DF651S-D | Bus steering axle
DF651S-D is a high-performance I-beam steering axle based on the F6.5-D platform with a rated load of 6500 kg and a standard air brake system (compatible with 22.5″ wheel flanges).
Core advantages include ultra-narrow tolerance wheelbase adjustment of 2,485–2,504 mm (industry-leading 19 mm precision tolerance), flexible layout with a wide range of rim mounting distances from 1,865–2,092 mm; dynamically adjustable kingpin center distance of 1,760–1,870 mm for optimized steering stability, and a 92.3 mm front axle drop for improved maneuverability on complex terrain;
Compatible with 11.00R22.5 heavy-duty tires and 8.25×22.5 rims, with an outer wheel steering angle of 43°, utilizing 10-M22×1.5 high-strength bolts and a φ335 bolt distribution circle for reinforced load-bearing structure.
We provide full life cycle services for all customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support.
DF651S-D Product Features
Electric Drive Heavy-Duty: Specifically designed for pure electric/hybrid buses, with a load capacity range of 5.5 to 7.5 tons, peak torque output increased by 40%, suitable for intercity/BRT heavy-duty scenarios.
All-around quiet operation: Electric drive-specific gears + active noise reduction system, NVH optimization of 50%, driving noise ≤60dB (urban conditions).
Intelligent electric control braking: Integrated EBS+ESP+energy recovery system, response time ≤0.1s, braking recovery efficiency >20%, supports optional electromagnetic retarder.
Extended maintenance-free operation: IP6K9K fully sealed design + intelligent temperature-controlled lubrication, key components (bearings/motor shaft) lifespan ≥ 800,000 kilometers, maintenance interval exceeding 100,000 kilometers.
Technical Specifications
| Category: | Steering axle |
| Platform: | DF651S-D |
| Basic Structure: | I-beam |
| Rated Load (kg): | 6500 |
| Brake Structure/Specifications: | Air brake/φ400×150、22.5″ |
| Maximum External Width A (mm): | 2485-2504 |
| Rim Installation Distance B (mm): | 1865-2092 |
| Kingpin Center Distance C (mm): | 1760-1870 |
| Spring Distance D (mm): | 970 |
| Front Axle Drop (mm): | 92.3 |
| Kingpin Inclination/Wheel Camber: | 7°/1° |
| Inner Wheel Steering Angle/Outer Wheel Steering Angle: | 43° |
| Rim: | 8.25×22.5 |
| Tire: | 11.00R22.5 |
| Wheel Bolts: | 10-M22×1.5 |
| Wheel Bolt Circle E (mm): | φ335 |
| Wheel Toe (mm): | 1 – 3 |
| Air Chamber Interface Dimensions: | NPT1/4、Z1/4、M16×1.5 |
| Optional Information: | Maintenance-Free Hub Unit |
| Lead Time: | 15 – 30 Working Days |
Model | Rated Load (Kg) | Brake Structure Form/Specification | Maximum Overall Width A (mm) | Rim | Tire | Wheel Bolt |
| DF651S-D | 6500 | Air brake/φ400×150、22.5″ | 2485 – 2504 | 8.25×22.5 | 11.00R22.5 | 10 – M22×1.5 |
| DF551S-D | 5500 | Air brake/φ400×150、22.5″ | 2424 – 2510 | 8.25×22.5 | 11.00R22.5 | 10 – M22×1.5 |
| DF701S-D | 7500 | Air brake/22.5″ | 2491 | 8.25×22.5 | 275/70R22.5 | 10 – M22×1.5 |
| ——END—— | ||||||
Basic information of bus steering axle | |||
| Category | Steering Axle | Basic Structure Form | I – beam |
| Rim Mounting Distance B (mm) | 1865 – 2092 | Kingpin Center Distance C (mm) | 1760 – 1870 |
| Spring Distance D (mm) | 970 | Front Axle Drop (mm) | 92.3 |
| Kingpin Inclination Angle/Wheel Camber Angle | 7°/1° | Inner Wheel Steering Angle/Outer Wheel Steering Angle | 43° |
| Wheel Bolt Distribution Circle E (mm) | φ335 | Wheel Toe – in (mm) | 1-3 |
| Air Chamber Interface Size | NPT1/4、M16×1.5、Z1/4 | Optional Information | Maintenance – free Hub Unit |
| ——END—— | |||
Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.
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Tags: Bus Steering Axle | DF651S-D
