WIDIA

Stainless steel and other hard-to-cut materials—commonly used in automotive and aerospace components—pose significant machining challenges.Short tool life and inconsistent dimensional accuracy are major factors that drive up production costs.

This article introduces three carbide drill series from WIDIA and explores how each product addresses these challenges through distinct design and material technologies.

Source: WIDIA Official Website
https://www.widia.com/de/en/home.html

Recommended
Applications for WIDIA

WIDIA’s carbide drills are ideal for manufacturers aiming to reduce tool change frequency and per-part costs when drilling stainless steel, where tool wear is typically severe.

The difficulty of machining stainless steel lies in its inherent “stickiness” and the high heat generated during cutting.
WIDIA tackles these issues through specially engineered coatings that resist heat and wear, and cutting-edge geometries that promote smooth chip evacuation—reducing machining instability and prolonging tool life.

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

How to Choose Carbide Drills from WIDIA

As a carbide drills manufacturer with solid carbide drill options for general-purpose, unstable, and deep-hole applications, WIDIA offers drill series designed for different production challenges. The right choice depends on the workpiece material, drilling depth, hole stability requirements, and whether the process needs one versatile tool or an application-specific drill.

For Multi-Material General-Purpose Drilling

Source: WIDIA Official Website
https://www.widia.com/de/en/products/fam.varidrill-5-x-d-vds202a-vds402a-a-shank.100006849.html?pdpQuery=%3Arelevance%3AobsoleteFacet%3Afalse%3AallCategoriesWIDIA%3A24064245%3AallCategoriesWIDIA%3A46993284

Recommended Series

VariDrill VDS Series

When to Choose This Type

Choose the VariDrill VDS Series when one carbide drill needs to handle a wide range of materials, including steel, stainless steel, cast iron, non-ferrous metals, and hard-to-cut materials. This series is suitable for general-purpose drilling environments where material types vary and tool management needs to stay simple.

By replacing multiple material-specific drills with one versatile tool, the VariDrill VDS Series can help reduce drill inventory and simplify tool selection on the shop floor.

Suitable Materials

• Steel
• Stainless steel
• Cast iron
• Non-ferrous metals
• Hard-to-cut materials

Available Types

• 3×D
• 5×D
• 8×D

For Angled Surfaces and Intersecting Holes

Source: WIDIA Official Website
https://www.widia.com/de/en/products/fam.tds412a-a-shank-wk15pd-5-x-d.100149413.html?pdpQuery=%3Arelevance%3AobsoleteFacet%3Afalse%3AallCategoriesWIDIA%3A24064245%3AallCategoriesWIDIA%3A46993286

Recommended Series

TOP DRILL S Series

When to Choose This Type

Choose the TOP DRILL S Series when drilling conditions are unstable, such as angled surfaces, cross holes, or intersecting holes where the drill tip may slip or experience high cutting stress. This series is designed to maintain stability and reduce deflection in applications where hole deviation can become a serious issue.

The series is available in types optimized for different material groups, including one for steel and cast iron and another for stainless steel. Each type uses cutting-edge geometry and coatings designed to match the machining behavior of the target material.

By helping reduce defective parts and supporting stable production, TOP DRILL S is a practical option for continuous manufacturing processes that require reliable drilling performance under difficult entry or exit conditions.

Suitable Materials

• Steel
• Stainless steel
• Hard-to-cut materials

Available Types

• 3×D
• 5×D
• 8×D

For Deep-Hole Drilling up to 12×D

Source: WIDIA Official Website
https://www.widia.com/dk/en/products/fam.top-drill-s-12-x-d-tds504a-a-shank.100007174.html?pdpQuery=%3Arelevance%3AobsoleteFacet%3Afalse%3AallCategoriesWIDIA%3A24064245%3AallCategoriesWIDIA%3A46993290

Recommended Series

TOP DRILL S+ Series

When to Choose This Type

Choose the TOP DRILL S+ Series when the application requires deep-hole drilling up to 12×D. This series is designed for operations where hole straightness, runout control, and drilling stability are especially important over longer depths.

The drill features a four-margin design that supports the drill body along the hole wall. Compared with standard two-margin drills, this structure provides stronger guidance, helping minimize runout and maintain straight, precise holes.

In many cases, the TOP DRILL S+ can eliminate the need for a pilot hole before deep drilling. This can reduce setup time, shorten tool-change time, and improve overall drilling productivity.

Suitable Materials

• Steel
• Stainless steel
• Cast iron

Available Types

• 12×D

Quick Selection Guide

• For multi-material general-purpose drilling: Choose the VariDrill VDS Series.
• For reducing tool inventory across different materials: Consider VariDrill VDS as a versatile one-tool option.
• For angled surfaces or intersecting holes: Choose the TOP DRILL S Series.
• For unstable drilling conditions where hole deviation is a concern: Consider TOP DRILL S for improved stability and reduced deflection.
• For steel, cast iron, or stainless steel production: Select the TOP DRILL S type that matches the target material group.
• For deep-hole drilling up to 12×D: Choose the TOP DRILL S+ Series.
• For deep holes where runout and straightness matter: Consider TOP DRILL S+ with its four-margin design.
• For reducing setup time in deep-hole applications: TOP DRILL S+ may help eliminate the need for a pilot hole in many cases.

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 WIDIA

WIDIA offers regrinding and recoating services for used carbide drills.
Instead of discarding worn tools, customers can have them restored for continued use—significantly reducing long-term costs compared to repeatedly purchasing new tools.

Each tool is reconditioned by WIDIA’s skilled technicians, restoring its cutting performance to near-new condition for reliable, consistent machining results.

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