Wrapped V-Belt

Kaihong manufactures Wrapped V-Belts for agricultural machinery, compressors, mining equipment, industrial fans, pumps, construction machinery, diesel auxiliaries, and other drive systems exposed to dust, oil mist, vibration, shock, and continuous loads. With ISO9001 and ISO14001 certifications, Kaihong provides consistent dimensions, stable quality, OEM support, and reliable supply for distributors, machinery manufacturers, and aftermarket brands.

Product Advantages

Wrapped V-Belts use a fabric-covered construction that protects the rubber body from dust, gravel, mud, oil mist, and abrasion. The cover also helps control wear during repeated contact with pulley grooves.

The belt combines a V-shaped profile, rubber-dipped canvas wrapping, reinforced rubber layers, and polyester or aramid tensile cords. Polyester cords provide balanced strength, flexibility, dimensional stability, and cost efficiency. Aramid cords are available for high-power, high-speed, and severe shock-load applications requiring lower elongation.

Depending on the belt section and operating conditions, standard Wrapped V-Belts may transmit approximately 1.5–15 kW per belt, while heavy-duty or narrow-section designs may support approximately 5–45 kW per belt. These are reference ranges only. Final capacity depends on belt speed, pulley diameter, speed ratio, wrap angle, tension, alignment, service factor, and duty cycle.

Compared with raw-edge cogged belts, Wrapped V-Belts generally provide better protection against dust, gravel, mud, and surface abrasion. Cogged belts may offer greater flexibility on smaller pulleys.

Product Comparison

Wrapped V-Belts transmit power through friction and wedging force. They may slip during overload and are not suitable for applications requiring exact synchronization.

Construction

Protective Canvas Cover

The rubber-dipped polyester-cotton or polyester canvas cover protects the belt from dust, mud, gravel, oil mist, and repeated pulley contact.

Rubber Layers

The top, bottom, and compression rubber layers maintain the belt profile, absorb impact, and support flexibility. Compounds can be selected according to temperature, abrasion, oil mist, and load requirements.

Tensile Cord

Polyester cords are suitable for standard and heavy-duty applications. Aramid cords provide lower elongation and improved dimensional stability for high-power, high-speed, and shock-load applications.

V-Belt Profile

The V-shaped profile engages with the pulley groove to generate wedging force. Correct matching between the belt section and pulley groove is essential for stable operation and long service life.

Specifications

Standard V-Belt Sections

Narrow V-Belt Sections

*These are reference ranges, not guaranteed ratings. Final power capacity must be confirmed according to belt speed, pulley diameter, wrap angle, tension, service factor, temperature, and duty cycle.

Main Applications

Agricultural Machinery

Used in combine harvesters, balers, tillers, corn harvesters, tractors, and related equipment. The fabric cover helps protect the belt from field dust, soil, gravel, and vibration.

Compressors and Pumps

Suitable for air compressors, water pumps, generator sets, cooling tower fans, ventilation systems, and blowers operating under continuous loads.

Mining and Material Handling

Applied to crushers, mixers, conveyors, vibrating screens, and sand washing machines where abrasion and contamination resistance are important.

Construction and Diesel Equipment

Used in construction machinery, forklifts, diesel fan drives, auxiliary drives, and water pumps exposed to shock loads and changing operating conditions.

Industrial Machinery

Suitable for textile machines, woodworking equipment, saws, printing machinery, and industrial fans.

Pulley and Drive Requirements

Pulley grooves must be clean, correctly profiled, and free from sharp edges, excessive wear, oil, and embedded particles. Worn grooves can cause slipping, vibration, uneven wear, and overheating.

The actual minimum pulley diameter depends on the belt section, belt length, speed, power, tension, bending frequency, and equipment design. Buyers should confirm pulley compatibility before selecting a Wrapped V-Belt.

For multi-belt drives, use belts with the same section, length, construction, and preferably the same production batch. Do not mix old and new belts because uneven elasticity and length can cause unequal loading.

Ordering Information

Before ordering, confirm the belt section and length, original belt number or equipment model, pulley groove profile and diameter, center distance and installation space, operating speed and transmitted power, tensioning method, temperature and contamination level, shock load, and duty cycle.

Polyester cords are suitable for standard applications, while aramid cords are recommended for high power, high speed, severe shock loads, and low-elongation requirements. Original samples, drawings, or technical data can help Kaihong confirm the correct construction.

Installation and Maintenance

Reduce the center distance or release the tensioning mechanism before installation. Place the belt into the pulley grooves without forcing it or using sharp tools.

Set the tension according to the equipment manufacturer's specification. Incorrect tension may cause slipping, overheating, bearing overload, and premature wear.

Check pulley alignment before operation. After installation, run the equipment at low speed and inspect vibration, noise, tracking, and temperature.

Inspect regularly for cracks, glazing, frayed wrapping, exposed cords, edge wear, oil saturation, abnormal rubber dust, burning odor, and uneven tracking. Do not lubricate the belt, and keep pulley surfaces free from oil and grease.

Storage

Store belts in a cool, dry, clean, and ventilated location away from direct sunlight, ozone, heat, oil, fuel, solvents, and chemicals.

Keep belts in their natural loop shape. Avoid sharp folding, twisting, narrow hooks, heavy compression, and permanent deformation.

B2B Customization and Quality Control

Kaihong supports standard and narrow V-Belt sections, polyester or aramid tensile cords, custom lengths, rubber compounds, OEM replacement development, private labeling, laser marking, printed packaging, barcode labels, matched belt sets, sample testing, and batch traceability.

Under ISO9001 and ISO14001 management systems, Kaihong controls belt dimensions, cord position, rubber hardness, tensile strength, elongation, adhesion, heat aging, abrasion resistance, surface condition, and batch consistency.

Frequently Asked Questions

What Is a Wrapped V-Belt?

It is a V-shaped power transmission belt covered with a protective fabric layer and reinforced with rubber compounds and tensile cords.

How Much Power Can It Transmit?

Depending on the section and operating conditions, reference capacity ranges from approximately 1.5 kW to 45 kW per belt. Final ratings require application-specific calculation.

Why Is the Belt Wrapped?

The canvas cover protects the rubber body from abrasion, dust, mud, gravel, oil mist, and repeated pulley contact.

What Cord Materials Are Available?

Polyester cords are used for standard and heavy-duty applications. Aramid cords are available for high-power, high-speed, and severe shock-load applications.

Can It Replace a Synchronous Belt?

Only when approved by the equipment design. A Wrapped V-Belt may slip during overload and cannot provide positive synchronization.

Does It Require Lubrication?

No. Lubrication may reduce friction, cause slipping, and damage the belt.

Why Does It Fail Prematurely?

Common causes include incorrect tension, pulley misalignment, worn grooves, insufficient pulley diameter, excessive speed, overload, contamination, improper installation, and mixing old and new belts.