Varvel F RD42 Coaxial Gear Reducer – Output Shaft Ø35 x 70 mm

Why choose the Varvel F RD42 gearbox — Output shaft Ø35mm?

When it comes to industrial power transmission, the name Varvel is always mentioned. This Italian manufacturer has more than 60 years of experience in the design and production of gearboxes, gearmotors, and transmission components, with an established presence in major global industrial markets. Behind every Varvel product lies a demanding development process, rigorous material selection, and strict quality controls at every stage of manufacturing. For a design office or a maintenance manager, choosing Varvel means relying on a brand whose field reliability is well-proven.

Among its most advanced ranges, the RD series includes in-line helical gearboxes whose in-line architecture offers high mechanical efficiency and great flexibility of use. The F RD42 model is a particularly versatile variant: its compact square casing allows it to be installed in confined spaces without sacrificing performance, while its modular design facilitates adaptation to different installation configurations.

Technical characteristics of the FRD42 Ø35mm gearbox

At the heart of the Varvel F RD42 gearbox is a high-precision helical gear train that ensures smooth and silent mechanical transmission, with limited heat generation and perfectly controlled progressive wear. Here are its detailed technical characteristics:

• Type : In-line helical coaxial gearbox
• Brand / Series : Varvel — RD Series, size 42
• Output shaft : solid, keyed, Ø35x70mm
• Shaft height : 130mm
• Maximum output torque : 650 Nm
• Number of available reduction ratios : 23 ratios (from 2.25 to 63)
• Casing : square shape, compact construction
• Lubrication : oil bath, reduced maintenance
• ATEX version : available on request for explosive environments

Motor compatibility and IEC input flanges

The prefix F in the designation F RD42 indicates the presence of an integrated IEC input flange, designed to directly accommodate a standardized electric motor without an intermediate part. The gearbox covers motor sizes IEC 71, 80, 90, 100, 112 and 132 in both B5 (circular flange) and B14 versions.

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

Fixing and mounting

The Varvel F RD42 gearbox offers two distinct mounting solutions to adapt to the specific constraints of each installation. Foot mounting meets the needs of classic installations on frames or welded chassis. Output flange mounting is suitable for configurations requiring direct and rigid assembly on the receiving machine, with a choice of three flange diameters: Ø200mm, Ø250mm, or Ø300mm. The 130mm shaft height, conforming to common industrial standards, facilitates the replacement of an existing gearbox without modifying the installation.

23 available reduction ratios

Few gearboxes of this size offer such a wide range of choices. With 23 reduction ratios ranging from 2.25 to 63, the F RD42 can cover very different needs within the same range: 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 wealth of choice allows the selection of the most suitable ratio for each application, whether it is a slow drive with high torque or an intermediate speed transmission.

What applications use the F RD42 coaxial gearbox?

The Varvel F RD42 is a gearbox found in a wide variety of industrial environments. The food industry uses it on its conveyor lines, mixers, and packaging equipment, where production continuity and ease of cleaning are essential. The machine tool and agriculture sectors use it for robust transmissions subjected to sustained work cycles. In the field of energy — photovoltaic trackers, wind systems — its long-term reliability is particularly appreciated. It also equips automation installations, robotics cells, and handling systems where precision and regularity of transmission are non-negotiable.

What to remember about the Varvel F RD42 gearbox

The F RD42 is a complete industrial gearbox, combining in a compact format a maximum output torque of 650 Nm, a range of 23 ratios between 2.25 and 63, extended IEC compatibility from size 71 to 132 in B5 and B14, mounting flexibility by feet or by flange in Ø200mm, Ø250mm or Ø300mm, and a shaft height of 130mm facilitating integration. The modularity of its design limits stock references and reduces intervention times, while the Varvel manufacturing quality guarantees reliable and silent operation throughout the equipment's lifespan. an ATEX version is available for installations in classified areas.