V-belt

V-belts are one of the most widely used power transmission belts today, commonly applied in air compressors, industrial fans, pumps, processing machines, and manufacturing equipment. With various types such as classical V-belts, cogged V-belts, narrow V-belts (SPZ–SPC), and hexagonal belts, V-belts meet a wide range of requirements from light-duty to heavy-duty industrial applications.

If you are looking for an efficient, cost-effective, and easy-to-maintain power transmission solution, Belota is pleased to introduce our V-belt product range.

What Is a V-Belt?

A V-belt (also known as a classical belt or wedge belt) features a trapezoidal cross-section, specifically designed to transmit power and torque between rotating shafts. Thanks to its unique profile, the belt fits tightly into the pulley groove, ensuring stable transmission and high efficiency with minimal slippage. V-belts are engineered to deliver reliable torque transfer in various industrial drive systems.

>> See Also: Rubber Belts – Durable Power Transmission Solutions

Structure of a V-Belt

A typical V-belt consists of the following layers:

• Compression rubber layer: Located at the bottom of the belt, made from synthetic rubber. This layer absorbs vibration and generates friction when contacting the pulley groove.

• Tensile cord layer: The core of the belt, composed of polyester, nylon, or aramid (Kevlar) cords. It provides high tensile strength, limits elongation, and reduces heat buildup during operation.

• Outer protective layer

  • Rubber cover: Protects the tensile cords from dust, oil, grease, and UV exposure.

  • Fabric cover (optional): Enhances abrasion resistance, improves grip, and extends belt service life.

Key Advantages of V-Belts

• V-shaped cross-section: Ensures firm pulley engagement, reduces slippage, and improves torque transmission.

• Space-saving design: Narrower than flat belts, ideal for compact machine layouts.

• Low tension requirement: Operates efficiently without excessive belt tension, reducing wear and extending service life.

• Optimal operating speed range: Performs best between 300 and 2,130 m/min, suitable for many industrial applications.

• High power transmission capacity: Multiple belts can be installed in parallel for increased load handling.

Standard V-Belt Sizes

V-belts are manufactured in standardized sizes to match various pulley systems and power requirements.

Classical V-Belts (Z, A, B, C, D, E)

• Z: approx. 10 mm wide – 6 mm high

• A: approx. 13 mm wide – 8 mm high

• B: approx. 17 mm wide – 11 mm high

• C: approx. 22 mm wide – 14 mm high

Narrow V-Belts (SPZ, SPA, SPB, SPC)

• SPZ: 10 mm wide – 8 mm high

• SPA: 13 mm wide – 10 mm high

• SPB: 16 mm wide – 13 mm high

Belt length: Typically ranges from 400 mm to 6,000 mm, depending on application and belt type.

Common Types of V-Belts

Classical V-Belts

• Codes: Z, A, B, C, D, E

• Features: Standard trapezoidal profile, smooth inner surface

• Applications: Industrial machines, air compressors, fans, pumps

• Advantages: Easy replacement, cost-effective, smooth operation

Cogged (Notched) V-Belts

• Codes: ZX, AX, BX, CX

• Features: Internal cogs improve flexibility and grip

• Applications: High-speed or high-load machinery

• Advantages: Reduced slippage, better heat dissipation, longer service life

Narrow High-Performance V-Belts

• Codes: SPZ, SPA, SPB, SPC (smooth) or XPZ, XPA, XPB, XPC (cogged)

• Features: Narrow profile with higher power transmission efficiency

• Applications: Heavy industrial machinery, HVAC systems, CNC machines

• Advantages: High efficiency, reduced pulley wear

Hexagonal (Double-Sided) V-Belts

• Codes: AA, BB, CC

• Features: Hexagonal cross-section, capable of transmitting power on both sides

• Applications: Agricultural machinery, multi-pulley drive systems

• Advantages: Multi-directional power transmission, flexible installation

Joined V-Belts

• Features: Multiple V-belts joined together into a single band

• Applications: Heavy-duty machinery such as crushers, rolling mills

• Advantages: Extremely high load capacity, reduced vibration, stable operation

Applications of V-Belts

V-belts are widely used across many industries thanks to their reliable power transmission and durability:

• Industrial drive systems: Air compressors, pumps, industrial fans, motor–pulley drives

• Manufacturing and processing: Conveyors, woodworking machines, mixers, textile and packaging machinery

• Agricultural equipment: Tractors, harvesters, irrigation pumps

• Automotive applications: Alternators, air conditioning compressors, power steering systems

• HVAC systems: Centrifugal fans, ventilation and industrial air conditioning

• Metalworking machinery: CNC machines, grinders, lathes requiring precision and low vibration

Where to Buy Genuine V-Belts?

BELOTA Co., Ltd. is a trusted distributor of genuine V-belts, including section E belts, from leading brands such as Megadyne, Optibelt, Gates, Bando, and Mitsuboshi.

We guarantee:

• Genuine products with reliable quality

• Wide range of V-belt sizes and specifications

• Competitive pricing and nationwide delivery

• Technical support to help you select the correct belt

📞 For inquiries or quotations, please contact BELOTA via hotline +84 917 657 946 for fast and professional support.

>> See More: Drive Belts – Reliable Power Transmission Solutions