Made to OEM Specifications
1/2" Width Per Band
5/8" Width Per Band
7/8" Width Per Band
1-1/4" Width Per Band
3/8" Width Per Band
1" Width Per Band
0.140" Width Per Rib
Variable / Multi Speed Belts
Belts are NOT measured by diameter nor folding the belt in half. The most accurate way to measure the circumference of a v belt is with a v belt measuring tool or using a cloth tape measure (Not a steel tape measure or ruler). An additional option is to wrap a small diameter string/rope around the belt, then measure the length of the string. When measuring be sure to have the belt under slight tension and the cloth tape measure is tightly against the back of the belt. Also, keep in mind belts do stretch and unfortunately there is no specific value for how much a belt can stretch. You'll also need to measure the width and depth to determine which section v belt you have.
All A,B,C,D,E,AX,BX belts list the inside circumference measurement after the letter of the v belt part number. Example: A88 has a 88" inner circumference, then you add 2 inches for the A Section (Listed below) to obtain the outer circumference. If you measure the outer circumference, then you would subtract the number of inches based on the section you have (Listed below) to obtain the v belt number. This is also the same for the banded belts. Measure each individual band for banded belts to obtain the correct width.
Examples of how belt numbers are coded per section:
How fractional & wedge belt numbers are coded
All sections 3L,3V,5V,8V,3VX,5VX belts have the outside circumference after the number and letter(s). Example: Belt # 3V600 has a 60" outside circumference. Inside circumference are not measured for these sections. This is also for the banded belts. Measure each individual band for banded belts to obtain the correct width.
Measuring K Micro Rib Belts:
All sections K micro rib belts will have the outside circumference in front of the letter. The rib count will be the number after the letter.
Outside Circumference & Rib Count per section: