System of Measurement System of Measurement |
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Shank Type Shank Type |
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 | Square |
Reamer Type Reamer Type |
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Material Material |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Cut Direction Cut Direction |
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Spiral Direction Spiral Direction |
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About Reamers
More
Expansion Hand Reamers
Use an adjustable wrench or straight-handle tap wrench (sold separately) to turn these reamers by hand. When the reamer wears down, twist the set screw to expand the diameter, and then grind the reamer to its original size. The cutting end is slightly tapered to ease hole entry for the final sizing of drilled holes.
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.
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.
Reamers | ||||||||||||||
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Reamer | Lg. | Direction | Optional Straight-Handle Tap Wrenches | |||||||||||
| Size | Dia. | Square Shank Size | Flute | Overall | Number of Flutes | Spiral | Cut | Recommended Expansion Limit | Cutting Dia. Tolerance | For Use On | Each | Each | ||
High-Speed Steel | ||||||||||||||
Straight Flute | ||||||||||||||
| 1/4" | 0.2500" | 0.185" | 1 7/16" | 4 1/4" | 6 | __ | __ | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |
| 5/16" | 0.3125" | 0.235" | 1 3/4" | 4 1/2" | 6 | __ | __ | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 00000 |
| 3/8" | 0.3750" | 0.280" | 1 3/4" | 5" | 6 | __ | __ | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 00000 |
| 1/2" | 0.5000" | 0.375" | 1 13/16" | 5 1/2" | 6 | __ | __ | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 000000 | 00000 | 0000000 | 000000 |
| 5/8" | 0.6250" | 0.470" | 2 1/2" | 6 1/2" | 6 | __ | __ | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 000000 |
| 3/4" | 0.7500" | 0.560" | 2 11/16" | 7 1/16" | 8 | __ | __ | 0.013" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |
| 7/8" | 0.8750" | 0.655" | 3 5/16" | 8" | 8 | __ | __ | 0.013" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |
| 1" | 1.0000" | 0.750" | 3 3/4" | 8 7/8" | 8 | __ | __ | 0.013" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |
Spiral Flute | ||||||||||||||
| 1/4" | 0.2500" | 0.185" | 1 7/16" | 4 1/4" | 6 | Left Hand | Right Hand | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 00000 |
| 5/16" | 0.3125" | 0.235" | 1 3/4" | 4 1/2" | 6 | Left Hand | Right Hand | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 000000 | 00000 | 0000000 | 00000 |
| 3/8" | 0.3750" | 0.280" | 1 3/4" | 5" | 6 | Left Hand | Right Hand | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 00000 |
| 1/2" | 0.5000" | 0.375" | 1 13/16" | 5 1/2" | 6 | Left Hand | Right Hand | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 000000 |
| 5/8" | 0.6250" | 0.470" | 2 1/2" | 6 1/2" | 6 | Left Hand | Right Hand | 0.010" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 | 0000000 | 000000 |
| 3/4" | 0.7500" | 0.560" | 2 11/16" | 7 1/16" | 8 | Left Hand | Right Hand | 0.013" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |
| 7/8" | 0.8750" | 0.655" | 3 5/16" | 8" | 8 | Left Hand | Right Hand | 0.013" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |
| 1" | 1.0000" | 0.750" | 3 3/4" | 8 7/8" | 8 | Left Hand | Right Hand | 0.013" | -0.0005" to 0" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 | 0000000 | 000000 |