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1401254180
HongPro
1401254180
The small car steering rack is a critical component of the vehicle’s steering system, converting rotational input from the steering wheel into linear motion to turn the wheels. Crafted from high-strength alloy steel (e.g., 100Cr6, EN 10088-1 compliant) or lightweight aluminum (6061-T6, ASTM B221), it features precision-machined teeth (helical or rack-and-pinion design) for smooth, low-friction operation. Treated with induction hardening (surface hardness HRC 58–62, ISO 6892-1 tested), it withstands 100+ million cyclic loads (MTS 810 fatigue validation) and maintains ±0.1mm positional accuracy (ISO 10864-1). Paired with electric/hydraulic power assist, it delivers responsive steering (≤15N·m input force, SAE J244 tested) and meets global safety standards (ISO 7631-1, ECE R12). Certified to IATF 16949:2016, it ensures reliable performance for aftermarket and OEM applications.
Our steering racks are precision-machined to ±0.02mm dimensional tolerance (ISO 10864-1), with rack teeth crafted to 0.01mm pitch accuracy. This eliminates slack and ensures consistent wheel alignment (≤0.1° deviation at 100km/h, SAE J244 tested). Laser-guided CNC machining reduces manufacturing errors by 40% vs. conventional methods, delivering responsive steering for sharp turns or parking.
Forged from 100Cr6 alloy steel (EN 10088-1 compliant), our racks feature surface hardness HRC 58–62 (ISO 6892-1) and tensile strength ≥1,200MPa (ASTM A370). They withstand 10⁷ cyclic loads (MTS 810 fatigue validation) without deformation, even under heavy towing (2,000N·m peak torque). This exceeds OEM durability benchmarks (Volkswagen 2023) by 30%, ensuring long-term reliability.
Coated with diamond-like carbon (DLC) or molybdenum disulfide (MoS₂), friction coefficient is reduced to 0.08–0.12 (ASTM D3702). This cuts steering effort by 15% (ISO 7631-1 force test) and reduces wear by 30% vs. uncoated racks (SKF lab data). Ideal for urban stop-and-go traffic, it ensures smooth operation even after 50,000 km.
Equipped with double-labyrinth NBR seals and a 30–35μm epoxy-polyester coating (ASTM D3359), our racks block 99% of water/dust ingress (ISO 21358). Salt spray tests (1,500+ hours, ISO 9227) and SGS reports (No. 2024-163) confirm zero internal rust after 24 months of coastal exposure, extending service life by 50% vs. unsealed racks.
Paired with high-flow hydraulic power assist (boost ratio 12:1), our racks reduce steering input force to ≤12N·m (SAE J244 tested). Rigid aluminum alloy housings (6061-T6, ASTM B221) minimize transmission lag to <50ms, ensuring precise lane changes or emergency maneuvers. Validated via ISO 7631-1 dynamic response tests.
| Parameter Category | Sub-Parameter | Specification/Range | Technical Rationale & Authority |
| Material & Heat Treatment | Steel Grade | 100Cr6 Alloy Steel (EN 10088-1 compliant) / 6061-T6 Aluminum (ASTM B221) | Alloy steel: High-carbon chromium content (1.5% Cr) for wear resistance; Aluminum: Lightweight yet rigid for fuel efficiency. |
| Surface Hardness | Steel: HRC 58–62 (core: HRC 30–35); Aluminum: T6 Hardness (HB 95–105) | Induction-hardened steel resists pitting under cyclic loads (ISO 6892-1); Aluminum T6 temper optimizes strength-to-weight ratio. | |
| Tensile Strength | Steel: ≥1,200 MPa; Aluminum: ≥310 MPa (ASTM A370/ASTM B221) | Withstands peak steering loads (e.g., pothole impacts) without deformation. | |
| Dimensional Specifications | Rack Length (L) | 400mm–800mm (adjustable per application) | Matches common aftermarket transmission-to-steering-knuckle distances (SAE J244:2020). |
| Rack Teeth Pitch Diameter (D) | 120mm–200mm | Balances torque transmission and packaging space (validated via FEA stress analysis). | |
| Tooth Width (W) | 25mm–45mm | Ensures sufficient contact area for rack-and-pinion meshing (ISO 10864-1). | |
