V-Belts V-Belt Sizing Guide Belt size refers to the pulley groove width (B) for belts under and equal to 1/2”. Belt size refers to the belt top width (A) for belts over 1/2”.
●
●
BELT SIZE (in) (mm)
A BELT TOP WIDTH (in) (mm)
B PULLEY GROOVE WIDTH (in) (mm)
3/8
9.5
0.422
10.72
0.380
9.65
1/2
12.7
0.547
13.89
0.500
12.70
11/16
17.5
0.688
17.48
0.625
15.88
3/4
19.1
0.750
19.05
0.690
17.53
15/16
23.8
0.938
23.83
0.878
22.30
1 1/16
27.0
1.062
26.97
1.003
25.48
1/4
31.8
1.297
32.94
1.253
31.83
1
V-Belt Maintenance Tips Keep the V-Belts on your engine in good condition. V-Belt failure can cause malfunctions of the charging system and overheating. Regularly do the following: ● Check for cracked, worn, or frayed belts. On matched belt sets, always replace the complete set. If just one belt is bad, uneven load on belts, pulleys, bearings, and shafts can occur. ● Check pulley grooves to make sure they are not worn, damaged, or aligned incorrectly. Poor belt to pulley contact will result in rapid wear and short life. Using a tension gauge, check belt tension after installation and at every oil change. Adjust to ensure proper belt seating.
458
