Replacement Gearbox for Rexroth GFT450

4 week ago

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4 year

Product details

Replacement Gearbox for Rexroth GFT450

1. Product Overview

This replacement planetary gearbox is fully interchangeable with the original Rexroth GFT450 series final drive reducer, designed as a core torque amplification part for heavy mobile hydraulic systems. It pairs with axial piston travel motors to drive crawler equipment such as large excavators, pile drivers and drilling rigs. It adopts the same installation dimensions, gear ratio and load rating as the OEM unit, supporting direct drop-in replacement without modifying motor interfaces, track frames or hydraulic piping. It is widely used for aftermarket maintenance and cost-effective retrofitting of heavy construction machinery.

2. Key Technical Specifications

Parameter Specification

Applicable Original Model Rexroth GFT450 series travel planetary gearbox

Structure Type Multi‑stage planetary reduction gearbox

Input Torque Range Matches OEM torque rating of original GFT450

Reduction Ratio Full range of stock ratios compatible with original variants

Mounting Pattern Identical flange and shaft dimensions to OEM part

Gear Material Case‑hardened alloy steel for high contact fatigue resistance

Seal Configuration Shaft oil seal + O‑ring set for muddy, dusty site conditions

Max Allowable Output Load Same heavy‑load threshold as original Rexroth unit

Lubrication Method Splash oil lubrication with standard gear oil filling port

Working Condition Outdoor earthmoving, mining, piling and drilling cyclic heavy loads

3. Working Principle

High‑speed low‑torque power from the upstream hydraulic travel motor enters the sun gear of the first planetary stage. Power transfers through successive planetary gear sets to cut rotational speed and multiply output torque. The final carrier drives the crawler sprocket to propel heavy machinery. Internal roller bearings absorb radial and axial impact loads during frequent start‑stop and steering cycles; integrated sealing blocks mud, water and dust to extend gear service life.

4. Core Advantages

1. 1:1 interchangeable mounting and interface dimensions, direct replacement for original Rexroth GFT450 to cut downtime.

2. Alloy steel carburized gears deliver strong wear and shock resistance for harsh mining and construction sites.

3. Matched reduction ratios preserve the original machine travel speed and tractive force without performance loss.

4. Optimized bearing fit and sealing structure reduce gear noise and external oil leakage in muddy worksites.

5. Lower procurement cost than OEM parts with stable domestic supply, ideal for bulk fleet maintenance.

5. Application Scope

Replacement use for large excavators, rotary drilling rigs, pile drivers and tracked heavy machinery originally fitted with Rexroth GFT450 final drives, covering mining excavation, foundation piling, large earthwork and tunnel construction scenarios.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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4 year

Main Product: hydraulic motor, gear box , hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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