Varvel F RD52 Coaxial Gear Reducer – Output Shaft Ø40 x 80 mm

Varvel F RD52 Ø40 mm coaxial gearbox: power, precision, and industrial reliability

Designed to meet the demands of the most varied industrial applications, the Varvel F RD52 coaxial gearbox combines high transmission capacity, compactness, and great installation flexibility. Based on the expertise of Varvel, an Italian manufacturer specializing in mechanical transmission systems for over 60 years, this gearbox is developed to ensure consistent performance, even in the most demanding production environments.

Thanks to meticulous design, high-quality materials, and controls carried out at every stage of manufacturing, the F RD52 is a reliable solution for both machine builders and for maintenance or modernization operations of existing installations.

A compact design from the RD series

The Varvel F RD52 belongs to the RD series, a range of coaxial helical gearboxes renowned for its excellent mechanical efficiency. The coaxial alignment between the motor and the output shaft promotes smooth power transmission while limiting energy losses.

Its compact square casing facilitates its integration into confined spaces, while its modular design allows for numerous mounting configurations without altering the entire transmission. This architecture also simplifies maintenance operations and limits the number of references to stock.

Main technical characteristics

The Varvel F RD52 gearbox is equipped with precisely machined helical gears to ensure silent, smooth, and durable operation, while reducing vibrations and wear.

Its main characteristics are:

• Type: coaxial helical gearbox
• Series: Varvel RD52
• Output shaft: solid and keyed Ø40 × 80 mm
• Shaft height: 140 mm
• Maximum torque: 1,250 Nm
• 23 reduction ratios, from 2.25 to 63
• Compact square casing
• Oil bath lubrication, limiting maintenance operations
• ATEX version available for explosive atmosphere environments

Direct mounting on IEC motor

The letter F in the reference F RD52 indicates the presence of an IEC input flange, allowing direct mounting of the electric motor without an intermediate adapter. This design ensures precise alignment between the motor and the gearbox, while reducing installation time.

The gearbox is compatible with IEC 80, 90, 100, 112, 132, 160, and 180 motors, in both B5 and B14 versions.

Available flange dimensions are:

• IEC 80: B5 Ø200 mm – B14 Ø120 mm
• IEC 90: B5 Ø200 mm – B14 Ø140 mm
• IEC 100 and 112: B5 Ø250 mm – B14 Ø160 mm
• IEC 132: B5 Ø300 mm – B14 Ø200 mm
• IEC 160 and 180: B5 Ø350 mm – B14 Ø250 mm

This wide compatibility allows easy integration of the F RD52 on most standardized industrial motorizations.

Several mounting solutions

The Varvel F RD52 adapts to different installation constraints thanks to several mounting possibilities.

The B3 foot mounting is ideal for mounting on chassis or machine frames, while the output flange mounting ensures a rigid connection directly to the driven equipment.

Three flange diameters are available:

• Ø250 mm
• Ø300 mm
• Ø350 mm

Its standardized shaft height of 140 mm facilitates the replacement of an existing gearbox without modifying the mechanical layout of the machine.

A wide range of reduction ratios

With 23 reduction ratios, the F RD52 offers great configuration flexibility to precisely adapt the output speed to the needs of each application.

Available ratios cover a range between 2.25 and 63, allowing both high-speed drives and applications requiring high torque at low speed.

Available ratios:

2.25 – 2.82 – 3.55 – 4.46 – 5.18 – 5.61 – 7.09 – 7.72 – 8.92 – 10.06 – 11.22 – 12.37 – 14.17 – 15.44 – 17.84 – 20.12 – 22.44 – 25.26 – 28.34 – 31.76 – 35.68 – 44.68 – 63

Applications in numerous industrial sectors

Thanks to its robustness and versatility, the Varvel F RD52 equips numerous industrial installations.

It is notably found on:

• industrial conveyors;
• packaging machines;
• mixers and blenders;
• handling equipment;
• agricultural machines;
• machine tools;
• robotics and automation systems;
• installations related to renewable energies, such as photovoltaic trackers or certain wind power equipment.

Its smooth transmission and silent operation make it a particularly suitable solution for equipment operating continuously or subjected to intensive work cycles.

Why choose the Varvel F RD52 gearbox?

The Varvel F RD52 combines all the performance sought in a modern industrial gearbox:

• maximum torque of 1,250 Nm;
• 23 reduction ratios from 2.25 to 63;
• solid output shaft Ø40 × 80 mm;
• IEC 80 to 180 motor compatibility in B5 and B14;
• B3 foot mounting or by flange Ø250, Ø300 or Ø350 mm;
• shaft height of 140 mm compliant with industrial standards;
• oil bath lubrication requiring little maintenance;
• ATEX version available on request.

Thanks to its modular construction, its excellent mechanical efficiency, and Varvel manufacturing quality, the F RD52 is a reliable, durable, and high-performance solution for industrial installations requiring precise and secure power transmission.