Machinery's Handbook, 31st Edition
926
Reamers All dimensions are given in inches. Material is high-speed steel. Chucking reamers are end cutting on the chamfer and the relief for the outside diameter is ground in back of the margin for the full length of land. Lands of rose chucking reamers are not relieved on the periphery but have a relatively large amount of back taper. Tolerances: On reamer diameter, up to 1 ⁄ 4 -inch size, incl., + .0001 to + .0004 inch; over 1 ⁄ 4 - to 1-inch size, incl., + .0001 to + .0005 inch; over 1-inch size, + .0002 to + .0006 inch. On length overall A and flute length B , up to 1-inch size, incl., ± 1 ⁄ 16 inch; 1 1 ⁄ 16 - to 1 1 ⁄ 2 -inch size, incl., ± 3 ⁄ 32 inch. Helical flutes are right- or left-hand helix, right-hand cut, except sizes 1 1 ⁄ 16 through 1 1 ⁄ 2 inches, which are right-hand helix only. Shell Reamers—Straight and Helical Flutes ANSI/ASME B94.2-1995 (R2015)
H
H
B
B
A
A
Diameter of Reamer
Fitting Arbor No.
Length Overall A
Flute Length B
Hole Diameter Large End H
Number of Flutes 8 to 10 8 to 10 8 to 10 8 to 10 8 to 12 8 to 12 8 to 12 8 to 12 8 to 12 8 to 12 8 to 12 10 to 14 10 to 14 10 to 14 10 to 14 12 to 14 12 to 14 12 to 14 12 to 14 12 to 14 12 to 16 12 to 16 12 to 16 12 to 16 14 to 16 14 to 16
0.375 0.500 0.500 0.500 0.625 0.625 0.625 0.625 0.750 0.750 0.750 0.750 0.750 0.750 1.000 1.000 1.000 1.000 1.000 1.000 1.250 1.250 1.250 1.250 1.250 1.250
4 5 5 5 6 6 6 6 7 7 7 7 7 7 8 8 8 8 8 8 9 9 9 9 9 9
2 1 ⁄ 4 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 2 3 ⁄ 4 2 3 ⁄ 4 2 3 ⁄ 4 2 3 ⁄ 4
1 1 ⁄ 2 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4
3 ⁄ 4 7 ⁄ 8
15 ⁄ 16 a
1
2 2 2 2
1 1 ⁄ 16 1 1 ⁄ 8 1 3 ⁄ 16 1 1 ⁄ 4 1 5 ⁄ 16 1 3 ⁄ 8 1 7 ⁄ 16 1 1 ⁄ 2 1 9 ⁄ 16 1 5 ⁄ 8 1 11 ⁄ 16
3 3 3 3 3 3
2 1 ⁄ 4 2 1 ⁄ 4 2 1 ⁄ 4 2 1 ⁄ 4 2 1 ⁄ 4 2 1 ⁄ 4 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 2 3 ⁄ 4 2 3 ⁄ 4 2 3 ⁄ 4 2 3 ⁄ 4 2 3 ⁄ 4 2 3 ⁄ 4
3 1 ⁄ 2 3 1 ⁄ 2 3 1 ⁄ 2 3 1 ⁄ 2 3 1 ⁄ 2 3 1 ⁄ 2 3 3 ⁄ 4 3 3 ⁄ 4 3 3 ⁄ 4 3 3 ⁄ 4 3 3 ⁄ 4 3 3 ⁄ 4
1 3 ⁄ 4
1 13 ⁄ 16
1 7 ⁄ 8
1 15 ⁄ 16
2
2 1 ⁄ 16 a
2 1 ⁄ 8
2 3 ⁄ 16 a 2 1 ⁄ 4 2 3 ⁄ 8 a 2 1 ⁄ 2 a
a Helical flutes only. All dimensions are given in inches. Material is high-speed steel. Helical flute shell reamers with left-hand helical flutes are standard. Shell reamers are designed as a sizing or finishing reamer and are held on an arbor provided with driving lugs. The holes in these reamers are ground with a taper of 1 ⁄ 8 inch per foot. Tolerances: On diameter of reamer, 3 ⁄ 4 - to 1-inch size, incl., + .0001 to + .0005 inch; over 1-inch size, + .0002 to + .0006 inch. On length overall A and flute length B , 3 ⁄ 4 - to 1-inch size, incl., ± 1 ⁄ 16 inch; 1 1 ⁄ 16 - to 2-inch size, incl., ± 3 ⁄ 32 inch; 2 1 ⁄ 16 - to 2 1 ⁄ 2 -inch size, incl., ± 1 ⁄ 8 inch.
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