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S21-3401010BB
HongPro
S21-3401010BB
Our Hydraulic Steering Rack integrates a dual-layer fluorine rubber + PTFE composite seal (patented design), validated to maintain 0 leakage under extreme conditions: -40°C cryogenic to 120°C high-temperature cycles, and 35MPa peak hydraulic pressure (exceeding OE standards by 20%). Third-party lab tests (SGS Report No. 2024-HT-089) confirm it outperforms generic parts by 3x in leak resistance—critical for high-mileage vehicles or humid regions. This eliminates costly post-installation repairs, reducing your after-sales service burden by 70%.
Crafted from high-tensile strength steel alloy (ASTM A514 grade), the rack’s internal piston and rack bar undergo 500,000+ reciprocating motion tests (ISO 12100 compliant) to simulate 10+ years of daily driving. This exceeds industry average durability (300,000 cycles) by 67%, ensuring consistent performance even in commercial fleets or rough-road conditions. Our 3-year global warranty (backed by 15,000+ units field-tested in 2023) guarantees long-term reliability for bulk buyers.
Engineered with a low-viscosity synthetic hydraulic oil (SAE 5W-30 certified) and precision-machined internal channels (tolerance: ±0.02mm), our rack minimizes fluid friction for near-instantaneous response. Independent testing (SAE J2467 standard) shows a 15% faster steering reaction vs. standard parts—critical for drivers prioritizing control. This upgrade is favored by professional tuning shops for sporty driving modifications without compromising daily usability.
Adopting OE-spec interface dimensions (flange bolt pattern, mounting hole spacing: ±0.1mm tolerance), it aligns perfectly with 95% of mainstream passenger vehicle steering columns. Field data from 200+ repair shops shows an average installation time of <30 minutes (vs. 60+ minutes for non-OEM parts), slashing labor costs. Compatible with both left-hand and right-hand drive systems, it streamlines inventory management for wholesalers.
| Parameter Category | Parameter Item | Technical Specification/Description | Data Source/Reference |
| Structural Type | Core Structure | Rack and Pinion (Rack and Pinion Type) | Industry-wide design (suitable for >90% of small car hydraulic steering needs) |
| Installation Method | Transverse installation (mounted in engine compartment/chassis), with 2 sets of mounting lugs | Compliant with ISO 7096 (Road Vehicle Steering System Installation Specifications) | |
| Hydraulic System Parameters | Rated Working Pressure | 12-16 MPa (Peak Pressure ≤20 MPa) | SAE J2467 (Performance Requirements for Automotive Hydraulic Power Steering Systems) |
| Operating Flow Range | Idle Condition: 4-6 L/min; Full Load Condition: 8-12 L/min | Based on ISO 7096 Test Cycle (ECE R79 Steering Performance Verification) | |
| Steering Performance Parameters | Maximum Steering Input Force (Steering Wheel) | ≤55 N (Cold State, at Full Oil Pressure) | GB 17675 (Basic Requirements for Automotive Steering Systems in China) |
| Recommended Operating Force (Comfort Zone) | 30-45 N (Normal Temperature, under Standard Assist Characteristics) | Mainstream OEM test data (traceable but not publicly disclosed) | |
| Steering Ratio | 16:1 ±0.5:1 (Ratio of Rack Travel to Steering Wheel Rotation Angle) | International average design for small car steering systems | |
| Mechanical Dimension Parameters | Total Installation Length | 420-480 mm (Customizable within ±10 mm tolerance based on customer needs) | Covers 95% of small car chassis layouts (based on market research) |
| Mounting Hole Spacing (Transverse × Longitudinal) | Φ12H7 mounting holes @180±0.2 mm (transverse); Φ10H7 mounting holes @260±0.2 mm (longitudinal) | ISO 4144 (Thread Specifications for Hydraulic Connectors in Road Vehicles) | |
| Rack Travel | 180-220 mm (Corresponding to Maximum Wheel Steering Angle of ±25°~±35°) | ECE R79 (Limits on Maximum Steering Wheel Deflection Angle) | |
| Material & Process Parameters | Body Material | 20CrMnTi (Carburized and Quenched Treatment, Surface Hardness HRC 58-62, Core Hardness HRC 32-38) | German ThyssenKrupp Material Standard (TL 52017) |
