When discussing V-belts, there are a number of geometric terms that are commonly used to describe their design and dimensions. Here are some of the most important:
- Width (Top Width): This is the measurement across the top of the belt, which is the widest part of the belt.
- Height (Depth): This is the measurement from the top of the belt to the bottom, or the thickness of the belt.
- Pitch Width: This is the width of the belt at the point where the tension cord is located. In some cases, it’s considered as the effective width of the belt.
- Angle: This is the angle of the V-shaped cross-section of the belt, which is typically around 40 degrees for classic V-belts but can vary for other types.
- Length: There are several ways to measure the length of a V-belt:
- Inside Length: The length measured along the inside edge of the belt.
- Pitch Length: The length measured at the pitch line, or where the tension cords are located.
- Outside Length: The length measured along the outside edge of the belt.
- Datum Circle: This is an imaginary circle that passes through the pitch line, and it’s where the pitch length is measured.
- Cord Line: This is the line along which the tension cords run, typically located near the pitch line.
These terms are used to define the physical characteristics of a V-belt and can be used to select the correct belt for a particular application. When ordering a V-belt, it’s important to specify these dimensions accurately to ensure the belt will fit properly and function as intended.