Industry-Verified Manufacturing Data (2026)

Ignition Lock Assembly

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Ignition Lock Assembly used in the Motor Vehicle Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Ignition Lock Assembly is characterized by the integration of Lock Cylinder and Electrical Switch Module. In industrial production environments, manufacturers listed on CNFX commonly emphasize Zinc alloy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A security and electrical switching mechanism that controls vehicle ignition and accessory power states.

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Product Specifications

Technical details and manufacturing context for Ignition Lock Assembly

Definition
The ignition lock assembly is a critical component of the steering column that integrates mechanical locking with electrical switching functions. It serves as the primary interface for starting the vehicle, controlling power distribution to various systems, and providing anti-theft security through key authentication.
Working Principle
When the correct key is inserted and turned, mechanical tumblers align to allow cylinder rotation. This rotation actuates electrical contacts that switch between OFF, ACC (accessory), ON/RUN, and START positions, controlling power flow to the vehicle's electrical systems and starter motor.
Common Materials
Zinc alloy, Steel, Thermoplastic polymers, Copper alloys
Technical Parameters
  • Overall dimensions including cylinder diameter, housing length, and mounting flange specifications (mm) Standard Spec
Components / BOM
  • Lock Cylinder
    Accepts and verifies key, provides mechanical rotation
    Material: Zinc alloy
  • Electrical Switch Module
    Controls power distribution to vehicle systems based on key position
    Material: Thermoplastic housing with copper contacts
  • Mounting Bracket
    Secures assembly to steering column structure
    Material: Steel
  • Tumbler Set
    Provides security by requiring specific key cuts for operation
    Material: Brass or steel
Engineering Reasoning
0.5-2.5 N·m torque, -40°C to 85°C ambient temperature, 9-16 VDC electrical input
Contact resistance exceeding 50 mΩ, mechanical wear exceeding 0.3 mm on tumblers, torque below 0.3 N·m for cylinder rotation
Design Rationale: Electromechanical contact degradation due to fretting corrosion at mating surfaces (contact resistance follows Holm's law: R = ρ/2a where a is contact radius), mechanical fatigue from cyclic loading exceeding 10⁶ cycles at 2 N·m torque
Risk Mitigation (FMEA)
Trigger Electrochemical migration between dissimilar metals (copper contacts and brass tumblers) in humid environments (>60% RH)
Mode: Increased contact resistance causing voltage drop >0.5 V at 10 A load
Strategy: Gold plating (0.5 μm thickness) on electrical contacts with hermetic sealing to IP67 standard
Trigger Plastic deformation of tumblers from shear stress exceeding 250 MPa during forced rotation attempts
Mode: Mechanical binding preventing key rotation beyond 15° angular displacement
Strategy: Case-hardened steel tumblers (Rockwell C 45-50) with anti-shear geometry and torque limiter at 3 N·m

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ignition Lock Assembly.

Ignition Switch Assembly Ignition Cylinder Assembly Steering Column Lock automotive ignition lock assembly replacement vehicle ignition switch security mechanism car ignition lock cylinder and tumbler set heavy-duty ignition lock for commercial vehicles OEM ignition lock assembly with mounting bracket

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Steering Column
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (mechanical/electrical component)
other spec: 12V or 24V DC electrical system, 30A max current rating
temperature: -40°C to 85°C
Media Compatibility
✓ Automotive cabin air environment ✓ Standard automotive electrical systems ✓ Key-based mechanical interfaces
Unsuitable: High-vibration industrial machinery (exceeds automotive vibration specs)
Sizing Data Required
  • Vehicle ignition system voltage (12V/24V)
  • Steering column diameter and mounting interface
  • Key tumbler configuration and security requirements

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wear-induced binding
Cause: Accumulation of debris, lack of lubrication, or mechanical wear of internal components (e.g., tumblers, springs) leading to increased friction and resistance during key insertion or rotation.
Electrical contact degradation
Cause: Corrosion, oxidation, or pitting of electrical contacts within the lock cylinder or switch assembly, resulting in intermittent or complete loss of electrical continuity for ignition signaling.
Maintenance Indicators
  • Audible grinding or scraping noise during key insertion or rotation
  • Intermittent or delayed engine cranking despite proper key positioning
Engineering Tips
  • Implement periodic cleaning and lubrication with manufacturer-approved dry graphite or silicone-based lubricants to reduce internal friction and prevent debris accumulation.
  • Install protective covers or seals to shield the lock cylinder from environmental contaminants (moisture, dust, road salt) that accelerate corrosion and wear.

Compliance & Manufacturing Standards

Reference Standards
ISO 11446:2012 (Road vehicles - Connectors for electrical systems) ANSI/SAE J1128 (Low Voltage Primary Cable) DIN 72551 (Terminals for electrical connections in motor vehicles)
Manufacturing Precision
  • Keyway alignment: +/-0.5° angular tolerance
  • Electrical contact resistance: <0.01 ohms at rated current
Quality Inspection
  • Torque-to-turn test for mechanical operation
  • Dielectric withstand voltage test (500V AC for 60 seconds)

Factories Producing Ignition Lock Assembly

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

T Technical Director from United Arab Emirates Jan 02, 2026
★★★★★
"Great transparency on the Ignition Lock Assembly components. Essential for our Motor Vehicle Manufacturing supply chain."
Technical Specifications Verified
P Project Engineer from Australia Dec 30, 2025
★★★★☆
"The Ignition Lock Assembly we sourced perfectly fits our Motor Vehicle Manufacturing production line requirements. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Singapore Dec 27, 2025
★★★★★
"Found 18+ suppliers for Ignition Lock Assembly on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

6 sourcing managers are analyzing this specification now. Last inquiry for Ignition Lock Assembly from Mexico (1h ago).

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Frequently Asked Questions

What materials are used in this ignition lock assembly for durability?

This ignition lock assembly is constructed from zinc alloy, steel, thermoplastic polymers, and copper alloys to ensure corrosion resistance, mechanical strength, and reliable electrical conductivity in demanding automotive environments.

How does the ignition lock assembly integrate with vehicle security systems?

The assembly combines a lock cylinder with a tumbler set for physical security and an electrical switch module that controls ignition and accessory power states, often interfacing with modern anti-theft and immobilizer systems.

What are the main components included in the BOM for installation?

The bill of materials includes an electrical switch module, lock cylinder, mounting bracket, and tumbler set, providing all necessary parts for a complete replacement or OEM installation in motor vehicle manufacturing.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Motor Vehicle Manufacturing sector.

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