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 9/64 0.1406 0.135 1 4 4 Uncoated 22 $21.82 -
0.0575 0.051 1/2 2-1/2 4 Uncoated 18 $25.65 -
3/32 0.0938 0.0938 1/2 2 7/8 0.0120 4 Uncoated 24 $31.38 -
#12 0.1890 0.1805 1-1/8 4-1/2 6 Uncoated Call $13.76 -
#12 0.1805 0.1805 1-1/8 4-1/2 6 Uncoated 15 $29.65 -
#12 0.1890 0.1805 1-1/8 4-1/2 6 Uncoated 16 $26.72 -
#27 0.1440 0.135 1 4 4 Uncoated 47 $23.63 -
#27 0.1440 0.135 1 4 4 Uncoated 18 $21.82 -
0.058 0.051 1/2 2-1/2 4 Uncoated 19 $25.65 -
0.0940 0.0940 1/2 2 7/8 0.0120 4 Uncoated 100 $34.72 -
#11 0.1910 0.186 1-1/4 5 6 Uncoated Call $15.42 -
#11 0.1860 0.186 1-1/4 5 6 Uncoated 10 $33.03 -
#11 0.1910 0.186 1-1/4 5 6 Uncoated 16 $29.90 -
#26 0.1470 0.143 1 4 4 Uncoated 12 $23.63 -
#26 0.1470 0.143 1 4 4 Uncoated 46 $21.82 -
0.0585 0.051 1/2 2-1/2 4 Uncoated 18 $25.65 -
0.0945 0.0945 1/2 2 7/8 0.0120 4 Uncoated 30 $38.56 -
#10 0.1935 0.186 1-1/4 5 6 Uncoated Call $15.42 -
#10 0.1860 0.186 1-1/4 5 6 Uncoated 23 $33.03 -
#10 0.1935 0.186 1-1/4 5 6 Uncoated 19 $29.90 -
#25 0.1495 0.143 1 4 4 Uncoated 10 $23.63 -
#25 0.1495 0.143 1 4 4 Uncoated 19 $21.82 -
0.059 0.051 1/2 2-1/2 4 Uncoated 22 $25.65 -
0.0950 0.0950 1/2 2 7/8 0.0120 4 Uncoated 42 $34.72 -
#9 0.1960 0.1895 1-1/4 5 6 Uncoated Call $15.42 -
#9 0.1895 0.1895 1-1/4 5 6 Uncoated 14 $33.03 -
#9 0.1960 0.1895 1-1/4 5 6 Uncoated 13 $29.90 -
#24 0.1520 0.146 1 4 4 Uncoated 24 $23.63 -
#24 0.1520 0.146 1 4 4 Uncoated 8 $21.82 -
0.06 0.0585 1/2 2-1/2 4 Uncoated 36 $25.65 -
#41 0.0960 0.0960 5/8 2 7/8 0.0120 4 Uncoated 19 $32.91 -
5.0mm 0.1969 0.1895 1-1/4 5 6 Uncoated Call $15.42 -
5.0mm 0.1895 0.1895 1-1/4 5 6 Uncoated 11 $33.03 -
5.0mm 0.1969 0.1895 1-1/4 5 6 Uncoated 7 $29.90 -
#23 0.1540 0.146 1 4 4 Uncoated 29 $23.63 -
#23 0.1540 0.146 1 4 4 Uncoated 19 $21.82 -
0.0605 0.0585 1/2 2-1/2 4 Uncoated 100 $25.65 -
0.0970 0.0970 5/8 2 1-1/8 0.0150 4 Uncoated 29 $34.72 -
#8 0.1990 0.1895 1-1/4 5 6 Uncoated Call $15.42 -
#8 0.1895 0.1895 1-1/4 5 6 Uncoated 100 $33.03 -
#8 0.1990 0.1895 1-1/4 5 6 Uncoated 5 $29.90 -
5/32 0.1563 0.151 1 4 4 Uncoated 16 $23.63 -
5/32 0.1562 0.151 1 4 4 Uncoated 42 $21.82 -
0.061 0.0585 1/2 2-1/2 4 Uncoated 33 $25.65 -
#40 0.0980 0.0980 5/8 2 1-1/8 0.0150 4 Uncoated 21 $32.91 -
#7 0.2010 0.1895 1-1/4 5 6 Uncoated Call $15.42 -
#7 0.1895 0.1895 1-1/4 5 6 Uncoated 7 $33.03 -
#7 0.2010 0.1895 1-1/4 5 6 Uncoated 13 $29.90 -
#22 0.1570 0.151 1 4 6 Uncoated 58 $23.63 -
#22 0.1570 0.151 1 4 6 Uncoated 61 $21.82 -
0.0615 0.0585 1/2 2-1/2 4 Uncoated 66 $25.65 -
