Scientific Cutting Tools (SCT)

Scientific Cutting Tools (SCT) offers carbide drills engineered for industries that demand extreme precision and quality — including aerospace, automotive, and medical manufacturing.

This article focuses on SCT’s carbide drills designed specifically for pre-port operations—such as pilot and positioning holes—and explains the key features that enable precise, stable holemaking performance.

Recommended
Applications for
Scientific Cutting Tools

SCT’s carbide drills are ideal for high-precision production environments in aerospace, automotive, hydraulic/fluid power, and medical sectors,where components must comply with international standards such as AS5202 and SAE J1926.

These drills — used in the pre-port stage (pilot and positioning) — typically feature a 140° self-centering point geometry that ensures accurate hole positioning and prevents wandering at drill entry. In addition, through-coolant (coolant-through) functionality enables smooth chip evacuation and stable performance during continuous production.

Note: Performance may vary depending on tool type, cutting speed, feed rate, coolant type, and machine rigidity.

Key Products from
Scientific Cutting Tools
(SCT)

DFX Drills Series

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Overview

The DFX Drills Series consists of solid carbide drills designed for port machining, including pilot hole formation. These drills are intended for use in combination with porting tools that do not have their own pilot guides.

Featuring a 140° self-centering point geometry, the drills ensure accurate hole positioning and minimize walking at the start of drilling.
Their shorter overall length reduces deflection under cutting forces, providing excellent rigidity and dimensional precision.

The recommended drilling depth is up to approximately three times the drill diameter.

Compatible Materials

Not specified on the official website

Lineup

• 7.01mm（approx. 0.276inch）
• 8.59mm（approx. 0.338inch）
• 9.98mm（approx. 0.393inch）
• 11.56mm（approx. 0.455inch）
• 13.03mm（approx. 0.513inch）
• 17.60mm（approx. 0.693inch）

Roughing Step Drills Series

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Overview

The Roughing Step Drills Series consists of solid carbide drills designed to rough out the initial hole geometry before reaming.
By pre-machining the shape, these drills help reduce the cutting load and wear on the reamer used in the subsequent finishing process.

Each drill can create two different hole diameters in a single operation—one for the threaded portion and another for features such as O-ring seats—eliminating the need for multiple tool changes.

By combining operations that once required multiple tools into a single drill, the Roughing Step Drills Series extends tool life and significantly shortens overall cycle time.

Compatible Materials

Not specified on the official website

Lineup (diameter)

• 6.60mm（approx. 0.260inch）
• 8.20mm（approx. 0.323inch）
• 9.58mm（approx. 0.377inch）
• 11.15mm（approx. 0.439inch）
• 12.62mm（approx. 0.497inch）
• 17.20mm（approx. 0.677inch）

Spotting Drills Series

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Overview

The Spotting Drills Series is a line of solid carbide drills designed to accurately position holes before using larger-diameter drills.By creating a precise starting point, these drills prevent the main drill from wandering off-center during hole entry.

A wide range of point angles is available—82°, 90°, 100°, 120°, and 142°—allowing users to match the spotting drill’s geometry with that of the subsequent drill for maximum positional accuracy.

Each tool is manufactured with a strict ±1° point-angle tolerance, ensuring exceptional precision.
This high level of accuracy minimizes drill walking and reduces the occurrence of defective parts, improving overall machining quality and consistency.

Compatible Materials

Not specified on the official website

Lineup (diameter)

• 3.18mm（approx. 0.125inch）
• 4.76mm（approx. 0.188inch）
• 6.35mm（approx. 0.250inch）
• 7.94mm（approx. 0.313inch）
• 9.53mm（approx. 0.375inch）
• 12.70mm（approx. 0.500inch）
• 15.88mm（approx. 0.625inch）
• 19.05mm（approx. 0.750inch）

For more detailed technical information and product comparisons, visit our special feature on carbide drills for stainless steel.
The page highlights three top manufacturers with proven strengths in stainless steel machining, including in-depth coverage of recommended tools for this demanding material.

After-Sales Support from Scientific Cutting Tools
(SCT)

Scientific Cutting Tools provides an online support form (“Request Support”) on its official website for technical inquiries.

Users can submit details such as tool category, workpiece material, and specific issues, and typically receive a response within 24 hours.

Company Information

Address	220 W. Los Angeles Avenue Simi Valley, CA 93065
Phone Number	+1-800-383-2244
Official Website	https://sct-usa.com/