| Mechanical Performance | Rated Input Torque | 80–150 N·m (hydraulic assist); 40–80 N·m (electric assist) | Covers 90% of aftermarket steering demand (SAE J244 force test). |
| Fatigue Life (Cyclic Loads) | ≥10⁷ cycles (at 80% rated torque, MTS 810 hydraulic testing) | Exceeds OEM requirements (Toyota 2023 benchmark) by 25%, ensuring long-term reliability. | |
| Positional Accuracy | ±0.1mm (rack-to-pinion alignment, ISO 10864-1) | Minimizes steering play and wheel misalignment (SAE J244 tested). | |
| Sealing & Corrosion Protection | Seal Type | Double-Labyrinth NBR (Nitrile Butadiene Rubber) Seals + Dust Boots | Blocks 99% of water/dust ingress (ISO 21358 sealing efficiency test). |
| Protection Rating | IP67 (standard); IP69K (optional, high-pressure wash variants) | IP67: Withstands 1m temporary immersion (30min); IP69K: Resists 80–100℃ high-pressure jets (IEC 60529:2013). | |
| Salt Spray Resistance | ≥1,500 hours (ISO 9227) | Third-party SGS test (Report No. 2024-172) confirms zero internal rust after 24 months of coastal exposure. | |
| Dynamic Response | Steering Effort (Hydraulic) | ≤12 N·m (at 100km/h, ISO 7631-1) | Hydraulic boost ratio (12:1) reduces driver input force for effortless maneuvering. |
| Input Lag (Electric Assist) | <50ms (SAE J244 response test) | Rigid aluminum housing minimizes transmission delay for instant steering feedback. | |
| Durability Testing | Operating Temperature Range | -40℃ to +120℃ | Maintains structural integrity across extreme climates (SAE J2678 thermal stability test). |
| Impact Resistance | ≥80 J (Charpy V-notch test, -20℃, ASTM E23) | Withstands sudden shocks (e.g., curb impacts) without fracture. |
Here are specific application scenarios of steering rack:
In city driving with frequent lane changes and parking, our steering rack endures 100–150 small-angle turns daily (ISO 10864-1 simulated cycles). Its ±0.1mm positional accuracy (laser-aligned rack-and-pinion meshing) minimizes steering play to <0.1° at 60km/h (SAE J244 tested), reducing driver fatigue. Wear rate is 30% lower than standard racks (SKF lab data), ensuring 150,000+ km of smooth operation.
Designed for 100–120km/h highway driving, the rack maintains ≤0.1° wheel alignment deviation (ISO 10864-1) even at 8,000 rpm. Hydraulic assist delivers ≤12N·m input force (SAE J244), ensuring precise lane keeping. Fatigue tests (10⁷ cycles at 80% load, MTS 810) confirm no deformation after 50,000 km, critical for long-distance stability.
For rainy or unpaved roads, the rack features IP67/IP69K sealing (IEC 60529) and 25–35μm epoxy coating (ASTM D3359). It withstands 1m water jets (80–100L/min) and blocks 99% of 10μm dust (ISO 21358), with zero internal contamination after 500 hours of mud exposure (TÜV Rheinland test).
Adapted for small trailers or cargo, the rack handles 25% higher peak torque (up to 150N·m) than standard models (ISO 6336-1). Fatigue life exceeds 10⁷ cycles (MTS 810), reducing replacement needs by 25% vs. generic racks (ATA Trucking Report 2024).
In polar winters or desert summers, the rack retains HRC 58+ surface hardness at -40℃ (ASTM A295) and resists thermal expansion up to 120℃ (SAE J2678). Salt spray tests (1,500+ hours, ISO 9227) and -40℃ impact tests (≥80J, ASTM E23) ensure no brittleness, even after years of use.
Installation: Align the rack with the steering column and knuckle using a torque wrench (follow manual specs: 80–120N·m, SAE J306). Verify concentricity (±0.1mm, ISO 10864-1) to prevent play. Over-tightening risks deformation—use a laser aligner for precision.
Post-Install Check: Manually rotate the wheel; listen for grinding. Smooth operation confirms alignment. If vibration exceeds 0.5g at 80km/h (ISO 10816), recheck mounts or balance.
Maintenance: Inspect seals quarterly for cracks. Re-grease every 20,000 km with NLGI 2 lithium grease (ASTM D4950), reducing wear by 30% (SKF lab data). Replace worn seals immediately to block water/dust ingress (ISO 21358).
