Hamrock, Jacobson and Schmid1998 McGraw-Hill Selection of V-Belts Belt Cross Sections: A B.

Hamrock, Jacobson and Schmid©1998 McGraw-Hill

Selection of V-Belts

Belt Cross Sections: A

B

Designation A B3L 3/8 in 7/32 in4LAAX

1/2 in 5/16 in

5LBBX

21/32 in 3/8 in

CCX

7/8 in 17/32 in

D 1 1/4 in 3/4 in3VX 3/8 in 5/16 in5VX 5/8 in 17/32 in8V 1 in 7/8 in


Selection Guide

Types 3L, 4L, 5L:

Ideal for low horsepower (<3 hp) applications. Excellent for fans.

Types A, B, C, D:

Transmits more horsepower at a longer life than3L, 4L, and 5L belts. Suitable for clutching applications.

Types AX, BX, CX:

Notches provide for more aggressive gripping. For industrial applications of high horsepower.

Types 3VX, 5VX, and 8V:

Smaller wedge angle allows for larger horsepower transfer than with other belts; intended for high horsepower applications.


Belt Length Formula

+ +

L

Approx. Belt Length = 1.57(D1+D2) + 2L

D1D2


Sample Ratings : FHP (Fractional Horsepower) V-belts

Note: Horsepower ratings are not corrected for arc of contact, ratio, belt length or service factor.

3L 4L 5LPitch

Diameter ofsmaller

sheave at1750 rpm

HorsepowerRating

PitchDiameter of

smallersheave at1750 rpm

HorsepowerRating

PitchDiameter of


HorsepowerRating

1.251.5

1.752.02.53.03.54.04.55.0

0.090.150.230.290.430.550.610.670.730.78

1.251.52.02.53.03.54.04.55.05.56.0

0.090.140.290.600.881.171.371.491.611.701.78

2.22.53.03.43.94.44.95.45.96.46.97.4

0.360.450.711.071.521.952.262.392.502.592.682.71


Sample Ratings: Medium Duty Belts

A B C DPitch

Diameterof smallersheave at1750 rpm

HorsepowerRating

PitchDiameterof smallersheave at1750 rpm

HorsepowerRating


HorsepowerRating


HorsepowerRating

2.002.202.603.003.403.704.004.404.705.005.405.706.006.407.008.00

0.901.171.692.232.953.404.004.695.205.966.356.837.307.918.8110.22

3.003.403.804.204.605.005.405.806.206.607.007.408.008.609.009.40

1.582.473.344.195.106.167.218.229.2210.1911.1312.0613.3914.6615.4816.27

5.607.007.407.808.208.609.009.409.8010.2011.0012.0014.00

6.9412.0913.6215.1116.5617.9619.3220.6221.8823.0923.5327.8631.76

12.013.414.215.016.017.018.019.020.021.0

25.131.434.838.041.745.248.551.454.056.3



AX BX CXPitch

Diameter ofsmaller

sheave at1750 rpm

HorsepowerRating

PitchDiameter of


HorsepowerRating

PitchDiameter of


HorsepowerRating

2.002.202.603.003.403.704.004.404.705.005.405.706.006.407.008.00

1.241.582.252.903.533.994.465.155.676.186.847.347.828.469.39

10.88

3.003.403.804.204.605.005.405.806.206.607.007.408.008.609.009.40

3.724.625.506.367.198.089.19

10.2711.3412.3913.4114.4215.8917.3218.2319.13

5.607.007.407.808.208.609.009.409.80

10.2011.0012.0014.00

14.1018.3519.4920.6021.6623.1424.6126.0527.4428.7931.3734.3239.31

Sample Ratings: Medium Duty Notched Belts



Sample Ratings: Heavy Duty Belts


3VX 5VX 8VPitch

Diameter ofsmaller

sheave at1750 rpm

HorsepowerRating

PitchDiameter of


HorsepowerRating

PitchDiameter of


HorsepowerRating

2.152.302.452.602.953.103.303.604.454.704.955.255.956.857.95

10.55

1.371.631.892.152.753.013.343.855.255.656.056.537.639.01

10.6414.22

4.304.554.805.105.405.705.906.206.506.707.007.407.908.409.109.50

8.239.40

10.5511.9313.3014.6615.5616.8918.2219.1020.4122.1324.2626.3529.2330.84

12.3013.0013.8014.8015.8016.8017.8018.8019.8021.00

42.5847.2652.4858.7864.8170.5876.0681.2586.1291.55

Hamrock, Jacobson and Schmid1998 McGraw-Hill Selection of V-Belts Belt Cross Sections: A B.

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Transcript of Hamrock, Jacobson and Schmid1998 McGraw-Hill Selection of V-Belts Belt Cross Sections: A B.