About Reamers
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Wire Gauge Size High-Speed Steel Round-Shank Reamers
With Straight Flutes
Wire gauge sizes 1 to 70 have a shank diameter that's slightly smaller than the reamer diameter. Wire gauge sizes 71 to 80 have a shank diameter that's equal to the reamer diameter.
Spiral-flute reamers have a right-hand spiral and a right-hand cut. They pull chips upward as they cut, so they’re often used in blind 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. | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Dia. | Flute | Overall | Number of Flutes | Cutting Dia. Tolerance | For Use On | Each | |
High-Speed Steel | ||||||||
Straight Flute | ||||||||
| 80 ga | 0.0135" | 3/8" | 3/4" | 2 | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 000000 |
| 79 ga | 0.0145" | 3/8" | 3/4" | 2 | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 78 ga | 0.0160" | 3/8" | 7/8" | 2 | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 77 ga | 0.0180" | 3/8" | 7/8" | 2 | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
| 76 ga | 0.0200" | 3/8" | 7/8" | 2 | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
Wire Gauge Cobalt Steel Round-Shank Reamers
Cobalt steel has good performance on hard-to-machine materials. Wire gauge sizes 1 to 60 have a shank diameter that's slightly smaller than the reamer diameter. Wire gauge sizes 61 to 80 have a shank diameter that's equal to the reamer diameter.
For technical drawings and 3-D models, click on a part number.
Reamer | Lg. | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Size | Diameter | Flute | Overall | Number of Flutes | Flute Style | Cutting Dia. Tolerance | For Use On | Each | |
Cobalt Steel | |||||||||
| 80 ga | 0.0135" | 3/8" | 3/4" | 2 | Straight | 0" to 0.0002" | Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 000000 |
| 79 ga | 0.0145" | 3/8" | 3/4" | 2 | Straight | 0" to 0.0002" | Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 78 ga | 0.0160" | 3/8" | 7/8" | 2 | Straight | 0" to 0.0002" | Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 77 ga | 0.0180" | 3/8" | 7/8" | 2 | Straight | 0" to 0.0002" | Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
| 76 ga | 0.0200" | 3/8" | 7/8" | 2 | Straight | 0" to 0.0002" | Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium, Tool Steel | 00000000 | 00000 |
Inch Size Combination Drill Bit/Round-Shank Reamers for Taper-Pin Holes
Drill and ream holes for taper pins with the same tool. These tools have chip breakers on the cutting edge.
For technical drawings and 3-D models, click on a part number.
Reamer Dia. | Lg. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Taper Pin Number | (A) | (B) | Flute | Overall | Number of Flutes | Flute Style | Spiral Direction | Rate of Taper | Point Angle | For Use On | Each | |
High-Speed Steel | ||||||||||||
| 2/0 | 0.1430" | 0.1013" | 2" | 3 1/4" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 3/0 | 0.1270" | 0.0879" | 1 7/8" | 3 1/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 4/0 | 0.1110" | 0.0772" | 1 5/8" | 2 7/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 5/0 | 0.0950" | 0.0664" | 1 3/8" | 2 5/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 0 | 0.1580" | 0.1137" | 2 1/8" | 3 3/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 1 | 0.1740" | 0.1245" | 2 3/8" | 3 3/4" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 2 | 0.1950" | 0.1325" | 3" | 4 3/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 3 | 0.2200" | 0.1575" | 3" | 4 1/2" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 4 | 0.2530" | 0.1775" | 3 5/8" | 5 1/4" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 5 | 0.2920" | 0.1983" | 4 1/2" | 6 1/4" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 6 | 0.3470" | 0.2455" | 4 7/8" | 6 7/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 7 | 0.4120" | 0.2818" | 6 1/4" | 8 1/2" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 8 | 0.5060" | 0.3600" | 7" | 9 3/4" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 9 | 0.6330" | 0.4638" | 8 1/8" | 11 3/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 10 | 0.7600" | 0.5647" | 9 3/8" | 12 7/8" | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
Metric Size Combination Drill Bit/Round-Shank Reamers for Taper-Pin Holes
The same tool drills and reams holes for taper pins. They have chip breakers on the cutting edge.
For technical drawings and 3-D models, click on a part number.
Reamer Dia. | Lg. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Taper Pin Number, mm | (A), mm | (B), mm | Flute, mm | Overall, mm | Number of Flutes | Flute Style | Spiral Direction | Rate of Taper | Point Angle | For Use On | Each | |
High-Speed Steel | ||||||||||||
| 2 | 2.8400 | 1.9800 | 43 | 65 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 2.5 | 3.4600 | 2.3300 | 56 | 89 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 3 | 4.1600 | 2.8400 | 66 | 98 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 4 | 5.4000 | 3.7800 | 81 | 119 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 5 | 6.6400 | 4.7000 | 97 | 138 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 6 | 8.2800 | 5.7100 | 129 | 179 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
| 8 | 10.7200 | 7.6400 | 154 | 211 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 10 | 13.1600 | 9.6500 | 175 | 246 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 12 | 15.7000 | 11.9600 | 198 | 275 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 13 | 16.7400 | 12.6100 | 206 | 303 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 14 | 18.0000 | 13.8000 | 210 | 310 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |
| 16 | 20.4000 | 15.8000 | 230 | 335 | 2 | Spiral | Right Hand | 1" per 50" | 118° | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 000000 |