FPT stands for feed per tool and Z represents the cutter’s number of teeth: IPR = FPT * Z. Finally, the feed rate in inches per minute comes from multiplying the feed and speed calculations together: IPM = IPR * RPM.

Besides these basic formulas, you can find some other excellent end-milling calculators online. For instance, Kennametal offers several engineering calculations for many metalworking applications. The Kennametal calculator section includes several essential end-milling calculators:

• Ball nose surface finish
• Force, torque and power
• G-spec balance formula
• Helical interpolation
• KM indexable torque and power
• KM solid end-mill torque and horsepower

#### All the Way To Z-Axis Milling

Also known as CNC plunge milling, Z-axis milling cuts material at the end of the tool instead of the outer edges. Similar to end-milling, this technique plunges the end-mill flute inside the block of material instead of moving it around the edges. This method is ideal for rough milling, especially with complex or free-form shapes. Z-axis milling also minimizes vibration inside the machine, so it’s optimal for deep cavity machining applications such as mold- and cavity-making. Finally, this technique works well on hard-to-machine materials such as titanium.

#### Top 5 Carbide Drilling Applications

Solid carbide tools work best with high-quality tool holders and equipment. Their drill bits are strong and heat-resistant, but they also tend to be brittle. Precision machines are ideal for getting the most out of solid carbide. These drills deliver stellar performance in several critical scenarios:

• Nickel-based super-alloys such as Hastelloy and Waspaloy
• Refractory metals, including tungsten and tantalum
• High-volume drilling operations
• Deep hole drilling applications
• Close tolerance holemaking

Creating complex sub-assemblies with composite materials is a common application in aerospace manufacturing. Solid carbide drills and end-mills work well with composites containing carbon fiber. These sub-assemblies may also include tantalum, titanium, tungsten or titanium alloys, which can be difficult to machine. Solid carbide’s durability is a plus for high-volume and deep hole drilling. Its brittleness also leads to increased precision, which is essential when you’re dealing with close tolerance holemaking.

#### Solid Carbide’s Many Benefits

Solid carbide tools offer many benefits in metalworking operations. They’re the tools of choice for high-volume drilling, working with hard-to-machine metals and other applications where precision, durability and heat resistance are critical. Partnering with a trusted machine tools vendor ensures that you source the equipment you need for high-quality, cost-effective production.

Share via: