V-belts and power belts

Classic V-belts DIN 2215

Number of belts: 10
kW per belt: 8.4
Cost per belt: 34
Cost per set: 340
Cost of pulley: 710
Total cost: 1050

100 %

Narrow V-belts DIN 7753

Number of belts: 7
kW per belt: 12.1
Cost per belt: 44
Cost per set: 308
Cost of pulley: 490
Total cost: 798

75 %

High-performance narrow V-belts

Number of belts: 5
kW per belt: 17.7
Cost per belt: 52
Cost per set: 260
Cost of pulley: 350
Total cost: 610

58 %

The main difference between a kraftband and a single drive belt lies in the design and the specific application benefits:

1. Construction

Kraftband: Here, several individual belts are firmly connected to each other by a flexible cover layer. This design ensures high transverse rigidity and eliminates length differences between the individual belts.

Single belt: Each belt is independent, without a connecting layer. This makes them lighter and more flexible to handle.

2. Running behaviour

Kraftband: Thanks to the fixed connection of the individual belts, the kraftband offers particularly smooth running behaviour, especially with large centre distances and applications with high vibration loads.

Single belt: Individual belts can run less stably with larger centre distances or under vibrations, as they work independently of each other.

3. Assembly

Kraftband: Die Montage eines Kraftbands kann aufwendiger sein, da es schwerer ist und als einheitliches Bauteil gehandhabt werden muss.

Single belt: Single belts are easier to install due to their lower weight and flexibility, especially in tight or hard-to-reach areas.

To summarise, the kraftband offers advantages in demanding applications due to its greater stability, while single belts may be preferred for simple, lightweight installations.

1. Structure and surface

Open-flank V-belt: The side faces (flanks) of the belt are not sheathed, but consist of open, precisely ground material. These flanks ensure direct contact with the pulley and ensure high friction and therefore optimum power transmission. It is often provided with an additional coating or a special rubber to minimise wear and heat development.

Coated V-belt: The entire outer surfaces, including the flanks, are coated with a layer of fabric. This coating protects the belt from external influences such as dust, dirt and moisture and increases the belt's service life.

2. Power transmission

Open-flank V-belt: Thanks to the ground flanks, it achieves very high friction and is therefore ideal for applications with high torques and tight bending radii. It runs more efficiently as slippage is minimised.

Coated V-belt: The power transmission is slightly less efficient as the sheathing offers a lower coefficient of friction. In return, it offers a more even and gentler transmission for less demanding applications.

3. Areas of application

Open-flank V-belt: Used in high-performance applications where maximum efficiency and precise power transmission are required, e.g. in machines with high speeds or highly variable loads.

Coated V-belt: Suitable for robust, durable applications where protection against environmental influences and smooth running are paramount, e.g. in agricultural and construction machinery.

Open-flank V-belts score highly in terms of efficiency and power transmission, while wrapped V-belts impress with their protection and durability. The choice depends on the specific requirements of the application.

Moulded toothed drive belts are used to ensure precise, efficient and smooth power transmission in a wide range of applications. They offer special advantages thanks to their tooth structure, which has a positive effect on performance and versatility.

High power transmission with compact drives: The toothing enables better power transmission with the same profile cross-section compared to conventional belts. This means that smaller pulleys can be used and the entire drive can be made more compact.

Applications with high speeds: Due to their special profile shape, moulded-tooth drive belts run more smoothly and enable high speeds with minimal vibrations and noise.

Increased efficiency: The toothing reduces energy loss due to slippage and ensures direct transmission of the movement force. This is particularly important in industrial applications where efficiency plays a major role.

Applications with small pulley diameters: Thanks to the flexibility of the toothing, they can also be used on small pulleys without material fatigue or loss of performance.

Wide range of applications: They are frequently used in machine tools, conveyor systems, pumps, automobiles and agricultural equipment. They are also used in household appliances and medical devices where precise and quiet drives are required.

Quiet and low-vibration operation: The toothing ensures an even distribution of forces and low-vibration operation, which increases the service life of belts and neighbouring components.

Moulded toothed drive belts are ideal for applications where high efficiency, compact design, quiet operation and precise power transmission are required. They are used in demanding machines, automobiles and other technical devices where reliability and performance are crucial.