Cobalt Steel Cutters | McMaster-Carr

With better heat and wear resistance than high-speed steel, these cobalt steel end mills can run at higher speeds and provide better performance on hard material, such as cast iron, hardened steel, titanium, and tool steel.

Roughing Cobalt Steel Square End Mills

Serrations along the cutting edge act as chip breakers, so these end mills can remove large amounts of material at high speeds.

Roughing Cobalt Steel Square End
Mills for Aluminum, Brass, and Bronze

A higher helix angle means these end mills clear more chips than other roughing cobalt steel end mills, making them better for milling aluminum, brass, and bronze. Serrations along the cutting edge act as chip breakers, so they can remove large amounts of material at high speeds.

Cobalt Steel Square End Mills with Two Milling Ends

When one end wears out, switch to the opposite end for two times the life of a standard cobalt steel end mill. With better heat and wear resistance than high-speed steel, these cobalt steel end mills can run at higher speeds and provide better performance on hard material, such as cast iron, hardened steel, titanium, and tool steel.

Cobalt Steel Dovetail End Mills

With better heat and wear resistance than high-speed steel, these cobalt steel dovetail cutters run at higher speeds and provide better performance on hard material. Use them to create dovetail slots for connecting two components with a sliding fit.

Cobalt Steel Ball End Mills with Two Milling Ends

Cobalt Steel Straight-Tooth Keyseat End Mills

With better heat and wear resistance than high-speed steel, these cobalt steel keyseat cutters can run at higher speeds and provide better performance on hard material. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling.

Cobalt Steel Corner-Rounding End Mills

With better heat and wear resistance than high-speed steel, these cobalt steel end mills run at higher speeds and provide better performance on hard material. They have scooped corners for rounding the sharp edges of your workpiece.

Cobalt Steel Rounded-Edge Square End Mills

Made of cobalt steel, these end mills have good heat and wear resistance, so they can run at high speeds in hard material. Often used for slotting and pocketing cuts in mold and die making, they have a 90° profile and rounded corners, which reduce flute breakage and chipping.

Cobalt Steel Drill/Mill End Mills

Made of cobalt steel, these end mills have good heat and wear resistance, so they can run at high speeds in hard material. A 90° pointed tip allows them to be used for drilling as well as for slotting, profiling, chamfering, and spotting cuts.

Inch Size Hollow-Core Cutters for Magnetic-Base Drills

Use these inch size cutters with magnetic-base drills.Also known as annular cutters.

Drill Bits

Cobalt Steel Drill Bits

Short-Flute Cobalt Steel Drill Bits

The short flutes on these jobbers'-length bits provide increased rigidity for drilling straighter holes.

Short-Length Cobalt Steel Drill Bits

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits.

Short-Flute Extended-Length Cobalt Steel Drill Bits

The short flutes provide increased rigidity for drilling straighter holes than standard extended-length drill bits.

Extended-Length Cobalt Steel Drill Bits

Chip-Clearing Cobalt Steel Drill Bits

The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow.

Cobalt Steel Morse Taper-Shank Drill Bits

With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life.

Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bits

With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life.

Cobalt Steel 3/4" Diameter Reduced-Shank Drill Bits

With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life.

Cobalt Steel Hex-Shank Drill Bits

In addition to resisting heat and wear better than high-speed steel drill bits, these can also run up to 25% faster and have a longer tool life. Insert them into power screwdrivers, impact drivers, and other tools that accept hex shanks.

Cobalt Steel Drill Bits for Stainless Steel and Nickel

Cobalt steel bits are heat resistant and maintain their sharp edges when drilling hard material. They are for use in both hand-held drilling and machine-tool applications.

Cobalt Steel Hole-Starting Drill Bits

Cobalt steel bits are heat resistant and maintain their sharp edges when drilling hard material. They are for use in both hand-held drilling and machine-tool applications.

Cobalt Steel Left-Hand Drill Bits

With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life.

General Purpose Drill Bit Sets

Cobalt Steel Drill Bit Sets

Short-Flute Cobalt Steel Drill Bit Sets

The short flutes on these jobbers'-length bits provide increased rigidity for drilling straighter holes.

Short-Length Cobalt Steel Drill Bit Sets

Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits.

Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bit Sets

With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life.

Countersinks

Cobalt Steel Countersinks for Screws

More heat and abrasion resistant than high-speed steel, cobalt steel has better performance on hard-to-machine materials.

Cobalt Steel Countersinks for Rivets

More heat and abrasion resistant than high-speed steel for better performance on hard-to-machine materials.

Cobalt Steel Countersinks for Lathe Centers

With more heat and abrasion resistance than high-speed steel countersinks, these have better performance on hard-to-machine materials.

Cobalt Steel Vibration-Resistant Through-Hole
Countersinks with Two Countersinking Ends for Screws

Cobalt Steel Vibration-Resistant
Through-Hole Countersinks for Screws

Cobalt Steel Vibration-Resistant
Through-Hole Countersinks with Two
Countersinking Ends for Lathe Centers

Cobalt Steel Vibration-Resistant
Through-Hole Countersinks for Lathe Centers

Internal Thread Cutting

Long-Reach Chip-Clearing Taps for Through Holes

Clear chips while tapping deep and hard-to-reach holes. These taps have an extra-long shank for extended reach.

