About Reamers
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High-Speed Steel Round-Shank Reamers
The shank diameter is slightly smaller than the reamer diameter.
Straight-flute reamers are for general purpose cutting.
Spiral-flute reamers create a smoother finish than straight flutes and work well in keyways and other applications with an interrupted cut. Reamers with a right-hand spiral pull chips upward as they cut, so they’re often used in blind holes.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Dia. | Flute | Overall | Number of Flutes | Cutting Dia. Tolerance | For Use On | Each | |
Straight Flute | ||||||||
| 29/32" | 0.9063" | 2 5/8" | 10" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
| 15/16" | 0.9375" | 2 5/8" | 10" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 31/32" | 0.9688" | 2 5/8" | 10" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 0.9980" | 0.9980" | 2 5/8" | 10" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| 0.9995" | 0.9995" | 2 5/8" | 10" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| 1" | 1.0000" | 2 3/4" | 10 1/2" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1.0050" | 1.0050" | 2 3/4" | 10 1/2" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| 1.0100" | 1.0100" | 2 3/4" | 10 1/2" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| 1 1/16" | 1.0625" | 2 3/4" | 10 1/2" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 1/8" | 1.1250" | 2 7/8" | 11" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 3/16" | 1.1875" | 2 7/8" | 11" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Reamer | Lg. | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Dia. | Flute | Overall | Number of Flutes | Cut Direction | Cutting Dia. Tolerance | For Use On | Each | |
Right-Hand Spiral Flute | |||||||||
| 1 3/16" | 1.1875" | 2 7/8" | 11" | 10 | Right Hand | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
| 1 1/4" | 1.2500" | 3" | 11 1/2" | 10 | Right Hand | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 5/16" | 1.3125" | 3" | 11 1/2" | 10 | Right Hand | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 3/8" | 1.3750" | 3 1/4" | 12" | 10 | Right Hand | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 1/2" | 1.5000" | 3 1/2" | 12 1/2" | 10 | Right Hand | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Oversized High-Speed Steel Round-Shank Reamers
The reamer diameter accounts for the 0.001" oversized diameter rating, so these reamers create a looser fit than standard reamer sizes. The shank diameter is slightly smaller than the reamer diameter.
Straight-flute reamers are for general purpose cutting.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Diameter | Flute | Overall | Number of Flutes | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | ||||||||
Straight Flute | ||||||||
| 1.0010" | 1.0010" | 2 3/4" | 10 1/2" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
Undersized High-Speed Steel Round-Shank Reamers
These reamers create a tighter fit than standard reamer sizes. The reamer diameter accounts for the 0.001” undersized diameter rating. The shank diameter is slightly smaller than the reamer diameter.
Straight-flute reamers are for general purpose cutting.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Dia. | Flute | Overall | Number of Flutes | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | ||||||||
Straight Flute | ||||||||
| 0.9990" | 0.9990" | 2 5/8" | 10" | 10 | 0" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
Metric Size High-Speed Steel Round-Shank Reamers
The shank diameter is slightly smaller than the reamer diameter.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size, mm | Diameter, mm | Flute, mm | Overall, mm | Number of Flutes | Flute Style | Cutting Dia. Tolerance, mm | For Use On | Each | |
High-Speed Steel | |||||||||
| 30 | 30.0000 | 73 | 279.4 | 10 | Straight | 0 to 0.005 | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 0000000 |
Inch Size Hand Reamers
Use a straight-handle tap wrench (sold separately) to turn these reamers by hand. The cutting end is slightly tapered to ease hole entry for the final sizing of drilled holes. Choose a straight-handle tap wrench that fits the diameter of your hand reamer.
Straight-flute reamers are for general purpose cutting.
Spiral-flute reamers have a left-hand spiral and a right-hand cut. They push chips downward as they cut, so they’re often used in through holes. Spiral flutes create a smoother finish than straight flutes and work well in keyways and other applications with an interrupted cut.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | Direction | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Dia. | Square Shank Size | Flute | Overall | Number of Flutes | Spiral | Cut | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | |||||||||||
Straight Flute | |||||||||||
| 1 1/4" | 1.2500" | 0.935" | 6 1/8" | 12 1/4" | 10 | __ | __ | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
Spiral Flute | |||||||||||
| 1 1/4" | 1.2500" | 0.935" | 6 1/8" | 12 1/4" | 10 | Left Hand | Right Hand | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Morse Taper-Shank Reamers
The tapered shank fits the spindle hole of machine tools with a Morse taper. The shank diameter is slightly smaller than the reamer diameter.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Diameter | Morse Taper Number | Flute | Overall | Number of Flutes | Flute Style | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | ||||||||||
| 1 3/16" | 1.1875" | 3 | 2 7/8" | 11" | 10 | Straight | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
| 1 1/4" | 1.2500" | 4 | 3" | 11 1/2" | 10 | Straight | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 3/8" | 1.3750" | 4 | 3 1/4" | 12" | 10 | Straight | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 1 1/2" | 1.5000" | 4 | 3 1/2" | 12 1/2" | 10 | Straight | 0.0001" to 0.0004" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Expansion Round-Shank Reamers
When the reamer wears down, twist the set screw to expand the diameter, and then grind the reamer to its original size. These reamers are carbide-tipped tool steel for excellent abrasion and heat resistance when cutting hard and abrasive materials. The shank diameter is slightly smaller than the reamer diameter.
