Reamers
Atlas Cutting Tools carries one of the most complete ranges of reamer sizes and styles in the industry, including over 5,000 HSS and Cobalt Chucking Reamers alone. Shop Chucking Reamers (straight flute and spiral flute, in HSS, Cobalt, and Carbide), Dowel Pin Reamers, Expansion Reamers, Hand Reamers, Taper Pin Reamers, and specialty items like Bridge Reamers, Capscrew Counterbores, Construction Reamers, Safety Reamers, and Taper Pipe Reamers.
Reamers are precision-ground for tight tolerance hole finishing after drilling or boring, and material choice matters: HSS suits general-purpose work, Cobalt holds up better in stainless and tougher alloys, and Carbide delivers the longest tool life in high-volume production. All reamers are USA manufactured, and most sizes ship the same day with a 97% fill rate.
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Size (D1) Decimal Equivalent (D1) Flute Diameter (D1) Shank Diameter (D2) Pilot Length (L2) Pilot Diameter (D3) Flute Length (L2) Overall Length (L1) Total Reach (L3) Axial Chamfer Morse Taper Small Diameter Large Diameter Body Length (L3) Size of Square Hex Shank Diameter Number of Flutes Coating In Stock Sku Price Quantity 4.0mm 0.1575 0.151 1 4 6 Uncoated 15 $26.06 -
7/64 0.1094 0.103 7/8 3-1/2 4 Uncoated 19 $19.84 -
7/64 0.1094 0.103 7/8 3-1/2 4 Uncoated 61 $18.15 -
0.0495 0.051 1/2 2-1/2 4 Uncoated 12 $25.65 -
0.0830 0.0830 1/2 2 7/8 0.0120 4 Uncoated 24 $34.72 -
#21 0.1590 0.153 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#21 0.1530 0.153 1-1/8 4-1/2 6 Uncoated 17 $29.57 -
#21 0.1590 0.153 1-1/8 4-1/2 6 Uncoated 7 $26.72 -
#35 0.1100 0.103 7/8 3-1/2 4 Uncoated 20 $19.84 -
#35 0.1100 0.103 7/8 3-1/2 4 Uncoated 22 $18.15 -
0.05 0.051 1/2 2-1/2 4 Uncoated 47 $25.65 -
0.0840 0.0840 1/2 2 7/8 0.0120 4 Uncoated 22 $34.72 -
#20 0.1610 0.153 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#20 0.1530 0.153 1-1/8 4-1/2 6 Uncoated 16 $29.57 -
#20 0.1610 0.153 1-1/8 4-1/2 6 Uncoated 25 $26.72 -
#34 0.1110 0.1055 7/8 3-1/2 4 Uncoated 14 $19.84 -
#34 0.1110 0.1055 7/8 3-1/2 4 Uncoated 15 $18.15 -
0.0505 0.051 1/2 2-1/2 4 Uncoated 9 $25.65 -
0.0850 0.0850 1/2 2 7/8 0.0120 4 Uncoated 17 $34.72 -
#19 0.1660 0.1595 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#19 0.1595 0.1595 1-1/8 4-1/2 6 Uncoated 16 $29.57 -
#19 0.1660 0.1595 1-1/8 4-1/2 6 Uncoated 15 $26.72 -
#33 0.1130 0.1055 7/8 3-1/2 4 Uncoated 19 $19.84 -
#33 0.1130 0.1055 7/8 3-1/2 4 Uncoated 19 $18.15 -
0.051 0.051 1/2 2-1/2 4 Uncoated 16 $25.65 -
#44 0.0860 0.0860 1/2 2 7/8 0.0120 4 Uncoated 18 $32.91 -
#18 0.1695 0.1595 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#18 0.1595 0.1595 1-1/8 4-1/2 6 Uncoated 9 $22.51 -
#18 0.1695 0.1595 1-1/8 4-1/2 6 Uncoated 8 $26.72 -
#32 0.1160 0.112 7/8 3-1/2 4 Uncoated 20 $19.84 -
#32 0.1160 0.112 7/8 3-1/2 4 Uncoated 14 $18.15 -
0.0515 0.051 1/2 2-1/2 4 Uncoated 8 $25.65 -
0.0870 0.0870 1/2 2 7/8 0.0120 4 Uncoated 14 $34.72 -
11/64 0.1719 0.1645 1-1/8 4-1/2 6 Uncoated Call $13.76 -
11/64 0.1645 0.1645 1-1/8 4-1/2 6 Uncoated 19 $29.57 -
11/64 0.1719 0.1645 1-1/8 4-1/2 6 Uncoated 3 $26.72 -
3.0mm 0.1181 0.112 7/8 3-1/2 4 Uncoated 19 $19.84 -
3.0mm 0.1181 0.112 7/8 3-1/2 4 Uncoated 50 $18.15 -
0.0525 0.051 1/2 2-1/2 4 Uncoated 15 $25.65 -