Taps for Steel and Stainless Steel

These taps are made of cobalt steel for higher strength and wear resistance than standard taps. Their flutes are designed to keep chips clear, so they don't need to be reversed to prevent buildup.

Taps for Hardened Steel and Iron

Tap threads into hardened steel and iron. These cobalt steel taps have straight flutes for high durability.

Taps for Nickel

To tap nickel and other hard material, these cobalt steel taps have high cutting strength. Their flutes are designed to keep chips clear, so they don't need to be reversed to prevent buildup.

Taps for Titanium

A high helix angle provides the cutting strength needed to tap threads in titanium. These cobalt steel taps have an open flute design that keeps chips clear, so they don't need to be reversed to prevent buildup.

Taps for Aluminum, Brass, and Plastic

Coated with chromium carbide or titanium carbonitride (TiCN), these cobalt steel taps cut smoothly through soft material to produce accurate threads.

Pipe and Conduit Thread Taps for Hardened Steel

Made of cobalt steel, these taps are for use on hard pipe and conduit material, such as hardened steel.

Pipe and Conduit Thread Taps
for Stainless Steel and Plastic

The spiral flutes on these pipe and conduit taps keep chips clear by drawing them back out of the hole, so there's no need to reverse the tap while cutting threads.

Tap and Drill Bit Sets

Drill and tap a variety of hole sizes. These taps and drill bits are for use on metal and plastic.

Drill Bit Decimal Size Equivalents

About Drill Bits

End Mills and Milling Cutters

Cobalt Steel Square End Mills

Roughing Cobalt Steel Square End Mills

Roughing Cobalt Steel Square EndMills for Aluminum, Brass, and Bronze

Cobalt Steel Square End Mills with Two Milling Ends

Cobalt Steel Dovetail End Mills

Cobalt Steel Ball End Mills with Two Milling Ends

Cobalt Steel Straight-Tooth Keyseat End Mills

Cobalt Steel Corner-Rounding End Mills

Cobalt Steel Rounded-Edge Square End Mills

Cobalt Steel Drill/Mill End Mills

Inch Size Hollow-Core Cutters for Magnetic-Base Drills

Inch Size Hollow-Core Cutters for Magnetic-Base Drills

Drill Bits

Cobalt Steel Drill Bits

Short-Flute Cobalt Steel Drill Bits

Short-Length Cobalt Steel Drill Bits

Short-Flute Extended-Length Cobalt Steel Drill Bits

Extended-Length Cobalt Steel Drill Bits

Chip-Clearing Cobalt Steel Drill Bits

Cobalt Steel Morse Taper-Shank Drill Bits

Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bits

Cobalt Steel 3/4" Diameter Reduced-Shank Drill Bits

Cobalt Steel Hex-Shank Drill Bits

Cobalt Steel Drill Bits for Stainless Steel and Nickel

Cobalt Steel Hole-Starting Drill Bits

Cobalt Steel Left-Hand Drill Bits

General Purpose Drill Bit Sets

Cobalt Steel Drill Bit Sets

Short-Flute Cobalt Steel Drill Bit Sets

Short-Length Cobalt Steel Drill Bit Sets

Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bit Sets

Countersinks

Cobalt Steel Countersinks for Screws

Cobalt Steel Countersinks for Rivets

Cobalt Steel Countersinks for Lathe Centers

Cobalt Steel Vibration-Resistant Through-HoleCountersinks with Two Countersinking Ends for Screws

Cobalt Steel Vibration-ResistantThrough-Hole Countersinks for Screws

Cobalt Steel Vibration-ResistantThrough-Hole Countersinks with Two Countersinking Ends for Lathe Centers

Cobalt Steel Vibration-ResistantThrough-Hole Countersinks for Lathe Centers

Internal Thread Cutting

Long-Reach Chip-Clearing Taps for Through Holes

Taps for Steel and Stainless Steel

Taps for Hardened Steel and Iron

Taps for Nickel

Taps for Titanium

Taps for Aluminum, Brass, and Plastic

Pipe and Conduit Thread Taps for Hardened Steel

Pipe and Conduit Thread Tapsfor Stainless Steel and Plastic

Tap and Drill Bit Sets

Tap and Drill Bit Sets

Roughing Cobalt Steel Square End
Mills for Aluminum, Brass, and Bronze

Cobalt Steel Vibration-Resistant Through-Hole
Countersinks with Two Countersinking Ends for Screws

Cobalt Steel Vibration-Resistant
Through-Hole Countersinks for Screws

Cobalt Steel Vibration-Resistant
Through-Hole Countersinks with Two
Countersinking Ends for Lathe Centers

Cobalt Steel Vibration-Resistant
Through-Hole Countersinks for Lathe Centers

Pipe and Conduit Thread Taps
for Stainless Steel and Plastic