These reamers are not designed for producing holes larger than the listed diameter or for producing holes of various sizes. The adjustment screw should never be loosened.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Dia. | Flute | Overall | Number of Flutes | Flute Style | Recommended Expansion Limit | Cutting Dia. Tolerance | For Use On | Each | |
Carbide-Tipped Tool Steel | ||||||||||
| 1 3/4" | 1.7500" | 2 3/8" | 13 1/2" | 10 | Straight | 0.015" | 0" to 0.0003" | Aluminum, Brass, Bronze, Fiberglass, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 0000000 | 0000000 |
Inch Size Hand Reamers for Taper-Pin Holes
Hand turn these reamers with an adjustable wrench, straight-handle tap wrench, or pin vise (sold separately) to ream existing holes for use with standard taper pins.
Straight-flute reamers are for general purpose cutting.
Spiral-flute reamers have a left-hand spiral and a right-hand cut. They push chips downward as they cut, so they’re often used in through holes. Spiral flutes create a smoother finish than straight flutes and work well in keyways and other applications with an interrupted cut.
For pin size numbers 7/0 to 4/0, use an adjustable wrench or pin vise. For pin size numbers 3/0 to 14, use a straight-handle tap wrench.
For technical drawings and 3-D models, click on a part number.
Reamer Dia. | Lg. | Direction | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Taper Pin Number | (A) | (B) | Square Shank Size | Flute | Overall | Number of Flutes | Spiral | Cut | Cutting Dia. Tolerance | Rate of Taper | For Use On | Each | |
High-Speed Steel | |||||||||||||
Straight Flute | |||||||||||||
| 13 | 1.2590" | 1.0090" | 0.7950" | 12" | 16" | 10 | __ | __ | 0" to 0.5" | 1/4" per 12" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
| 14 | 1.5420" | 1.2500" | 1.0800" | 14" | 18 1/4" | 10 | __ | __ | 0" to 0.5" | 1/4" per 12" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Spiral Flute | |||||||||||||
| 13 | 1.2590" | 1.0090" | 0.7950" | 12" | 16" | 10 | Left Hand | Right Hand | 0" to 0.5" | 1/4" per 12" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 14 | 1.5420" | 1.2500" | 1.0800" | 14" | 18 1/4" | 10 | Left Hand | Right Hand | 0" to 0.5" | 1/4" per 12" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Round-Shank Reamers for Hole Deburring
Attach these reamers to hand-held drills. They’re also known as repairmen’s reamers.
Spiral-flute reamers remove burs from pipe and conduit in addition to countersinking, enlarging, and smoothing the edges of holes in thin sheet metal.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | Direction | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Size | Dia. (A) | Dia. (B) | Shank Dia. | For Pipe Size Range | Flute | Overall | Number of Flutes | Spiral | Cut | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | |||||||||||||
Spiral Flute | |||||||||||||
| 1/4"-1 15/32" | 1.4688" | 0.2500" | 1/2" | 1/4-1 1/4 | 3" | 5" | 10 | Left Hand | Right Hand | -0.003" to 0.003" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
| 3/16"-1 1/4" | 1.2500" | 0.1875" | 1/2" | 1/8-1 | 3 1/32" | 5 3/64" | 10 | Left Hand | Right Hand | -0.003" to 0.003" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Reamers for Taper-Pipe Holes
Use these reamers before tapping with taper-pipe taps. Turn by hand with a straight-handle tap wrench (sold separately). Flutes have a left-hand spiral and a right-hand cut and push chips downward, so they are commonly used in through holes.
For technical drawings and 3-D models, click on a part number.
Reamer Dia. | Lg. | Direction | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Pipe Size  | (A) | (B) | Square Shank Size | Flute | Overall | Number of Flutes | Flute Style | Spiral | Cut | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | |||||||||||||
| 1 | 1.2120" | 1.1030" | 0.8430" | 1 3/4" | 3 3/4" | 10 | Spiral | Left Hand | Right Hand | -0.001" to 0.001" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 |
Reamers for Morse Taper-Socket Holes
Turn existing straight drilled holes into Morse taper holes. These reamers are also good for sizing and smoothing existing Morse taper holes and for removing nicks and burs in machine spindles. Hand turn with an adjustable wrench or straight-handle tap wrench (sold separately).
For technical drawings and 3-D models, click on a part number.
Reamers | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Reamer Dia. | Lg. | Optional Straight-Handle Tap Wrenches | |||||||||||
| For Morse Taper Number | (A) | (B) | Square Shank Size | Flute | Overall | Number of Flutes | Flute Style | Cutting Dia. Tolerance | For Use On | Each | Each | ||
High-Speed Steel | |||||||||||||
| 4 | 1.2890" | 1.0170" | 0.8450" | 5 1/4" | 8 1/2" | 10 | Straight | -0.0005" to 0.0005" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 0000000 | 0000000 | 0000000 |
| 5 | 1.7990" | 1.4710" | 1.1250" | 6 1/4" | 9 3/4" | 10 | Straight | -0.0005" to 0.0005" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |