Motovario HRF121 Inline Helical Gearbox – 55mm Solid Output Shaft, Cast Iron, Ratios 1.23:1–7.70:1 (FA/FB/FC Flange Options)
The Motovario HRF121 inline helical gearbox is a heavy-duty, high-efficiency reducer designed for continuous industrial service. Built with a robust cast iron housing and a 55 mm solid output shaft, HRF121 delivers smooth torque transmission, low vibration, and long service life. Flexible IEC motor mounting and FA/FB/FC flange options make integration straightforward across conveyors, mixers, and large OEM machinery.
Key Specifications
Manufacturer: Motovario
Series: HRF – Inline Helical, Foot/Flange Mount
Model: HRF121
Output Shaft: 55 mm Solid Shaft
Ratio Range: 1.23:1 • 1.42:1 • 1.81:1 • 2.00:1 • 2.48:1 • 2.95:1 • 3.14:1 • 3.58:1 • 4.12:1 • 4.80:1 • 5.21:1 • 6.25:1 • 7.70:1
Motor Inputs (IEC): 132B5 | 160B5 | 180B5 | 200B5
Flange Types: FA (Ø350 mm) | FB (Ø300 mm) | FC (Ø250 mm)
Housing: Cast Iron (RAL 5010 blue)
Lubrication: Synthetic gear oil, ISO VG220
Mechanical & Construction
Gearset: Precision helical gears for high efficiency and low noise
Bearings: Heavy-duty taper roller bearings on output
Seals: NBR nitrile oil seals (input & output)
Cooling: Ribbed casing for thermal dissipation
Backlash: Low backlash for accurate motion control
Performance & Duty
Torque Capacity: Model/ratio dependent (application sizing available)
Duty Rating: S1 continuous industrial duty
Mounting: Foot or Flange (FA/FB/FC), horizontal or vertical
Environment: Designed for tough plant conditions with quiet running
Typical Applications
- Heavy conveyors & bulk handling systems
- Mixers, agitators & process drives
- Pumps, fans and general OEM machinery
- Packaging and material processing lines
Features & Benefits
- ✅ High-efficiency helical gearing reduces energy use
- ✅ 55 mm solid shaft for robust torque transfer
- ✅ IEC motor ready up to 200B5 for easy integration
- ✅ FA/FB/FC flange options for flexible mounting layouts
- ✅ Low vibration & noise for smooth continuous duty
What You Need to Specify
- Motor: kW, frame size (132–200), and pole count
- Required output speed (choose ratio 1.23:1–7.70:1)
- Mounting style: Foot or FA/FB/FC flange
- Shaft and coupling details (55 mm output)
Why Buy from Worm Gear Motors Online
Genuine Motovario supply: Warranty-backed, fully traceable.
Engineering support: We confirm torque, ratio, bearing loads & mounting before dispatch.
Fast UK delivery: Stock and rapid sourcing for breakdowns.
Best Price Guarantee: Found it cheaper? We’ll beat it!
Order the Motovario HRF121 Inline Helical Gearbox
All ratios, motor inputs and flange options available with expert selection help.
Contact us for pricing, availability & technical sizing
