GFT220 FINAL DRIVE
4 week ago
Product details
1. Product Overview
The GFT220 is a heavy-duty planetary walking FINAL DRIVE from the Rexroth GFT series, featuring an integrated design combining reducer and hydraulic motor mounting interface. Its full designation is GFT220 Travel Assembly. It serves as the core walking transmission component for crawler drilling rigs, large excavators, open-pit mine mucking loaders and crawler cranes. The same product line offers matching SWING REDUCER slew reducers to supply a complete set of walking and slew hydraulic reduction units for whole machinery.
Model Definition
- GFT: Series code for fully hydraulic integrated planetary walking reducer
- 220: Frame size representing a heavy torque-bearing grade for heavy engineering machinery under severe working conditions
- Suffix T2/T3/R3: Denotes 2-stage / 3-stage planetary reduction structures with available gear ratios ranging from 70 to 220, customizable for different chassis travel speed requirements
2. Structure & Working Principle
Adopting an integral flanged enclosed planetary gearbox (standard FINAL DRIVE integrated structure), the complete Travel Assembly consists of six core parts: input adapter, sun gear, planetary carrier, internal ring gear, output flange and heavy-duty multi-disc wet parking brake plus high-strength output hub.
1. The hydraulic motor input end directly connects to the sun gear, driving 3–4 sets of carburized planetary gears to revolve around the fixed internal ring gear. The multi-stage planetary structure amplifies torque and reduces rotational speed.
2. The output flange couples directly with the crawler drive wheel hub without extra couplings for an ultra-compact layout.
3. A normally closed wet brake is built in to automatically lock the crawler and prevent rollaway on slopes once oil supply cuts off, delivering superior safety protection.
4. Modular universal design shares gear heat treatment processes and sealing spare parts with the matching SWING REDUCER slew reducer, improving spare part interchangeability for maintenance.
3. Key Performance Parameters
1. Rated Max Output Torque: 220,000 N·m; Peak Impact Torque: 265,000 N·m
2. Reduction Structure: Mainstream GFT220T3 with 3-stage planetary transmission; Optional gear ratios: 72 / 96 / 128 / 145 / 185 / 218
3. Compatible Motor Displacement: Matches A2FE125 / A2FE160 / A2FE180 bent-axis piston motors
4. Working Oil Pressure: Rated 32 MPa, Peak Pressure Resistance: 42 MPa
5. Output Flange: Large-diameter multi-bolt flange made of forged high-strength steel for heavy crawler drive wheel mounting
6. Rotational Speed Range: Max Input Speed 3,500 rpm; Output Travel Speed 0.8–12 r/min
7. Material: All gears made of carburized and quenched alloy steel; Integral cast steel housing for harsh working conditions including mines, muddy ground and gravel terrain
4. Core Product Advantages
1. Heavy-duty FINAL DRIVE ultimate transmission solution: Abundant torque reserve ensures no slipping during climbing and heavy traction, with stable performance without attenuation during long-hour open-pit mining operations.
2. Pre-assembled all-in-one Travel Assembly: Motor, brake and reducer are integrated before delivery. Users only need to flange-mount to the chassis for installation, drastically shortening assembly lead time.
3. Durable & long service life: High-precision ground gears paired with imported oil seals and floating seals achieve dual protection against silt and water ingress, boasting a far lower failure rate than split-type reducers.
4. Complete supporting product lineup: While purchasing the GFT220 walking FINAL DRIVE, customers can simultaneously order SWING REDUCER slew reducers with identical craftsmanship to complete the whole supply chain of walking and slew transmission for construction machinery.
5. OEM replacement available: Perfect substitute for original Rexroth part number R916636032; supplies brand-new complete units, refurbished used units and individual gear spare parts.
5. Main Application Scenarios
- Full-hydraulic crawler rotary drilling rigs, open-pit rock drilling jumbos
- Heavy excavators over 60 tons, mine-use crawler mucking loaders
- Crawler pile drivers, anchor drilling rigs, crawler crane undercarriage walking mechanisms
- Custom heavy crawler chassis equipment (mining crawler transporters, engineering drill chassis)
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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4 year
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