Description
ZF IRM 50 A2 2.470 Gearbox
The ZF IRM 50 A2 (with a 2.470:1 gear ratio) is a compact marine transmission built by ZF Marine (MPM Padova). It handles up to 186.4 kW (250 HP) of power at 2400 rpm, features an SAE housing, mechanical coupling, and weighs approximately 32 kg.
Technical Specifications
- Brand / Model: ZF MPM Padova IRM 50 A2
- Gear Ratio: 2.470:1
- Max Power Handling: 186.4 kW (250 HP) @ 2400 rpm
- Weight: 32 kg
- Dimensions: 45 x 26 x 36 cm
- Key Features: SAE housing, mechanical coupling, oil filter and oil cooler control
Mechanical & System Integration
- Mounting Interface: Standardized SAE Flywheel Housing
- Input Coupling: Conic or splined input shaft designed for a flexible elastic torsional damper joint to eliminate engine vibration
- Actuation System: Mechanical shift control lever supporting push-pull cable hookups
- Thrust Bearing: Built-in heavy-duty output shaft thrust bearing designed to absorb maximum propeller axial thrust in both ahead and astern configurations
- Internal Lubrication: Integrated full-flow oil filter mechanism with external ports pre-configured for a dedicated marine transmission oil cooler loop
Core Performance Data
- Engine Power Rating: Max 186.4 kW (250 HP).
- Maximum Input Speed: 2400 RPM.
- Reduction Ratio: 2.470:1 (Ahead and Astern).
- Transmission Type: Reverse reduction marine transmission with an integrated angular down-angle configuration (indicated by the “A” classification)
