Tailpiece (or Cam): Diameter 8-12mm, Length 15-25mm

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

DIN 18252, ANSI/BHMA A156.5

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.

View Product Details

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Tailpiece (or Cam)

Manufacturer profiles associated with Tailpiece (or Cam).

Sourcing Tailpiece (or Cam) from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Mounting Interface

Precision mounting interface connecting punch tips to pharmaceutical tablet press machines for accurate tablet production.

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Tailpiece (or Cam)