Machine Reamers | McMaster-Carr

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	Shank Diameter Shank Diameter

	Spiral Direction Spiral Direction

Left Hand

Right Hand

	Application Application

	Cut Direction Cut Direction

Right Hand

Left Hand

	Number of Pieces Number of Pieces

	Reach Length Reach Length

	Container Type Container Type

Metal Case

Wood Case

Roll Pouch

	For Dowel Pin Diameter For Dowel Pin Diameter

	For Taper Pin Number For Taper Pin Number

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About Reamers

High-Speed Steel Round-Shank Reamers

These are standard inch‐sized reamers.

Oversized High-Speed Steel Round-Shank Reamers

Create a looser fit than standard reamer sizes.

Undersized High-Speed Steel Round-Shank Reamers

Use these reamers to create a tighter fit than standard reamer sizes.

Metric Size High-Speed Steel Round-Shank Reamers

These are standard metric-sized reamers.

Wire Gauge Size High-Speed
Steel Round-Shank Reamers

These standard reamers come in wire gauge sizes.

Letter Size High-Speed Steel Round-Shank Reamers

These letter size cobalt steel reamers offer good performance on hard-to-machine materials.

Carbide Round-Shank Reamers

These are standard inch‐sized reamers.

Oversized Carbide Round-Shank Reamers

These reamers create looser fit than standard reamer diameters.

Undersized Carbide Round-Shank Reamers

Create a tighter fit than standard reamer diameters.

Metric Size Carbide Round-Shank Reamers

These are standard metric-sized reamers.

Wire Gauge Size Carbide Round-Shank Reamers

These standard reamers come in wire gauge sizes.

Cobalt Steel Round-Shank Reamers

Choose these cobalt steel reamers for good performance on hard-to-machine materials.

Oversized Cobalt Steel Round-Shank Reamers

These reamers have a looser fit than reamers with standard diameters.

Undersized Cobalt Steel Round-Shank Reamers

Choose these reamers to create a tighter fit than standard reamer diameters.

Metric Size Cobalt Steel Round-Shank Reamers

Offering good performance on hard-to-machine materials, these cobalt steel reamers come in metric sizes.

Wire Gauge Cobalt Steel Round-Shank Reamers

Available in wire gauge sizes, these reamers perform well on hard-to-machine materials.

Letter Size Cobalt Steel Round-Shank Reamers

These letter size cobalt steel reamers offer good performance on hard-to-machine materials.

Carbide-Tipped Round-Shank Reamers

More abrasion resistant than cobalt steel and high-speed steel reamers, these maintain a sharper, harder edge at high temperatures for excellent performance on hard and abrasive materials.

Threaded-Shank Reamers

These reamers have a 1/4”-28 threaded shank.

Morse Taper-Shank Reamers

The tapered shank fits the spindle hole of machine tools with a Morse taper.

Arbor-Mount Reamers

Smooth and expand hole diameters that are 1 ¾" and larger with these reamers.

Expansion Round-Shank Reamers

These reamers are designed for use in drill presses, turret lathes, screw machines, and other machine tools.

Round-Shank Drill Reamers

Drill and finish holes in a single pass with these dual-purpose tools.

Reamers for Hole Alignment

Round-Shank Reamers for Hole
Alignment with Safety Collar

A collar on the shank prevents you from reaming past the cutting edge.

Round-Shank Reamers for Hole Alignment

For use with hand-held electric and air tools, these ream, true, enlarge, align, and deburr holes.

Short-Length Round-Shank Reamers for Hole Alignment

Correct hole misalignment when working in confined spaces. About 2" shorter than standard hole-alignment reamers of similar thicknesses, these reamers give you extra room to move when there’s limited space between you and your workpiece.

Hex Nut-Shank Reamers for Hole
Alignment with Safety Magnets

Magnets on the hex nut hold the reamer in place in your tool and prevent it from accidentally falling.

Hex Nut-Shank Reamers for Hole Alignment

The hex nut on the end of the shank lets you use these reamers with square-drive impact wrench sockets.

Morse Taper-Shank Reamers for Hole Alignment

Use these reamers in stationary machines.

Reamers for Taper-Pin Holes

Inch Size Combination Drill Bit/Round-Shank
Reamers for Taper-Pin Holes

Drill and ream holes for tapered pins with the same tool. They are for use in drill presses, turret lathes, screw machines, and other machine tools.

Metric Size Combination Drill Bit/Round-Shank
Reamers for Taper-Pin Holes

Available in metric sizes, these tools let you drill and ream holes with the same tool. They are for use in drill presses, turret lathes, screw machines, and other machine tools.

Inch Size Round-Shank Reamers for Taper-Pin Holes

Use these inch size reamers in drill presses, turret lathes, screw machines, and other machine tools.

Metric Size Round-Shank Reamers for Taper-Pin Holes

Available in metric sizes, these reamers are used in drill presses, turret lathes, screw machines, and other machine tools.

Reamers for Dowel Pins

High-Speed Steel Reamers for Dowel Pins

For general purpose applications.

Carbide Reamers for Dowel Pins

Solid carbide is harder, stronger, and more wear resistant than cobalt steel and high-speed steel for the highest accuracy and longest tool life. These reamers retain a sharp, hard edge at high temperatures for the best performance on hard and abrasive materials.

Cobalt Steel Reamers for Dowel Pins

Better abrasion and heat resistance than high-speed steel for up to 25% faster cutting.

Round-Shank Reamers for Hole Deburring

Attach these reamers to hand-held drills.

Hole-Enlarging Drill Bits

Enlarge existing holes without changing their depth.

Reamer Sets

Metric Size High-Speed Steel Reamer Sets

Use these metric size reamers for general purpose applications.

Inch Size High-Speed Steel Reamer Sets

Sets include standard size reamers for general purpose applications.

Undersized/Oversized High-Speed Steel Reamer Sets

These allow for a slightly tighter or looser fit than standard reamer diameters.

Wire Gauge Size High-Speed Steel Reamer Sets

The reamers in these sets come in wire gauge sizes for general purpose applications.

Inch Size High-Speed Steel Drill-Length Reamer Sets

Sets include standard size reamers for general purpose applications.

Letter Size High-Speed Steel Drill-Length Reamer Sets

Use these letter size reamers for general purpose applications.

Wire Gauge Size High-Speed
Steel Drill-Length Reamer Sets