0.0880 0.0880 1/2 2 7/8 0.0120 4 Uncoated 13 $34.72 -
#17 0.1730 0.1645 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#17 0.1645 0.1645 1-1/8 4-1/2 6 Uncoated 15 $29.57 -
#17 0.1730 0.1645 1-1/8 4-1/2 6 Uncoated 10 $26.72 -
#31 0.1200 0.112 7/8 3-1/2 4 Uncoated 24 $19.84 -
#31 0.1200 0.112 7/8 3-1/2 4 Uncoated 26 $18.15 -
0.053 0.051 1/2 2-1/2 4 Uncoated 18 $25.65 -
#43 0.0890 0.0890 1/2 2 7/8 0.0120 4 Uncoated Call $32.91 -
#16 0.1770 0.1704 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#16 0.1704 0.1704 1-1/8 4-1/2 6 Uncoated 8 $29.57 -
#16 0.1770 0.1704 1-1/8 4-1/2 6 Uncoated 5 $26.72 -
0.124 O/U 0.1240 0.119 7/8 3-1/2 4 Uncoated 24 $19.84 -
0.124 O/U 0.1240 0.119 7/8 3-1/2 4 Uncoated 56 $18.15 -
0.0535 0.051 1/2 2-1/2 4 Uncoated 12 $25.65 -
0.0900 0.0900 1/2 2 7/8 0.0120 4 Uncoated 17 $34.72 -
4.5mm 0.1772 0.1704 1-1/8 4-1/2 6 Uncoated Call $13.76 -
4.5mm 0.1704 0.1704 1-1/8 4-1/2 6 Uncoated 7 $29.57 -
4.5mm 0.1772 0.1704 1-1/8 4-1/2 6 Uncoated 5 $26.72 -
1/8 0.1250 0.119 7/8 3-1/2 4 Uncoated 52 $17.78 -
1/8 0.1250 0.119 7/8 3-1/2 4 Uncoated 100 $16.50 -
0.054 0.051 1/2 2-1/2 4 Uncoated 21 $25.65 -
0.0910 0.0910 1/2 2 7/8 0.0120 4 Uncoated 13 $34.72 -
#15 0.1800 0.1755 1-1/8 4-1/2 6 Uncoated Call $19.85 -
#15 0.1755 0.1755 1-1/8 4-1/2 6 Uncoated 9 $29.65 -
#15 0.1800 0.1755 1-1/8 4-1/2 6 Uncoated 16 $26.72 -
0.126 O/U 0.1260 0.119 7/8 3-1/2 4 Uncoated 17 $19.84 -
0.126 O/U 0.1260 0.119 7/8 3-1/2 4 Uncoated 100 $18.15 -
0.0545 0.051 1/2 2-1/2 4 Uncoated 8 $25.65 -
0.0915 0.0915 1/2 2 7/8 0.0120 4 Uncoated 13 $45.69 -
#14 0.1820 0.1755 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#14 0.1755 0.1755 1-1/8 4-1/2 6 Uncoated 5 $29.57 -
#14 0.1820 0.1755 1-1/8 4-1/2 6 Uncoated 12 $26.72 -
#30 0.1285 0.119 7/8 3-1/2 4 Uncoated 18 $19.84 -
#30 0.1285 0.119 7/8 3-1/2 4 Uncoated 75 $18.15 -
0.0555 0.051 1/2 2-1/2 4 Uncoated 21 $25.65 -
0.0920 0.0920 1/2 2 7/8 0.0120 4 Uncoated 56 $34.72 -
#13 0.1850 0.1805 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#13 0.1805 0.1805 1-1/8 4-1/2 6 Uncoated 9 $29.57 -
#13 0.1850 0.1805 1-1/8 4-1/2 6 Uncoated 13 $26.72 -
#29 0.1360 0.1275 1 4 4 Uncoated 17 $23.63 -
#29 0.1360 0.1275 1 4 4 Uncoated 59 $21.82 -
0.056 0.051 1/2 2-1/2 4 Uncoated 24 $25.65 -
0.0925 0.0925 1/2 2 7/8 0.0120 4 Uncoated 18 $38.56 -
0.1865 O/U 0.1865 0.1805 1-1/8 4-1/2 6 Uncoated Call $14.30 -
0.1865 O/U 0.1805 0.1805 1-1/8 4-1/2 6 Uncoated 71 $29.65 -
0.1865 O/U 0.1865 0.1805 1-1/8 4-1/2 6 Uncoated 13 $26.72 -
3.5mm 0.1378 0.135 1 4 4 Uncoated 9 $23.63 -
3.5mm 0.1378 0.135 1 4 4 Uncoated 29 $21.82 -
0.0565 0.051 1/2 2-1/2 4 Uncoated 13 $25.65 -
0.0930 0.0930 1/2 2 7/8 0.0120 4 Uncoated 50 $34.72 -
3/16 0.1875 0.1805 1-1/8 4-1/2 6 Uncoated Call $14.30 -
3/16 0.1805 0.1805 1-1/8 4-1/2 6 Uncoated 15 $28.17 -
3/16 0.1875 0.1805 1-1/8 4-1/2 6 Uncoated 19 $25.28 -
#28 0.1405 0.135 1 4 4 Uncoated 10 $23.51 -
#28 0.1405 0.135 1 4 4 Uncoated 18 $21.82 -
0.057 0.051 1/2 2-1/2 4 Uncoated 19 $25.49 -
#42 0.0935 0.0935 1/2 2 7/8 0.0120 4 Uncoated 30 $32.91 -
0.1885 O/U 0.1885 0.1805 1-1/8 4-1/2 6 Uncoated Call $13.76 -
0.1885 O/U 0.1805 0.1805 1-1/8 4-1/2 6 Uncoated 19 $29.65 -
0.1885 O/U 0.1885 0.1805 1-1/8 4-1/2 6 Uncoated 19 $26.72 -
9/64 0.1406 0.135 1 4 4 Uncoated 18 $23.63