Machinery's Handbook, 31st Edition
Classical V-Belts 2575 Table 8. Classical V-Belt Standard Datum Length ANSI/RMA IP-20, 1988
Standard Datum Lengths
Permissible Deviations from Std. Datum Length
Standard Length Designation a
Matching Limits for One Set
Cross Section A, AX B, BX C, CX
D
26 31 35 38 42 46 51 55 60 68 75 80 81 85 90 96 97
27.3 32.3 36.3 39.3 43.3 47.3 52.3 56.3 61.3 69.3 75.3 81.3 86.3 91.3 97.3
… … … +0.6, − 0.6 … … … +0.6, − 0.6
0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.30 0.45 0.45 0.45 0.45 0.45 0.45 0.60 0.60 0.60 0.60 0.90 0.75 0.75 0.75 0.90
36.8 39.8 43.8 47.8 52.8 56.8 61.8 69.8 76.8
… … +0.6, − 0.6 … … +0.7, − 0.7 … … +0.7, − 0.7 … … +0.7, − 0.7
53.9
… +0.7, − 0.7
… … +0.7, − 0.7
62.9 70.9 77.9 83.9 87.9 92.9
… +0.7, − 0.7 … +0.7, − 0.7 … +0.7, − 0.7 … +0.7, − 0.7 … +0.7, − 0.7 … +0.8, − 0.8 … +0.8, − 0.8 … +0.8, − 0.8 … +0.8, − 0.8
… … … +0.7, − 0.7
… 82.8
86.8 91.8
… 98.9
… 98.8
… … +0.8, − 0.8
105 112 120 128 144 158 173 180 195 210 240 270 300 330 360 540 390 420 480 600
106.3 113.3 121.3 129.3
106.8 113.8 121.8 129.8
107.9 114.9 122.9 130.9 146.9 160.9 175.9 182.9 197.9 212.9 240.9 270.9 300.0
123.3 131.3 147.3 161.3 176.3 183.3 198.3 213.3 240.8 270.8 300.8 330.8 360.8 390.8 420.8
+0.8, − 0.8 +0.8, − 0.8 +0.8, − 0.8 +1.0, − 1.0 +1.0, − 1.0 +1.0, − 1.0 +1.1, − 1.1 +1.1, − 1.1 +1.3, − 1.3 +1.6, − 1.6 +1.6, − 1.6 +2.0, − 2.0 +2.0, − 2.0 +3.3, − 3.3 +2.0, − 2.0 +3.3, − 3.3 +3.3, − 3.3 +3.3, − 3.3 +3.3, − 3.3
… 145.8 … 159.8 … 174.8 … 181.8 … 196.8 … 211.8 … 240.3 … 270.3 … 300.3
… … 330.9 … … 380.9 … … 390.9 … … 420.9
… … … 540.8
… … … 480.8 … … … 600.8 … … … 660.8
660 0.90 a To specify belt size use the Standard Length Designation prefixed by the letter indicating the cross section, e.g., B90. All dimensions in inches.
Sheave Dimensions: Groove angles and dimensions for sheaves and the face widths of sheaves for multiple belt drives are given in Table 9, along with various tolerance values.
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online