# How do you read V belt numbers?

## How do you read V belt numbers?

Automotive belts start with either 4L (12.5mm wide) or 3L (9.5mm). The number following it is the outside length of the belt in tenths of inches. The inside length of the belt is typically 2″ less for a 4L belt, and 1-1/2″ less for a 3L belt.

### What size fan belt do I need?

Use a cloth measuring tape (not a steel one) and wrap it around the outside of the belt. You also use a thin string to take this measurement and place it on a steel tape to get the correct length. Next, for “A” Belts (1/2” width) subtract two-inches from the outside measurement to select the correct V-belt.

What is the fan belt number?

This number represents the length of the inside of the fan belt (as opposed to the number in the standard automotive belt, which represents the outside circumference). For example, if the number is 46, that means the inside circumference of the belt is 46 inches.

How do I read my Dayco belt number?

On the scale underneath the moveable pulley, the outer lines on the blue plastic will indicate the length of the belt in millimetres and inches. In this example the number 2045, which indicates a belt length of 2045 millimetres.

## What is a 5L belt?

5L Belt = 5/8 (.625) Inches Width x 3/8 (.375) Height. 3V & 3VX Belts = 3/8 (.375) Inch Width x 5/16 (.3125) Height.

### How do you read a serpentine belt code?

EXAMPLE: 6PK1003 » 6 – This indicates the number of ribs on the belt; therefore, this is a 6-rib belt. » PK – The “P” indicates a metric designation, and the “K” indicates the belt is automotive per SAE J1459. » 1003 – This is the effective length of the belt expressed in millimeters.

How do I measure my belt size?

Measure from center of one shaft to the center of the other shaft, then double it. Now take you wrap and add it the the doubled center distance and you have you belt length. Note that if you are using pitch diameters on a v-belt sheave you will need to use the pitch diameter on your v-belt.

Is the alternator belt the same as the serpentine belt?

Sometimes called a fan belt, alternator belt, or accessory drive belt, the serpentine belt is spun by the engine crankshaft and, in turn, spins, or “drives”, the accessories. Cars of the past relied on multiple drive belts, but today’s vehicles (usually) count on just one, the serpentine belt.

## What does 4L mean on a belt?

4L Belt = The Outside Circumference (OC) – Minus 2 Inches. ( Example 4L320 = 30 Inch Inside Circumference) 5L Belt = The Outside Circumference (OC) – Minus 3 Inches. (

### What is a Gilmer belt?

A gilmer belt was a brand or trade name for a mechanical belt used for transferring power between axles in a machine. Gilmer belts use trapezoidal teeth to engage matching grooves on toothed pulleys in order to maintain synchronicity between moving parts.

# How do you read V-belt numbers?

## How do you read V-belt numbers?

The number following it is the outside length of the belt in tenths of inches. The inside length of the belt is typically 2″ less for a 4L belt, and 1-1/2″ less for a 3L belt. An example would be 4L460, which would be 46″ long outside, 44″ inside.

## How do you measure the width of a V-belt pulley?

Measuring Pulley Width Measure from side to side across where your belt sits, from outside edge to outside edge.

What is V-belt pitch?

Belt Pitch Length: The pitch length of a belt is the length at the pitch diameter of the sheaves being used. The pitch length is obtained by adding the pitch circumference of one sheave to twice the center distance between two equal diameter sheaves at a specified tension. [More recently changed to datum length.]

### How are V belts specified?

The length of a V-belt can be specified in several ways, including outside length, effective length, and pitch (or datum) length. Alternatively, the pitch length is measured at the pitch diameter of the sheaves. Both effective length and pitch length are measured with the belt tensioned by a specified amount.

### Is standard for V-belts?

This International Standard defines terms relating to V-belt drives, V-belts, hexagonal belts, joined V-belts and the corresponding V-grooved pulleys, V-ribbed belt drives, V-ribbed belts and V-ribbed pulleys, as well as the corresponding symbols.

What are three types of standard V-belts?

There are three common V belt types: Classical V-belt (classified by their dimensions from A to E), Narrow V series (classified by their dimensions 3V, 5V, and 8V), and light duty Fractional Horsepower belt (classified by their dimensions 2L, 3L, 4L, 5L). Their counterpart cogged belt is classified by the letter X.

#### What are the different types of V belts?

There are three common V belt types: Classical V-belt (classified by their dimensions from A to E), Narrow V series (classified by their dimensions 3V, 5V, and 8V), and light duty Fractional Horsepower belt (classified by their dimensions 2L, 3L, 4L, 5L).