2.5mm 0.0984 2.500 5/8 2 38mm 0.0150 4 Uncoated 22 $34.72 -
13/64 0.2031 0.1945 1-1/4 5 6 Uncoated Call $15.42 -
13/64 0.1945 0.1945 1-1/4 5 6 Uncoated 10 $33.03 -
13/64 0.2031 0.1945 1-1/4 5 6 Uncoated 16 $29.90 -
4.0mm 0.1575 0.151 1 4 6 Uncoated 21 $23.63 -
4.0mm 0.1575 0.151 1 4 6 Uncoated 100 $21.82 -
0.062 0.0585 1/2 2-1/2 4 Uncoated 88 $25.65 -
0.0990 0.0990 5/8 2-1/4 1-1/8 0.0150 4 Uncoated 56 $34.72 -
#6 0.2040 0.1945 1-1/4 5 6 Uncoated Call $15.42 -
#6 0.1945 0.1945 1-1/4 5 6 Uncoated 6 $33.03 -
#6 0.2040 0.1945 1-1/4 5 6 Uncoated 16 $29.90 -
#21 0.1590 0.153 1-1/8 4-1/2 6 Uncoated 65 $25.07 -
#21 0.1590 0.153 1-1/8 4-1/2 6 Uncoated 28 $23.30 -
0.063 0.0585 1/2 2-1/2 4 Uncoated 100 $22.97 -
#39 0.0995 0.0995 5/8 2-1/4 1-1/8 0.0150 4 Uncoated 13 $32.91 -
#5 0.2055 0.2016 1-1/4 5 6 Uncoated Call $15.42 -
#5 0.2016 0.2016 1-1/4 5 6 Uncoated 4 $33.03 -
#5 0.2055 0.2016 1-1/4 5 6 Uncoated 12 $29.90 -
#20 0.1610 0.153 1-1/8 4-1/2 6 Uncoated 17 $25.07 -
#20 0.1610 0.153 1-1/8 4-1/2 6 Uncoated 33 $23.30 -
0.064 0.066 3/4 3 4 Uncoated 46 $22.97 -
0.1000 0.1000 5/8 2-1/4 1-1/8 0.0150 4 Uncoated 19 $34.72 -
#4 0.2090 0.2016 1-1/4 5 6 Uncoated Call $15.42 -
#4 0.2016 0.2016 1-1/4 5 6 Uncoated 82 $33.03 -
#4 0.2090 0.2016 1-1/4 5 6 Uncoated 13 $29.90 -
#19 0.1660 0.1595 1-1/8 4-1/2 6 Uncoated 69 $25.07 -
#19 0.1660 0.1595 1-1/8 4-1/2 6 Uncoated 35 $23.30 -
0.0645 0.066 3/4 3 4 Uncoated 32 $22.97 -
0.1010 0.1010 5/8 2-1/4 1-1/8 0.0150 4 Uncoated 9 $34.72 -
#3 0.2130 0.2075 1-1/4 5 6 Uncoated Call $15.42 -
#3 0.2075 0.2075 1-1/4 5 6 Uncoated 8 $33.03 -
#3 0.2130 0.2075 1-1/4 5 6 Uncoated 19 $29.90 -
#18 0.1695 0.1595 1-1/8 4-1/2 6 Uncoated 15 $25.07 -
#18 0.1695 0.1595 1-1/8 4-1/2 6 Uncoated 21 $23.30 -
0.065 0.066 3/4 3 4 Uncoated 33 $22.97 -
#38 0.1015 0.1015 5/8 2-1/4 1-1/8 0.0150 4 Uncoated 17 $32.91 -
5.5mm 0.2165 0.2075 1-1/4 5 6 Uncoated Call $15.42 -
5.5mm 0.2075 0.2075 1-1/4 5 6 Uncoated 14 $33.03 -
5.5mm 0.2165 0.2075 1-1/4 5 6 Uncoated 12 $29.90 -
11/64 0.1719 0.1645 1-1/8 4-1/2 6 Uncoated 13 $25.07 -
11/64 0.1719 0.1645 1-1/8 4-1/2 6 Uncoated 10 $23.30 -
0.0655 0.066 3/4 3 4 Uncoated 39 $22.97 -
0.1020 0.1020 5/8 2-1/4 1-1/8 0.0150 4 Uncoated Call $34.72 -
7/32 0.2188 0.2075 1-1/4 5 6 Uncoated Call $15.42 -
7/32 0.2075 0.2075 1-1/4 5 6 Uncoated 12 $33.03 -
7/32 0.2188 0.2075 1-1/4 5 6 Uncoated 25 $29.90 -
#17 0.1730 0.1645 1-1/8 4-1/2 6 Uncoated 43 $25.07 -
#17 0.1730 0.1645 1-1/8 4-1/2 6 Uncoated 54 $23.30 -
0.066 0.066 3/4 3 4 Uncoated 30 $22.97