The GFT series of travel speed reducers are ideal for driving vehicles and other mobile equipment with gear or chain drive. In addition, it can be applied wherever there is movement, rotation and placement. The GFT has different models for wide range of its use with compact structure, hardened surfaces which gives the equipment excellent load bearing capacity and operational reliability.
TheGFT17/88is aplanetary gear reducermanufactured byBosch Rexroth (Germany), designed specifically for行走驱动 (travel drive) and slewing systems in construction machinery, building equipment, and specialized vehicles. It features high torque output, compact structure, high transmission efficiency, and resistance to harsh environments, making it ideal for low-speed, high-torque applications.
II. Technical Specifications
【表格】
Parameter Typical Value (GFT17/88)
Model GFT17/88
Gear Ratio 88:1 (fixed; multi-stage options available)
Rated Torque 17 kN·m (17,000 N·m)
Max Input Speed 3,000 rpm (adjustable per application)
Output Speed ~34 rpm (at 3,000 rpm input)
Output Type Flange or spline (for drive wheels/slewing mechanisms)
Lubrication Forced (oil pump) or splash lubrication
Weight ~120–150 kg (varies by configuration)
Operating Temp -40°C to +60°C (seal material dependent)
Protection Class IP65 (dust/waterproof)
III. Key Advantages
1. High Torque Density
Planetary gear design achieves high torque output in a compact housing, ideal for space-constrained applications.
2. High Efficiency
95% transmission efficiency reduces energy loss, heat generation, and fuel consumption.
3. Durability
• Gears: Carburized and quenched (HRC 58–62) for wear resistance.
• Bearings: Premium brands (SKF/FAG) with >20,000-hour lifespan.
4. Sealing Performance
Dual-lip seals + dust barriers prevent contamination in mining/construction environments.
5. Modular Design
Customizable input flanges and output shafts for compatibility with motors/engines.
IV. Typical Applications
1. Construction Machinery
• Travel drives for excavators/loaders
• Slewing systems for rotary drilling rigs
• Vibratory roller drum drives
2. Building Equipment
• Concrete pump truck outrigger systems
• Tower crane slewing reducers
3. Mining Machinery
• Roadheader cutting head drives
• Scraper conveyor sprocket transmissions
4. Specialized Vehicles
• Fire truck ladder slewing systems
• Aerial work platform chassis drives
V. Selection Guidelines
1. Load Matching
• Calculate operating torque:T = 9550 × P / n(P = motor power in kW, n = output speed in rpm).
• Select a model with 20–30% torque margin to avoid overloading.
2. Speed Requirements
Verify input (motor) and output (drive wheel) speeds align with the gear ratio.
3. Installation Space
Measure mounting dimensions; choose flange-type (GFT17/88-F) or shaft-output (GFT17/88-S).
4. Environmental Adaptability
• Cold climates: Use low-temperature lubricant (e.g., Mobil SHC 634).
• Humid conditions: Add breathers to prevent condensation.
VI. Maintenance & Troubleshooting
【表格】
Issue Possible Cause Solution
Abnormal Noise Worn gears/damaged bearings Replace gear set or bearings
Oil Leakage Aged seals/overfilled oil Replace seals; adjust oil level
Low Output Power Degraded lubricant/mismatched ratio Change oil; verify gear ratio
Overheating Continuous overload/poor cooling Reduce load; check cooling fan
Routine Maintenance:
• Inspect oil level and cleanliness every 500 hours.
• Replace lubricant every 2,000 hours (Recommend: Rexroth HDX 46).
• Annual inspection for axial clearance and wear.
VII. Alternative Models
【表格】
Requirement Recommended Model Features
Higher Torque GFT26/120 26 kN·m rated torque, 120:1 ratio
Compact Design GFT11/60 30% smaller volume for micro-equipment
High-Speed Use GFT17/50 60 rpm output, 96% efficiency
