Trapezoidal belts

The purpose of a V-belt (drive belt) is to transfer energy between two shafts whose axes are offset. The unique feature of this belt is its trapezoidal cross-section, which ensures a large friction area. The belt consists of a rubber core and polyester cord, which are covered with cotton or polyester fabric. The final layer is reinforced rubber. Due to the loads and tension that trapezoidal belts are subjected to, it is very important to choose high-quality belts, as they can break and damage the mechanism. Trapezoidal belts, also known as V-belts, are used in various industrial, agricultural and gardening equipment, etc. We sell reliable Czech trapezoidal belts of several types:

1. Standard: Z, A, B, C, 20, 25, D, E – comply with standard PN-ISO 4184.

Standard belt parameters:

– Maximum speed 30 m/s;

– Operating temperature from -30 to +60 °C;

– Resistant to lubricants.

1. Narrow profile: SPZ, SPA, SPB, SPC – complies with PN-ISO 4184.

Narrow profile belt parameters:

– Maximum speed 30 m/s;

– Operating temperature from -30 to +60 °C;

– Resistant to lubricants.

NARROW PROFILE (ISO 4184)

NORMAL (CLASSIC) PROFILE (ISO 4184)

Trapezoidal or V-shaped belts are the most common type of drive belt. Their purpose is to transfer energy between two shafts whose axes are offset from each other. A V-belt, or more precisely its rotational torque, transfers mechanical power from the drive to any other unit. The movement of the crankshaft activates the generator, radiator fan, compressor, water pump, etc. The distinctive feature of the V-shaped belt is its trapezoidal cross-section, which ensures a relatively large friction area. Trapezoidal belts (designed for use in conventional drives) are used in various industrial equipment and agricultural machinery.

UAB Almeida offers a range of 500 trapezoidal belts in different sizes.

Types and sizes of trapezoidal belts

Trapezoidal belts are divided into three main types: classic (classical V-belt), narrow profile (Wedge/Narrow V-belt) and low-power drive belts (light duty Fractional Horsepower belt (FHP)). Each type has its own specific marking. These markings are called profiles. The most common profiles for classic belts are 8, Z, A, B, 20*, 25*, D and E. Narrow profiles include SPZ, SPA, SPB, SPC and 3V, 5V, 8V. FHP profiles include 2L, 3L, 4L and 5L.

The belt consists of a rubber core and polyester cord, which are ‘wrapped’ in cotton or polyester fabric. The latter is covered with reinforced rubber. The length of the belt is measured according to: outer length (La), inner length (Li), longitudinal length (Lp). Belt dimensions: upper belt width (bo), longitudinal belt width (bp), height (h), longitudinal height (hp).

The classic belt is mainly used in general engineering and the automotive industry, as well as in agricultural machinery. It is economical, resistant to lubricants, ozone gases, abrasive materials, heat, antistatic and electrically conductive. Operating temperature range from – 35 0C to +70 0 C. Maximum belt linear speed – 30 m/s.

The narrow profile belt is narrower than the classic belt, which means lower operating and maintenance costs. It is used in both light and heavy industry, is more flexible than the classic belt, generates less heat and is more resistant to cracking. It is also resistant to lubricants, heat, dust and abrasive materials, is electrically conductive and antistatic. Operating temperature range: -30°C to +90°C.

FHP is used in equipment with a power rating of no more than 1 HP. That is, low-power household appliances, lawn mowers. FHP is durable and economical. Operating temperature range: -35°C to +100°C.

*Used only in agricultural machinery.