DD502S | Steering axle
DD502S is a high-performance steering axle of the F5.0 series, adopting an I-beam structure, with a rated load of 5000kg (for heavy-duty demand).
It is equipped with a high-efficiency air brake system (adapted to 19.5° rim) as standard, and the key parameters are precisely optimized: fixed wheelbase of 2363mm to strengthen the stability, rim mounting distance of 2086mm for precise layout; main pin center distance of 1753mm to enhance the steering rigidity.
Exclusive design of 120+25mm front axle drop (the highest in the whole series), adapted with 7.50×19.5 rims and 245/70R19.5 wide base tires, the steering angle of the outer wheels reaches 49° (the top in the industry), and the bolts adopt 8-M20×1.5, which can satisfy the requirements of reliability and mobility of the commercial vehicles under complicated working conditions.
DD502S Product Features
Super Load Bearing: Flange-forged I-beam technology with load-bearing capacity covering 5.0 to 8.0 tons, suitable for ultra-heavy-duty scenarios such as ports and mines.
Heavy Load Braking: Standard equipped with large Ø420mm dual-chamber air brakes, with optional ABS and automatic adjusters, resistant to high temperatures and decay.
Structure Reinforcement: Wider wheelbase (1950-2200mm), axle housing made of high-strength alloy steel, increasing torsional resistance by 30%.
Long-term Maintenance: Integrated central lubrication system, upgraded sealing of key components, extending maintenance intervals to 5000km.
Technical Specifications
| Category: | Steering axle |
| Platform: | DF502S |
| Basic Structure: | I – Beam |
| Rated Load (kg): | 5000 |
| Brake Structure/Specifications: | Air brake/19.5″ |
| Maximum External Width A (mm): | 2363 |
| Rim Installation Distance B (mm): | 2086 |
| Kingpin Center Distance C (mm): | 1753 |
| Spring Distance D (mm): | 923 |
| Front Axle Drop: | 120+25 |
| Kingpin Inclination/Wheel Camber: | 9° / 0.5° |
| Inner Wheel Steering Angle/Outer Wheel Steering Angle: | 49° |
| Rim: | 7.50×19.5 |
| Tire: | 245/70R19.5 |
| Wheel Bolts: | 8-M20×1.5 |
| Wheel Bolt Circle E (mm): | φ275 |
| Wheel Toe (mm): | 1 – 3mm |
| Air Chamber Interface Dimensions: | NP1/4 、M1.6 × 1.5、Z1/4 |
| Optional Information: | Maintenance-free hub unit |
| Lead Time: | 15 – 30 Working Days |
| Payment Terms: | T/T, L/C |
Model | Rated Load (kg) | Brake Structure Form/Specifications | Maximum External Width A (mm) | Rim | Tire | Wheel Bolts |
| DD502S | 5000 | Air brake/19.5″ | 2363 | 7.50×19.5 | 245/70R19.5 | 8 – M20×1.5 |
| DF501S | 5000 | Air brake/φ400×130、 φ400×150、22.5″ | 2173 – 2521 | 8.25×22.5 | 11.00R22.5 | 10 – M20×1.5 |
| DF601S | 6000 | Air brake/φ400×150、22.5″ | 2251 – 2538 | 8.25×22.5 | 11.00R22.5 | 10 – M22×1.5 |
| DF701S | 7000 | Air brake/φ400×150、 φ410×180、22.5″ | 2045 – 2645 | 8.25×22.5 | 275/70R22.5 | 10 – M22×1.5 |
| DF801S | 8000 | Air brake/φ410×180、22.5″ | 2457 – 2503 | 9.00×22.5 | 315/80R22.5 | 10 – M22×1.5 |
| ——END—— | ||||||
Steering Axle General Information | |||
| Category | Steering Axle | Basic Structure Form | I – Beam |
| Rim Installation Distance B (mm) | 2086 | Kingpin Center Distance C (mm) | 1753 |
| Spring Distance D (mm) | 932 | Front Axle Drop (mm) | 120 + 25 |
| Kingpin Inclination/Wheel Camber | 9°/0.5° | Inner Wheel Steering Angle/Outer Wheel Steering Angle | 49° |
| Wheel Bolt Distribution Circle E (mm) | φ275 | Wheel Toe – in (mm) | 1 – 3mm |
| Air Chamber Interface Size | NPT1/4、M16、1.5、 Z1/4 | Optional Information | Maintenance – free Wheel 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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