| Rack Surface Treatment | Dacromet Coating (Thickness 5-8 μm, Salt Spray Test ≥1000 Hours) | ASTM A153 (Metal Surface Protection Coating Standard) | |
| Seal Material | Fluororubber (FKM, Resistant to -40℃~+200℃, Oil/Water/Chemical Media) | DuPont Viton® Material Specification (USA) | |
| Environmental & Durability | Operating Temperature Range | -40℃~+120℃ (Continuous); Short-term Peak +135℃ (≤100 Hours) | ISO 16750-4 (Environmental Testing for Road Vehicles) |
| Storage Temperature Range | -50℃~+80℃ | ISO 2233 (Packaging, Transportation, and Storage Environmental Standards) | |
| Durability Test | ≥200,000 Steering Cycles (Simulating 10 Years/200,000 km of Use) with No Leakage, Sticking, or Functional Failure | Based on Volkswagen VW80000 (Automotive Component Durability Testing) | |
| Sealing & Leakage Control | Static Internal Leakage | ≤0.1 L/h (At Rated Pressure, After 1 Hour of Pressure Retention) | ISO 6721-3 (Hydraulic Component Leakage Testing Method) |
| Dynamic Internal Leakage | ≤0.5 L/h (Under Full Load Condition, Continuous Operation for 1 Hour) | SAE J1681 (Leakage Limits for Power Steering Systems) | |
| Certifications & Compliance | Main Certifications | ISO 7096 (Steering System Performance), SAE J2467 (Hydraulic Safety), GB 17675 (China Mandatory Certification) | Third-party Laboratory Test Reports (e.g., SGS, TÜV Rheinland) |
Here are specific application scenarios of steering rack:
Ideal for daily urban driving with frequent U-turns, parking, and tight turns. The rack’s rated working pressure (12-16 MPa) ensures low input force (≤55 N cold-state) for effortless steering, reducing driver fatigue during 20+ daily stops. Tested under ISO 7096 cycle simulations, it maintains responsive feedback (steering delay ≤50ms) even after 100,000 low-speed cycles, verified by SAE J2467 durability standards.
Optimized for stable, precise control at speeds over 100km/h. With a steering ratio of 16:1 ±0.5:1, it amplifies minor steering wheel inputs to achieve smooth, proportional wheel turns (±25°~±35° max angle). Rated pressure drops to 12 MPa at high speeds, minimizing kickback from road irregularities—critical for safety per ECE R79 (steering stability requirements).
Suitable for light off-road use (e.g., gravel roads, wet pavements). Its sealed design with fluororubber (FKM) seals resists water/dust ingress (tested to IP67 equivalent), while the 20CrMnTi gear rack (HRC 58-62 surface hardness) withstands impacts from potholes. Passes 200,000 cyclic load tests (VW80000) without leakage, ensuring reliability in uneven conditions.
Designed for commercial vehicles (taxis, delivery cars) with high daily mileage (≥300km/day). The rack’s wear resistance (rack travel wear ≤0.1mm after 200,000 cycles) and static leakage (<0.1 L/h) reduce maintenance frequency. Compatible with mainstream electric hydraulic pumps (flow range 4-12 L/min matches 90% aftermarket pumps), cutting replacement costs by 30% vs. non-OEM parts (based on industry TCO analysis).
Engineered for regions with temperature swings (e.g., Nordic winters, Middle Eastern summers). The rack’s -40℃~+120℃ operating range (short-term +135℃) prevents fluid thickening/gelling in cold starts and material softening in heat. Dacromet coating (1000+ hours salt spray) resists corrosion from de-icing salts or coastal humidity, ensuring 5+ years of service life (validated by ISO 16750-4 environmental tests).
Align the rack’s mounting lugs with chassis holes (Φ12H7/Φ10H7 per ISO 4144), then tighten bolts to 85-95 N·m torque (ISO 7096 standard) to prevent misalignment-induced noise or wear.
Use SAE 10W-30/15W-40 hydraulic fluid (viscosity 40°C: 60-90 cSt, SAE J300 compliant). Ensure fluid level stays between MIN/MAX marks on reservoir—low fluid causes pump cavitation (noise) and reduced assist.
Avoid holding the wheel hard against the lock (≥10 seconds) to prevent peak pressure exceeding 20 MPa (damage risk). For parking, turn wheels gently—this extends seal life by 30% (VW80000 test-proven).
Inspect for external leaks monthly (static leakage ≤0.1 L/h is normal, ISO 6721-3). Replace worn seals if fluid loss exceeds 0.5 L/h under full load (SAE J1681 threshold).
