V-Belt Type: Top Width: Height: Angle: A: 1/2″ 5/16″ 40° B: 5/8″ 13/32″ 40° 3VX: 3/8″ 21/64″ 40° 5VX: 5/8″ 35/64″ 40° There are several industry standards for the types and sizes of v-belts. Each type features the basic trapezoidal shape but has different dimensions. Standard v-belt. Standard v-belts are common in power transmission applications. These v-belts come in various types, as shown in Table 1. Each type varies from one another with respect to its How Does It Work? Types Of, Uses. V-Belts. Introduction. This article contains all the information you need to know about V-Belts. Read further to learn more about topics such as: What is a V-Belt? Overview of Belt Drives. V-Belt Construction. V-belt Geometry Terminologies. Types of V-Belts. And much more… Chapter 1: What is a V-Belt? In this article we'll review some V- belt basics to help you make better sense of which belt to use in a given ap- plication to make your belt drives last longer, run more eficiently, and save you downtime and money. Size Isn't Everything. Take a look at the accompanying chart (Figure 1). Classical. This standard was developed in the 1930s. It now comes in six sizes (A, B, C, D, E and Z). Narrow. Each of these belts has a 1/2-inch top width and 50-inch circumference. However, notice the differences in cord materials, body compounds, cover configurations, temperature ranges and application requirements. Despite their outward similarities, each of these belts is designed for a distinct purpose. 'A', 'B', 'C', 'D' and 'E'. The categorization of this is based on the cross sectional size of the belt and the amount of power to be transmitted by the belt. The dimensions of various sections of the V-belt are shown below. The included angle of the V-Belts is 40 Degrees. Simply measure from the 1" mark across the top of the belt. Common widths range from ½" to as wide as 1½" to indicate whether you need anything from an A belt all the way up to an E belt. Measuring the V-Belt Length. There are a few different ways you can measure the length of a V-belt. xqDb.