System of Measurement System of Measurement |
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Reamer Diameter Reamer Diameter |
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Material Material |
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Reamer Size Reamer Size |
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Shank Type Shank Type |
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![]() | Round |
Reamer Type Reamer Type |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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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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Spiral Direction Spiral Direction |
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About Reamers
More
Wire Gauge Size High-Speed Steel Round-Shank Reamers

With Straight Flutes

With Spiral 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. | ||||||||
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Size | Dia. | Flute | Overall | Number of Flutes | Spiral Direction | 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 |
75 ga | 0.0210" | 1/2" | 1" | 3 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
74 ga | 0.0225" | 1/2" | 1" | 3 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
73 ga | 0.0240" | 1/2" | 1 1/8" | 3 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
72 ga | 0.0250" | 1/2" | 1 1/8" | 3 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
71 ga | 0.0260" | 1/2" | 1 1/4" | 3 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
70 ga | 0.0280" | 1/2" | 1 1/4" | 3 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
69 ga | 0.0292" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
68 ga | 0.0310" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
67 ga | 0.0320" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
66 ga | 0.0330" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
65 ga | 0.0350" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
64 ga | 0.0360" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
63 ga | 0.0370" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
62 ga | 0.0380" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
61 ga | 0.0390" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
60 ga | 0.0400" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
59 ga | 0.0410" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
58 ga | 0.0420" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
57 ga | 0.0430" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
56 ga | 0.0465" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
55 ga | 0.0520" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
54 ga | 0.0550" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
53 ga | 0.0595" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
52 ga | 0.0635" | 1/2" | 2 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
51 ga | 0.0670" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
50 ga | 0.0700" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
49 ga | 0.0730" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
48 ga | 0.0760" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
47 ga | 0.0785" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
46 ga | 0.0810" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
45 ga | 0.0820" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
44 ga | 0.0860" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
43 ga | 0.0890" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
42 ga | 0.0935" | 3/4" | 3" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
41 ga | 0.0960" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
40 ga | 0.0980" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
39 ga | 0.0995" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
38 ga | 0.1015" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
37 ga | 0.1040" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
36 ga | 0.1065" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
35 ga | 0.1100" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
34 ga | 0.1110" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
33 ga | 0.1130" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
32 ga | 0.1160" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
31 ga | 0.1200" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
30 ga | 0.1285" | 7/8" | 3 1/2" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
29 ga | 0.1360" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
28 ga | 0.1405" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
27 ga | 0.1440" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
26 ga | 0.1470" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
25 ga | 0.1495" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
24 ga | 0.1520" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
23 ga | 0.1540" | 1" | 4" | 4 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
22 ga | 0.1570" | 1" | 4" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
21 ga | 0.1590" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
20 ga | 0.1610" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
19 ga | 0.1660" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
18 ga | 0.1695" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
17 ga | 0.1730" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
16 ga | 0.1770" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
15 ga | 0.1800" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
14 ga | 0.1820" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
13 ga | 0.1850" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
12 ga | 0.1890" | 1 1/8" | 4 1/2" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
11 ga | 0.1910" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
10 ga | 0.1935" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
9 ga | 0.1960" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
8 ga | 0.1990" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
7 ga | 0.2010" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
6 ga | 0.2040" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
5 ga | 0.2055" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
4 ga | 0.2090" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
3 ga | 0.2130" | 1 1/4" | 5" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
2 ga | 0.2210" | 1 1/2" | 6" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
1 ga | 0.2280" | 1 1/2" | 6" | 6 | __ | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 0000000 | 00000 |
Spiral Flute | |||||||||
60 ga | 0.0400" | 1/2" | 2 1/2" | 4 | Right Hand | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
59 ga | 0.0410" | 1/2" | 2 1/2" | 4 | Right Hand | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
58 ga | 0.0420" | 1/2" | 2 1/2" | 4 | Right Hand | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
57 ga | 0.0430" | 1/2" | 2 1/2" | 4 | Right Hand | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |
56 ga | 0.0465" | 1/2" | 2 1/2" | 4 | Right Hand | 0" to 0.0002" | Aluminum, Brass, Bronze, Iron, Plastic, Stainless Steel, Steel | 00000000 | 00000 |