Varvel F RD02 Coaxial Reducer – Output Shaft Ø20 x 40 mm

What is the Varvel FRD02 coaxial gearbox?

The Varvel FRD02 is a helical gear coaxial gearbox designed by Varvel, a leading Italian power transmission manufacturer, to reduce the rotational speed of an electric motor while increasing the available output torque. This version is equipped with a Ø20x40 mm solid output shaft, an essential feature that gives it a transmission capacity suitable for medium-torque industrial applications. Robust, compact, and reliable, the Varvel FRD02 Ø20x40 mm naturally integrates into demanding industrial environments: conveyor lines, handling systems, packaging machines, automated process equipment, and even food processing facilities. Thanks to Varvel's proven design, recognized for decades in the European and global markets, it guarantees quiet operation, consistent transmission, and optimal longevity in continuous service, even under intensive use conditions.

How does the Varvel FRD02 work?

The Varvel FRD02 relies on a high-precision helical gear train to convert a high input speed into a reduced output speed, with a proportionally increased torque. Unlike conventional spur gears, the helical meshing used by Varvel ensures smooth and progressive transmission, distributing forces over several teeth simultaneously. This results in a significant reduction in vibrations, controlled noise levels, and minimized wear throughout the geared motor. The standardized input of the Varvel FRD02 allows direct coupling with a standard IEC electric motor, without additional adaptation parts, which considerably simplifies mechanical integration and reduces commissioning times.

What are the motor compatibilities of the FRD02?

The Varvel FRD02 has been designed to adapt to standardized electric motors IEC 56, IEC 63, IEC 71, and IEC 80, thus covering a wide range of motor powers commonly used in industry. The motor connection is made via a B5 or B14 flange depending on the chosen configuration, two widely used standards that guarantee total interchangeability with most motors on the market. The Varvel FRD02 also integrates an elastic coupling that absorbs starting shocks, compensates for slight misalignments, and protects both the gearbox and the motor against momentary overloads. This extended compatibility makes the FRD02 Varvel a particularly popular solution for fleet renewals or modernization of existing installations.

What are the dimensions of the B5 and B14 motor flanges?

The flange dimensions of the Varvel FRD02 scrupulously comply with IEC standards, guaranteeing full compatibility with motors on the market. For the B5 flange, the standardized diameters are Ø120 mm in IEC 56, Ø140 mm in IEC 63, and Ø160 mm in IEC 71. For the B14 flange, the diameters are Ø80 mm in IEC 56, Ø90 mm in IEC 63, Ø105 mm in IEC 71, and Ø120 mm in IEC 80. Compliance with these standardized dimensions by Varvel is a guarantee of reliability during assembly: no machining or adaptation is necessary, which reduces installation costs and the risk of error during assembly.

What reduction ratios are available?

The Varvel FRD02 stands out for its particularly wide reduction range, allowing it to cover a very broad spectrum of industrial applications with a single gearbox model. The available ratios are: 2.25 / 2.5 / 2.80 / 3.15 / 3.55 / 4 / 4.5 / 5 / 5.6 / 6.3 / 7.1 / 8 / 9 / 10 / 11.2 / 12.5 / 16 / 20 / 25 / 31.5 / 40 / 50. This exceptional range allows for very fine adjustment of the output speed according to the constraints of each industrial process, whether it is a slow, high-torque application or a moderately fast drive. The Varvel design office has optimized each ratio to ensure the best possible efficiency at each operating point.

What type of output shaft does the FRD02 have?

This version of the Varvel FRD02 is equipped with a Ø20 mm solid output shaft with a 40 mm bearing length, which represents a significantly higher transmission capacity than smaller diameter versions. This Ø20x40 mm shaft allows direct mounting of pulleys, sprockets, rigid or flexible couplings, without requiring specific intermediate parts. The robustness of this shaft, combined with the manufacturing quality of Varvel, guarantees optimal fatigue resistance even under repeated stress or in case of significant radial load. This is a major advantage for medium-torque industrial applications where the mechanical reliability of the transmission is paramount.

What mountings are available for the FRD02?

The Varvel FRD02 offers two distinct mounting modes to suit all installation configurations. The B3 foot mounting is the classic solution: the gearbox is placed and bolted onto a chassis or metal support, offering great stability and facilitating maintenance. The flange mounting allows direct attachment to the front face of the frame or machine, ideal when floor space is limited or the machine's design requires it. This mounting flexibility, designed by Varvel to meet real-world needs, facilitates both new installations and replacement operations on existing equipment, without structural modification of the frame.

What are the equivalents of the Varvel FRD02?

The Varvel FRD02 with Ø20x40 mm shaft is recognized as a reliable replacement solution for many coaxial gearboxes on the market. It is particularly compatible in terms of dimensions and interfaces with gearboxes from brands such as SEW-Eurodrive, Motovario, Bonfiglioli, Leroy-Somer, and STM, subject to verification of mechanical interfaces and available reduction ratios. Varvel's compliance with IEC standards is precisely what makes these equivalences possible: mounting dimensions, fixing holes, and shaft diameters are standardized, which considerably simplifies substitution operations without heavy mechanical intervention.

Technical conclusion

The Varvel FRD02 Ø20x40 mm is a versatile, robust coaxial gearbox perfectly suited for medium-torque industrial applications. The combination of a Ø20x40 mm output shaft, IEC B5/B14 compatibility, a reduction range up to 50, and two mounting modes makes it a complete, easy-to-integrate, and long-term reliable mechanical solution. This product perfectly illustrates Varvel's expertise, whose global reputation is based on manufacturing quality, component durability, and the ability to offer standardized solutions adapted to the most stringent requirements of modern industry.