Machinery's Handbook, 31st Edition
1898 RETAINING RINGS Table 1. (Continued) American National Standard Metric Tapered Retaining Rings —Basic External Series.—3AM1 ANSI/ASME B27.7-1977 (R2017) Ring Groove Ring Groove
Shaft Diam
Thick- ness
Free Dia.
Free Dia.
Thick- ness
Dia.
Width Depth Edge Margin
Dia.
Width Depth Edge Margin
G W d ref. Z min.
G W d ref. Z min.
S
D t
S
D t
4 5 6 7 8 9
3.60 0.25 3.80 0.32 0.1 4.55 0.4 4.75 0.5 0.13 0.4 0.3 5.45 0.4 5.70 0.5 0.15 0.5 6.35 0.6 6.60 0.7 0.20 0.6 7.15 0.6 7.50 0.7 0.25 0.8 8.15 0.6 8.45 0.7 0.28 0.8 9.00 0.6 9.40 0.7 0.30 0.9
36 33.25 1.3 33.85 1.4 1.06 3.2 38 35.20 1.3 35.8 1.4 1.10 3.3 40 36.75 1.6 37.7 1.75 1.15 3.4 42 38.80 1.6 39.6 1.75 1.20 3.6 43 39.65 1.6 40.5 1.75 1.25 3.8 45 41.60 1.6 42.4 1.75 1.30 3.9 46 42.55 1.6 43.3 1.75 1.35 4.0 48 44.40 1.6 45.2 1.75 1.40 4.2 50 46.20 1.6 47.2 1.75 1.40 4.2 52 48.40 2.0 49.1 2.15 1.45 4.3 54 49.9 2.0 51.0 2.15 1.50 4.5 55 50.6 2.0 51.8 2.15 1.60 4.8 57 52.9 2.0 53.8 2.15 1.60 4.8 58 53.6 2.0 54.7 2.15 1.65 4.9 60 55.8 2.0 56.7 2.15 1.65 4.9 62 57.3 2.0 58.6 2.15 1.70 5.1 65 60.4 2.0 61.6 2.15 1.70 5.1 68 63.1 2.0 64.5 2.15 1.75 5.3 70 64.6 2.4 66.4 2.55 1.80 5.4 72 66.6 2.4 68.3 2.55 1.85 5.5 75 69.0 2.4 71.2 2.55 1.90 5.7 78 72.0 2.4 74.0 2.55 2.00 6.0 80 74.2 2.4 75.9 2.55 2.05 6.1 82 76.4 2.4 77.8 2.55 2.10 6.3 85 78.6 2.4 80.6 2.55 2.20 6.6 88 81.4 2.8 83.5 2.95 2.25 6.7 90 83.2 2.8 85.4 2.95 2.30 6.9
10
11 10.00 0.6 10.35 0.7 0.33 1.0 12 10.85 0.6 11.35 0.7 0.33 1.0 13 11.90 0.9 12.30 1.0 0.35 1.0 14 12.90 0.9 13.25 1.0 0.38 1.2 15 13.80 0.9 14.15 1.0 0.43 1.3 16 14.70 0.9 15.10 1.0 0.45 1.4 17 15.75 0.9 16.10 1.0 0.45 1.4 18 16.65 1.1 17.00 1.2 0.50 1.5 19 17.60 1.1 17.95 1.2 0.53 1.6 20 18.35 1.1 18.85 1.2 0.58 1.7 21 19.40 1.1 19.80 1.2 0.60 1.8 22 20.30 1.1 20.70 1.2 0.65 1.9 23 21.25 1.1 21.65 1.2 0.67 2.0 24 22.20 1.1 22.60 1.2 0.70 2.1 25 23.10 1.1 23.50 1.2 0.75 2.3 26 24.05 1.1 24.50 1.2 0.75 2.3 27 24.95 1.3 25.45 1.4 0.78 2.3 28 25.80 1.3 26.40 1.4 0.80 2.4 30 27.90 1.3 28.35 1.4 0.83 2.5 32 29.60 1.3 30.20 1.4 0.90 2.7
34 31.40 1.3 32.00 1.4 1.00 3.0 95 88.1 2.8 90.2 2.95 2.40 7.2 35 32.30 1.3 32.90 1.4 1.05 3.1 100 92.5 2.8 95.0 2.95 2.50 7.5 All dimensions are in millimeters. Sizes − 4, − 5, and − 6 are available in beryllium copper only. These rings are designated by series symbol and shaft diameter, thus: for a 4 mm diameter shaft, 3AM1-4; for a 20 mm diameter shaft, 3AM1-20; etc. Ring Free Diameter Tolerances: For ring sizes − 4 through − 6, +0.05, − 0.10 mm; for sizes − 7 through − 12, +0.05, − 0.15 mm; for sizes − 13 through − 26, +0.15, − 0.25 mm; for sizes − 27 through − 38, +0.25, − 0.40 mm; for sizes − 40 through − 50, +0.35, − 0.50 mm; for sizes − 52 through − 62, +0.35, − 0.65 mm; and for sizes − 65 through − 100, +0.50, − 0.75 mm. Groove Diameter Tolerances: For ring sizes − 4 through − 6, − 0.08 mm; for sizes − 7 through − 10, − 0.10 mm; for sizes − 11 through − 15, − 0.12 mm; for sizes − 16 through − 26, − 0.15 mm; for sizes − 27 through − 36, − 0.20 mm; for sizes − 38 through − 55, − 0.30 mm; and for sizes − 57 through − 100, − 0.40 mm. Groove Diameter F.I.M. (full indicator movement) or maximum allowable deviation of concen tricity between groove and shaft: For ring sizes − 4 through − 6, 0.03 mm; for ring sizes − 7 through − 12, 0.05 mm; for sizes − 13 through − 28, 0.10 mm; for sizes − 30 through − 55, 0.15 mm; and for sizes − 57 through − 00, 0.20 mm. Groove Width Tolerances: For ring size − 4, +0.05 mm; for sizes − 5 and − 6, +0.10 mm, for sizes − 7 through − 38, +0.15 mm; and for sizes − 40 through − 100, +0.20 mm. Groove Maximum Bottom Radii,R : For ring sizes − 4 through − 6, none; for sizes − 7 through − 18, 0.1 mm; for sizes − 19 through − 30, 0.2 mm; for sizes − 32 through − 50, 0.3 mm; and for sizes − 52 through − 100, 0.4 mm. For manufacturing details not shown, including materials, see ANSI/ ASME B27.7-1977 (R2017).
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