Varvel F RD42 Coaxial Gearbox – Output Shaft Ø40 x 80 mm

Ref: F RD42 Ø40

The Varvel FRD42 coaxial gearboxbelongs to the RD series, a range developed by Varvel, an Italian manufacturer recognized for its expertise in mechanical transmission systems for industrial applications. It transforms the high speed of an electric motor into a slower rotational movement, while increasing the available torque, in order to meet the performanceand reliabilityrequirements of modern installations.

Equipped with a solid keyed output shaft Ø40 × 80 mm, the FRD42guarantees excellent resistance to radial forcesas well as high transmission capacity. This design facilitates the mounting of many mechanical components such as pulleys, sprockets, friction wheelsor rigid couplings. Its 130 mm shaft height, compliant with industrial standards, allows for simple integration on both new machines and as a replacement for an existing gearbox.

Capable of transmitting a maximum torque of 650 Nm, the Varvel FRD42is offered with 23 reduction ratios, from 2.25 to 63. This wide range of ratios allows it to meet a wide variety of industrial applications, including low-speed conveyors, continuously operating machines, variable speed equipmentor installations subjected to repetitive loads.

The motor is mounted directly on a standardized IEC input flange, available in B5 or B14 versionfor IEC sizes 71, 80, 90, 100, 112 and 132. This configuration eliminates the need for adaptation parts and ensures precise alignmentbetween the motor and the gearbox upon installation. The integrated elastic couplingcontributes to the protection of the transmission by absorbing starting shocksand torque variationsthat may occur during operation.

To adapt to different mounting configurations, the FRD42can be installed on B3 feetfor mounting on a chassis or machine frame, or by output flange Ø200 mm, Ø250 mm or Ø300 mmfor direct and particularly rigid mounting on the driven machine.

Do you want to replace a gearbox of another brand? Send us a photo of your equipmentas well as its nameplate. Our specialists will identify a technical equivalentand guide you to the Varvel FRD42 gearboxor the most suitable model in the range for your application.

  • Power

    650 Nm

Documentation technique :

The Varvel F RD42 Ø40mm coaxial gearbox — Performance and versatility for your installation

In the world of industrial power transmission, Varvel stands out as an indispensable reference. With over 60 years of expertise in manufacturing gearboxes, gearmotors, and transmission components, this Italian manufacturer has established itself across all major global industrial markets. Every product leaving its workshops is the result of rigorous development, demanding material selection, and quality controls applied throughout the manufacturing process. Whether for a design office project or on-site maintenance, Varvel represents a guarantee of proven reliability under real operating conditions.

The RD series perfectly illustrates this level of excellence. It brings together helical gear coaxial gearboxes whose inline arrangement guarantees optimal mechanical efficiency and great adaptability to installation constraints. The F RD42 stands out in this range for its compact square casing, which allows integration into confined spaces, and its modular architecture, which considerably simplifies adaptations according to encountered configurations.

Technical characteristics of the FRD42 Ø40mm gearbox

The Varvel F RD42 gearbox is based on a precision-cut helical gear train, which delivers smooth and quiet transmission, limiting temperature increases and controlling wear over time. Its technical characteristics are as follows:

  • Type: In-line helical gear coaxial gearbox
  • Brand / Series: Varvel — RD Series, size 42
  • Output shaft: solid, keyed, Ø40x80mm
  • Shaft height: 130mm
  • Maximum output torque: 650 Nm
  • Number of available reduction ratios: 23 ratios (from 2.25 to 63)
  • Housing: square shape, compact construction
  • Lubrication: oil bath, low maintenance
  • ATEX version: available on request for explosive atmospheres

Motor compatibility and IEC input flanges

The letter F in the reference F RD42 indicates the integration of a direct IEC input flange, allowing the mounting of a standardized electric motor without the need for an intermediate part. Compatibility extends to motor sizes IEC 71, 80, 90, 100, 112 and 132, in both B5 and B14 configurations.

Size IEC 71 connects in B5 Ø160mm or B14 Ø120mm. Size IEC 80 accepts a B5 Ø200mm or B14 Ø120mm flange. For IEC 90, dimensions increase to B5 Ø200mm and B14 Ø140mm. Sizes IEC 100 and IEC 112 share the same interface dimensions: B5 Ø250mm and B14 Ø160mm. IEC 132 connects in B5 Ø300mm and B14 Ø200mm. This compatibility spectrum covers most industrial motorizations.

Mounting and installation

The F RD42 offers two mounting methods to meet the requirements of each configuration. Foot mounting is suitable for installations on welded frames or chassis. Output flange mounting is preferred when a rigid and direct assembly to the receiving machine is necessary, with three available diameters: Ø200mm, Ø250mm or Ø300mm. The 130mm shaft height, aligned with current industrial standards, allows this gearbox to replace existing equipment without having to redesign the mechanical layout.

23 available reduction ratios

Few gearboxes of this size offer such a wide range of choices. The 23 reduction ratios of the F RD42 cover a range from 2.25 to 63: 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 — 63.00. This amplitude makes it possible to identify the ideal ratio for each application, whether for a slow, high-torque drive or a transmission operating at intermediate speed.

What applications use the F RD42 coaxial gearbox?

The Varvel F RD42 integrates into a wide variety of industrial environments. The food industry adopts it for its conveyor lines, mixers, and packaging systems, where production continuity and hygiene constraints demand uncompromising equipment. The machine tool and agriculture sectors use it for robust transmissions subjected to intense work cycles. In the field of energy—photovoltaic trackers, wind power installations—its longevity and consistency are sought after. It also finds its place in automation systems, robotics cells, and handling equipment, where any irregularity in transmission is excluded.

Key takeaways about the Varvel F RD42 gearbox

The F RD42 packs all the qualities expected of a modern industrial gearbox into a compact footprint: a maximum output torque of 650 Nm, 23 reduction ratios between 2.25 and 63, IEC compatibility from size 71 to 132 in B5 and B14, foot or flange mounting options in Ø200mm, Ø250mm or Ø300mm, and a 130mm shaft height facilitating integration or replacement. Its modular design reduces the number of references needed in stock and shortens intervention times, while Varvel's technical expertise ensures quiet and durable operation. An ATEX version is available for classified areas.

Discover the engines

Pair text with an image to focus on your chosen product, collection, or blog post. Add details on availability, style, or even provide a review.

Learn more