Guhring

Guhring’s solid carbide drills help reduce downtime caused by tool changes and other production issues, supporting more stable and efficient manufacturing operations.

This article outlines the features and applications of Guhring’s drill lineup.

Recommended
Applications for Guhring

Guhring is ideal for production environments seeking to systematically reduce tooling costs and minimize downtime-related risks.

Its proprietary PVD coating technology forms a hard protective layer over the tool surface, while optimized edge geometries reduce wear and extend tool life. Coolant-through designs promote reliable chip evacuation and help maintain hole quality during continuous machining. As a result, tools require fewer replacements, reducing unplanned line stoppages and contributing to shorter takt times.

Note: Performance may vary depending on the product type and machining conditions, including spindle speed, feed rate, coolant, and machine rigidity.

How to Choose Carbide Drills
from Guhring

As a carbide drills manufacturer with a broad range of high-performance holemaking tools, Guhring offers carbide drill series for different production needs, including high-feed drilling, precision pilot holes, and micro deep-hole machining. The best choice depends on the required drilling depth, positional accuracy, workpiece material, and production volume.

For High-Feed Production Drilling

Recommended Series

RT 100 XF Series

When to Choose This Type

Choose the RT 100 XF Series when productivity and tool life stability are priorities in high-feed drilling. This series is especially suited for production drilling in steel, including ISO P materials, where consistent tool performance and reduced downtime are important.

The series combines Guhring’s proprietary carbide substrate with a nano-FIREX coating to deliver strong wear resistance and toughness. The substrate’s inherent “resharpening effect” helps suppress micro-chipping and reduces the risk of sudden tool breakage during demanding machining conditions.

With 3×D, 5×D, 7×D, and 12×D options, the RT 100 XF Series allows manufacturers to select the drilling depth that fits their application. The 3×D to 7×D tools use a 140° point angle, while the 12×D type uses a 135° point angle for deeper drilling applications.

Suitable Materials

• Carbon and alloy steels, including structural and quenched/tempered grades
• Stainless steels, including austenitic and martensitic grades
• Cast irons, including gray and ductile cast iron
• Non-ferrous metals, such as aluminum alloys
• Nickel and titanium alloys
• Hardened steels

Available Types

• RT 100 XF 3×D, Series 6498
• RT 100 XF 5×D, Series 5498
• RT 100 XF 7×D, Series 5499
• RT 100 XF 12×D, Series 6499

For Precision Pilot Holes and Fine Finishing

Recommended Series

GS 200 G Series

When to Choose This Type

Choose the GS 200 G Series when the application requires high positional accuracy, roundness, and surface finish quality. Its 3-flute design provides excellent centering, making it a practical option for creating precise pilot holes before reaming, tapping, or other secondary processes.

The 150° point angle supports fine finishing operations and helps improve hole quality. By producing accurate pilot holes and reducing defects in later processes, the GS 200 G Series can help lower rework and improve overall part yield.

Suitable Materials

Information not available on the official website.

Available Types

Information not available on the official website.

For Micro-Diameter Deep Holes

Recommended Series

ExclusiveLine Micro-Precision Drills (VA/XL)

When to Choose This Type

Choose the ExclusiveLine Micro-Precision Drills when machining micro-diameter deep holes in high-precision fields such as medical, aerospace, and automotive manufacturing. This series is designed for applications where small hole size, drilling depth, and process stability are all critical.

The drills feature honed cutting edges optimized for small diameters, along with coolant-through designs capable of reaching up to 30×D. These features help suppress chip clogging and thermal damage during deep-hole machining.

The VA variant is designed for difficult materials such as stainless steel and heat-resistant alloys. Guhring’s Perrox coating helps prevent edge welding and supports stable performance, reducing risks such as tool breakage and burr formation when machining expensive materials.

Suitable Materials

• Carbon and alloy steels, including structural and quenched/tempered grades
• Stainless steels, including austenitic and martensitic grades
• Cast irons, including gray and ductile cast iron
• Non-ferrous metals, such as aluminum alloys
• Nickel and titanium alloys
• Hardened steels

Available Types

• ExclusiveLine™ Carbide Micro-Precision Drill 4×D: Ø0.500–3.000 mm, approximately 0.020"–0.118"
• 5×D: Ø1.000–3.000 mm, approximately 0.039"–0.118"
• 7×D: Ø0.500–3.000 mm
• 8×D: Ø1.000–3.000 mm
• 15×D: Ø1.000–3.000 mm
• 20×D: Ø1.000–3.000 mm
• Internal coolant models:
  3×D: Ø0.500–3.000 mm / Ø1.000–3.000 mm
  6×D, 8×D, and 15×D: Ø1.000–3.000 mm

Quick Selection Guide

• For high-feed production drilling: Choose the RT 100 XF Series.
• For steel-focused production drilling: Consider the RT 100 XF Series, especially for ISO P applications.
• For precise pilot holes: Choose the GS 200 G Series.
• For fine finishing and better hole quality: Consider the GS 200 G Series with its 3-flute design and 150° point angle.
• For micro-diameter deep holes: Choose the ExclusiveLine Micro-Precision Drills.
• For deep micro holes in difficult materials: Consider the VA/XL options with coolant-through design and Perrox coating.

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 Guhring

Guhring supports cost reduction across the full tool lifecycle.
Even after a solid carbide drill becomes worn, it can be restored to like-new condition at Guhring’s U.S.-based facilities.

The reconditioning process involves resharpening the tool and reapplying the manufacturer’s original PVD coating.
Since the same production process is used as for new tools, performance loss is minimal.

Authorized distributors handle the service process, offering seamless support from initial purchase through reconditioning—all within the United States.

Company Information

Address	Gühring KG, Herderstraße 50–54, 72458 Albstadt, Germany
Phone Number	+1-800-776-6170 (Guhring, Inc./Brookfield, WI, USA)
Official Website	https://www.guhring.com