INDUSTRY COMPONENT

Tailpiece (or Cam)

A precision cam component in lock cylinders that converts rotary key motion into linear bolt movement for secure locking/unlocking.

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Component Specifications

Definition
The tailpiece, also known as the cam, is a critical mechanical component within lock cylinders that interfaces between the key cylinder and the bolt mechanism. This small but essential part translates the rotational motion from the key turning into linear displacement that engages or disengages the locking bolt. Typically positioned at the rear of the lock cylinder, it features specific geometric profiles (cam surfaces) designed to provide precise mechanical advantage and reliable operation over thousands of cycles.
Working Principle
Operates on cam mechanism principles where rotational input from the key cylinder causes eccentric surfaces on the tailpiece to push against the bolt mechanism, converting rotary motion into linear displacement. The cam profile determines the throw distance and mechanical advantage, ensuring the bolt moves the required distance with minimal key torque.
Materials
Typically manufactured from brass alloys (C36000, C37700) for corrosion resistance and machinability, or stainless steel (304, 316) for high-security applications. Some variants use zinc alloys or engineered polymers for cost-sensitive applications.
Technical Parameters
  • Length 15-25mm
  • Diameter 8-12mm
  • Cycle Life ≥50,000 cycles
  • Torque Rating 2-8 Nm
  • Rotation Angle 45-90 degrees
  • Throw Distance 3-8mm
Standards
ISO 9001, DIN 18252, ANSI/BHMA A156.5

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Tailpiece (or Cam).

lock cam tailpiece cylinder component mechanical lock parts security hardware cam mechanism lock cylinder parts door lock components Tailpiece (or Cam) Tailpiece (or Cam) in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Lock Cylinder

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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Engineering Analysis

Risks & Mitigation
  • Mechanical wear leading to increased operating torque
  • Corrosion in marine/humid environments
  • Incompatibility with bolt mechanisms causing binding
  • Material fatigue from cyclic loading
FMEA Triads
Trigger: Insufficient lubrication on cam surfaces
Failure: Increased friction leading to key binding and eventual seizure
Mitigation: Regular maintenance with appropriate lubricants; design with self-lubricating materials or coatings
Trigger: Corrosive environment exposure
Failure: Material degradation and eventual mechanical failure
Mitigation: Use corrosion-resistant materials (stainless steel, brass); apply protective coatings; specify appropriate material grades for environment
Trigger: Excessive torque during operation
Failure: Shear failure at mounting points or cam surface deformation
Mitigation: Design with adequate safety factors; implement torque-limiting features; user education on proper operation

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1mm on critical dimensions, ±2 degrees on angular positioning
Test Method
Cyclic testing per ANSI/BHMA A156.5, torque testing, corrosion resistance testing per ASTM B117

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between a tailpiece and a cam in lock terminology?

While often used interchangeably, 'tailpiece' typically refers to the entire component that extends from the cylinder, while 'cam' specifically describes the eccentric mechanical surface that converts rotary to linear motion. In practice, most lock manufacturers use these terms synonymously.

Can tailpieces be replaced independently of the entire lock cylinder?

Yes, most tailpieces are designed as replaceable components. However, compatibility with specific cylinder brands and bolt mechanisms must be verified, as dimensions, throw distances, and mounting interfaces vary between manufacturers.

What causes tailpiece failure in lock cylinders?

Common failure modes include material fatigue from repeated cycling, corrosion in harsh environments, wear on cam surfaces from friction, and mechanical overload from excessive force during operation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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