Industry-Verified Manufacturing Data (2026)

Lock Cylinder

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Lock Cylinder 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 Lock Cylinder is characterized by the integration of Cylinder Housing and Cylinder Plug. In industrial production environments, manufacturers listed on CNFX commonly emphasize Zinc Alloy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A mechanical component within an ignition lock assembly that houses the keyway and tumblers, enabling key insertion and rotation to engage/disengage the lock mechanism.

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Product Specifications

Technical details and manufacturing context for Lock Cylinder

Definition
The lock cylinder is the core security component of an ignition lock assembly, typically mounted within the steering column or dashboard. It contains a precisely machined keyway that accepts the vehicle's unique key profile, along with a series of pin tumblers or wafer tumblers that must align when the correct key is inserted. This alignment allows the cylinder plug to rotate, which in turn actuates the ignition switch mechanism to start the vehicle. It serves as the primary anti-theft device by preventing unauthorized key operation.
Working Principle
When the correct key is inserted into the keyway, its cuts or ridges lift the pin tumblers (or align wafer tumblers) to a precise shear line between the cylinder plug and outer housing. This alignment allows the plug to rotate freely within the housing. The rotation is mechanically transferred (often via a tailpiece or cam) to the ignition switch, changing its electrical state (OFF/ACC/ON/START). Without the correct key, the misaligned tumblers bind the plug to the housing, preventing rotation.
Common Materials
Zinc Alloy, Brass, Steel
Technical Parameters
  • Overall outer diameter and length of the cylinder housing, critical for fit within the lock assembly housing. (mm) Standard Spec
Components / BOM
  • Cylinder Housing
    The outer shell that houses the plug and tumblers, provides mounting points, and resists forced entry.
    Material: Zinc Alloy or Steel
  • Cylinder Plug
    The inner rotating core that contains the keyway. It rotates when the correct key aligns the tumblers.
    Material: Brass or Nickel-Silver Alloy
  • Pin Tumblers (or Wafer Tumblers)
    Small precision components (driver pins, key pins, springs, or wafers) that block rotation unless lifted/aligned by the correct key cuts.
    Material: Brass, Steel, Phosphor Bronze
  • Tailpiece (or Cam)
    The mechanical linkage that transfers rotation from the cylinder plug to the ignition switch actuator.
    Material: Steel
Engineering Reasoning
0.5-2.5 N·m torque, -40°C to 85°C temperature, 0-100% relative humidity
Shear stress exceeding 150 MPa at tumbler pins, angular displacement >3° from neutral position, surface roughness Ra >1.6 μm in keyway
Design Rationale: Plastic deformation of brass tumblers due to cyclic torsional loading exceeding yield strength of 125 MPa, abrasive wear at key-contact surfaces with coefficient of friction >0.3
Risk Mitigation (FMEA)
Trigger Accumulated particulate contamination (ISO 4406 Class 19/17/14) in keyway
Mode: Increased rotational resistance exceeding 4.0 N·m, preventing key extraction
Strategy: Integrate labyrinth seal with 25 μm clearance and positive-pressure purge system at 0.1 bar
Trigger Corrosion-induced galvanic potential >200 mV between brass tumblers and steel housing
Mode: Tumbler seizure at shear interface, requiring >15 N·m breakaway torque
Strategy: Apply 25 μm electroless nickel-phosphorus coating with salt spray resistance >500 hours per ASTM B117

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Lock Cylinder.

Ignition Cylinder Cylinder Lock automotive ignition lock cylinder replacement brass lock cylinder for vehicle manufacturing high-security pin tumbler lock cylinder OEM lock cylinder for car ignition assembly custom lock cylinder with steel housing

Applied To / Applications

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

Ignition Lock Assembly
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 component)
other spec: Key insertion force: 2-5 N, Rotation torque: 0.5-2 Nm
temperature: -40°C to +85°C
Media Compatibility
✓ Automotive ignition systems ✓ Industrial machinery locks ✓ Marine ignition assemblies
Unsuitable: High-vibration environments without dampening
Sizing Data Required
  • Keyway profile and dimensions
  • Lock cylinder diameter and length
  • Required security level (pin tumbler count)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Keyway Wear and Deformation
Cause: Repeated insertion/removal of keys under misalignment or excessive force, leading to material fatigue and loss of precise engagement with the key.
Internal Contamination and Binding
Cause: Accumulation of dirt, debris, moisture, or corrosion products within the cylinder mechanism, restricting pin/tumbler movement and causing jamming or increased rotational resistance.
Maintenance Indicators
  • Excessive rotational resistance or grinding feel when operating the key, indicating internal wear or contamination.
  • Visible keyway deformation, corrosion, or foreign material buildup around the cylinder entry point.
Engineering Tips
  • Implement regular cleaning and lubrication with a dry graphite or PTFE-based lubricant specifically designed for lock cylinders to prevent binding without attracting contaminants.
  • Ensure proper alignment during installation and use controlled, deliberate key operation to minimize off-axis loading and shear forces on the keyway and internal components.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ANSI/BHMA A156.5 - Cylinders and Input Devices DIN 18252 - Cylinders for locks
Manufacturing Precision
  • Pin diameter: +/-0.01mm
  • Keyway width: +/-0.02mm
Quality Inspection
  • Dimensional verification with CMM
  • Key torque and cycle testing

Factories Producing Lock Cylinder

Verified manufacturers with capability to produce this product in China

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✓ 95% Supplier Capability Match Found

P Procurement Specialist from Brazil Jan 23, 2026
★★★★★
"Great transparency on the Lock Cylinder components. Essential for our Motor Vehicle Manufacturing supply chain."
Technical Specifications Verified
T Technical Director from Canada Jan 20, 2026
★★★★★
"The Lock Cylinder we sourced perfectly fits our Motor Vehicle Manufacturing production line requirements."
Technical Specifications Verified
P Project Engineer from United States Jan 17, 2026
★★★★★
"Found 17+ suppliers for Lock Cylinder 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.”

16 sourcing managers are analyzing this specification now. Last inquiry for Lock Cylinder from Turkey (46m ago).

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Frequently Asked Questions

What materials are used in your lock cylinders for motor vehicles?

Our lock cylinders are manufactured using premium materials including zinc alloy for corrosion resistance, brass for durability, and steel for high-security applications, ensuring long-lasting performance in automotive environments.

How does the lock cylinder integrate with the ignition system?

The lock cylinder houses the keyway and tumblers, allowing proper key insertion and rotation. When turned, it activates the tailpiece or cam to engage or disengage the ignition lock mechanism, enabling vehicle starting or securing.

What are the main components in your lock cylinder BOM?

Our lock cylinder bill of materials includes the cylinder housing, cylinder plug, pin tumblers (or wafer tumblers for specific models), and tailpiece (or cam), all precision-engineered for reliable operation 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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