F-Series Gearbox
The F Series gearbox is a parallel-shaft helical gear unit built to the widely recognised F-series form factor, in which the output shaft runs parallel to and offset from the input. The offset, flat-profile housing lets the unit sit close against a machine frame and fit directly onto a driven shaft through a hollow bore or shrink disc, which is why F-series units are a standard parallel-shaft choice for conveyors, agitators, extruders and bulk-handling drives across Europe and the GCC. All stages are helical, so the drive keeps high efficiency and smooth, quiet meshing.
F-series units are typically two- or three-stage, covering wide ratios; single steps near 1.25:1 to 8:1 build to roughly 200:1 and higher across stages. Per-stage efficiency is generally high, commonly cited near 96-98 percent, so multi-stage units stay well above 90 percent overall. Power scales from sub-kW gearmotors to several hundred kW on large frames. The F-series housing's lateral mounting holes allow side-mounting directly into the machine in addition to conventional positions. Load rating follows AGMA 2001/2101 or ISO 6336, with enclosed-drive practice per AGMA 6010 and gear quality to ISO 1328 / AGMA 2015.
Gears are case-hardened alloy steel (20MnCr5 / 18CrNiMo7-6) with ground or lapped profiles, in cast-iron housings (aluminium on the smallest frames), on SKF/FAG-equivalent bearings with shaft seals, breather/drain provision and ISO VG 220/320 mineral or synthetic PAO lubrication.
Output is a keyed hollow shaft (commonly two bore sizes per frame) or a keyless shrink-disc fitting, with solid shaft and flange alternatives. Inputs accept IEC/NEMA motor adapters, servo flanges or free input shafts, and several mounting positions are supported. Service factor is selected per AGMA SF against the duty.
Himalay's MSME partners manufacture F-series parallel-shaft helical gearboxes and gearmotors with gear-rating to AGMA/ISO 6336, ISO 9001 quality systems, load/efficiency test reports and traceability; CE (Machinery Directive), ATEX/IECEx for hazardous areas, and SABER (Saudi Arabia) coordinated as part of the standard order flow.
