Rossi Heavy Duty Extruder Gear Units & Drives
The Rossi Extruder Heavy Duty Gear Unit Platform (featured model: MR 2I 140 FO1A 1:14 Ratio) is Rossi's specialized heavy-duty drive series, engineered specifically to handle the extreme axial thrust loads, high thermal stresses, and continuous continuous torque demands of plastics, polymers, and rubber single-screw extrusion machinery. Built around Rossi's signature **monolithic (single-piece) cast-iron housing**, these extruder gearboxes feature an integrated housing nose housing oversized **spherical roller thrust bearings (294.. series)** that absorb continuous axial screw reaction forces directly through the gearbox frame without transferring stress to the gear mesh or motor. Utilizing case-hardened, precision-ground helical gear sets, Rossi extruder gearboxes deliver maximum fatigue strength and quiet operation. Covering output torque capacity from 3,000 Nm up to 150,000 Nm across 12 frame sizes (Size 100 to Size 451) and gear ratios from 6.3:1 to 28:1. WE DRIVE HONGKONG LIMITED supplies 100% original Rossi extruder gear units, forced lubrication systems, oil cooling units, and technical replacement support across global extrusion facilities.
Technical Specifications
| Featured Model | MR 2I 140 FO1A - 42x350 - 14 (Size 140 Extruder Unit, 2-Stage Parallel Helical, 1:14 Gear Ratio, Monolithic Housing, Heavy Thrust Housing Nose) |
|---|---|
| Brand / Manufacturer | Rossi S.p.A. (Moog Group) |
| Product Series | Heavy Duty Single-Screw Plastics & Rubber Extruder Drives (EP Extruder & Heavy Helical) |
| Frame Sizes Covered | Size 100, 125, 140, 160, 180, 200, 225, 250, 280, 315, 355, 400, 451 (Monolithic Cast Iron Construction) |
| Output Torque Capacity | 3,000 Nm to 150,000 Nm (26,500 lb-in to 1,327,000 lb-in Continuous Output Torque) |
| Axial Thrust Bearing System | Heavy-Duty Spherical Roller Thrust Bearings (Series 294..) Integrated in Front Housing Nose Assembly |
| Reduction Gear Ratios | Standard Nominal Ratios: 6.3:1, 8:1, 10:1, 12.5:1, 14:1, 16:1, 20:1, 25:1, 28:1 |
| Lubrication & Cooling | Forced Oil Lubrication Circuit with Shaft-Driven Pump; External Plate Heat Exchanger & Water Cooling Coils |
Documentation & Resources
Rossi Extruder Series Frame Size, Torque & Thrust Selection Matrix
Complete selection matrix for Rossi extruder heavy-duty gearboxes. Review frame sizes, maximum torque outputs, axial thrust bearing ratings, standard ratios, and model codes:
| Rossi Frame Size | Max Output Torque (Nm) | Max Axial Thrust Load (kN) | Gear Ratio Options (i) | Rossi Model Code Example | Thrust Bearing Type |
|---|---|---|---|---|---|
| Size 100 / 125 | 3,000 - 5,000 Nm | 180 kN | 6.3:1 - 28:1 | MR 2I 125 FO1A - 12.5 | Integrated 294.. Series |
| Size 140 / 160 | 8,000 - 12,000 Nm | 320 kN | 6.3:1 - 28:1 | MR 2I 140 FO1A - 14 | Integrated 294.. Series |
| Size 180 / 200 | 18,000 - 25,000 Nm | 520 kN | 6.3:1 - 28:1 | MR 2I 200 FO1A - 16 | Heavy Duty 294.. Series |
| Size 225 / 250 | 35,000 - 48,000 Nm | 850 kN | 6.3:1 - 28:1 | MR 2I 250 FO1A - 20 | Heavy Duty 294.. Series |
| Size 280 / 315 | 65,000 - 90,000 Nm | 1,300 kN | 6.3:1 - 28:1 | R 2I 315 FO1A - 14 | Reinforced Extruder Nose |
| Size 355 - 451 | 110,000 - 150,000 Nm | 2,100 kN | 6.3:1 - 28:1 | R 2I 400 FO1A - 16 | Heavy Cast Iron Extruder Nose |
Standard Extruder Reducer to Rossi Heavy Duty Extruder Upgrade Guide
Direct replacement guide for upgrading conventional split-casing extruder gearboxes to Rossi single-piece monolithic cast-iron units:
| Conventional Extruder Reducer | Common Industry Failure Modes | Current Rossi Extruder Equivalent | Key Upgrades & Operational Advantages |
|---|---|---|---|
| Split-Casing Extruder Gearbox | Casing flexing under polymer screw backpressure leading to oil leaks | Rossi MR 2I 140 FO1A Monolithic Frame | Rigid single-piece monolithic housing eliminates joint flex and gasket oil leaks. |
| Standard Thrust Bearing Reducer | Thrust bearing overheating and cage collapse during high-bar melt pressures | Rossi MR 2I 200 FO1A Heavy Thrust Nose | Integrated Series 294.. spherical roller thrust bearing isolates gear mesh from screw pressure. |
| Conventional Rubber/Plastics Reducer | Gear tooth surface pitting due to insufficient thermal oil cooling | Rossi MR 2I 250 FO1A Forced Oil Cooling | Shaft-driven forced oil lubrication circuit with plate heat exchanger maintains low oil temp. |
Expert Technical Sourcing & Extrusion System Integration Notes
When replacing older extruder gearboxes or overhauling high-duty single-screw extruders, switching to Rossi monolithic extruder drives delivers immediate operational benefits: complete elimination of housing joint oil leaks, high axial thrust resistance via Series 294.. spherical roller thrust bearings, ground quiet helical gearing, and long fatigue life under continuous 24/7 melt pressure. Simply provide us with your existing Rossi nameplate designation or complete specification code (e.g., MR 2I 140 FO1A - 42x350 - 14 or R 2I 200 FO1A - 16), and our technical engineering team will deliver a 100% compliant replacement specification and proposal.
Core Benchmark Model Standard Configurations
- MR 2I 100 FO1A (Plastics Extruder)
- MR 2I 125 FO1A (Plastics Extruder)
- MR 2I 140 FO1A (Plastics Extruder)
- MR 2I 160 FO1A (Plastics Extruder)
- MR 2I 180 FO1A (Plastics Extruder)
- MR 2I 200 FO1A (Plastics Extruder)
- MR 2I 225 FO1A (Plastics Extruder)
- MR 2I 250 FO1A (Plastics Extruder)
- R 2I 280 FO1A (Heavy Extruder)
- R 2I 315 FO1A (Heavy Extruder)
- Rossi Size 140 Extruder Gearbox
- Rossi Size 200 Extruder Gearbox
- Rossi Size 250 Extruder Gearbox
- Rossi Extruder Spherical Thrust Bearing
- Rossi Extruder Monolithic Cast Iron
- Rossi Extruder Forced Oil Pump Unit
- Rossi Single Screw Polymer Reducer
- Rossi Rubber Extrusion Heavy Gearbox
- Rossi Extruder Water Plate Cooler
- Rossi Extruder Heat Exchanger Kit
