INDUSTRY COMPONENT

Alignment Dowel/Pin

Precision cylindrical component for accurate alignment and positioning in modular machine interfaces

View Specifications

Component Specifications

Definition
A precision-machined cylindrical dowel or pin designed to ensure exact alignment between modular machine components during assembly. It provides positive location and prevents relative movement between mating parts, maintaining dimensional accuracy and repeatability in modular connection systems.
Working Principle
Utilizes interference fit or clearance fit in precisely machined holes to establish and maintain accurate positional relationship between modular components. The dowel/pin engages with corresponding holes in mating parts, creating a fixed reference point that ensures proper alignment while allowing for thermal expansion and manufacturing tolerances.
Materials
Typically made from hardened alloy steel (AISI 4140, 4340), stainless steel (304, 316), or tool steel (D2, O1) with surface treatments including nitriding, chrome plating, or black oxide coating for wear resistance and corrosion protection.
Technical Parameters
  • Hardness 58-62 HRC (hardened steel)
  • Straightness 0.01mm per 100mm
  • Concentricity 0.005mm
  • Surface Finish Ra 0.4-0.8μm
  • Length Tolerance ±0.1mm
  • Diameter Tolerance h6/h7 (ISO)
Standards
ISO 8734, DIN 6325, ISO 2338, DIN 7

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Alignment Dowel/Pin.

alignment dowel positioning pin machine alignment modular interface precision dowel industrial pins machine components alignment components Alignment Dowel/Pin Alignment Dowel/Pin in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Modular Connection Interface

A standardized interface component that enables secure and repeatable connections between modular tooling fixtures and workpieces or other fixtures.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Misalignment due to worn dowels
  • Shear failure under excessive loads
  • Corrosion in harsh environments
  • Improper installation causing damage
  • Thermal expansion mismatch
FMEA Triads
Trigger: Wear from repeated assembly/disassembly
Failure: Reduced positional accuracy leading to machine misalignment
Mitigation: Implement regular inspection schedule, use wear-resistant coatings, establish replacement intervals based on usage cycles
Trigger: Incorrect installation force
Failure: Deformation of dowel or mating components
Mitigation: Use calibrated installation tools, follow manufacturer torque specifications, provide proper training for assembly personnel
Trigger: Corrosive environment exposure
Failure: Seizure or difficult removal during maintenance
Mitigation: Select corrosion-resistant materials (stainless steel), apply protective coatings, implement regular lubrication schedule

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 2768-mK for general tolerances, specific geometric tolerances per ISO 1101
Test Method
Coordinate measuring machine (CMM) verification, surface roughness testing per ISO 4287, hardness testing per ISO 6508

Buyer Feedback

★★★★☆ 4.5 / 5.0 (26 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Alignment Dowel/Pin meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Alignment Dowel/Pin arrived with full certification."

"Great transparency on the Alignment Dowel/Pin components. Essential for our Machinery and Equipment Manufacturing supply chain."

Related Components

Inspection Frame
Structural support component in automated fabric inspection systems that holds cameras, sensors, and lighting for defect detection.
Machine Frame
The rigid structural foundation of a CNC wood router that provides stability, vibration damping, and precision alignment for cutting operations.
pH Sensor Assembly
Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications
Load Cell Assembly
Precision load cell assembly for automated powder dispensing systems

Frequently Asked Questions

What is the difference between a dowel pin and an alignment pin?

Dowel pins typically refer to precision cylindrical pins with tight tolerances for permanent or semi-permanent alignment, while alignment pins may include various designs (tapered, shouldered) for temporary alignment during assembly. Both serve similar positioning functions but differ in application methods and removal requirements.

How do I select the correct alignment dowel size?

Select based on: 1) Required positional accuracy (tighter tolerances for higher precision), 2) Load requirements (shear strength), 3) Material compatibility (corrosion resistance), 4) Assembly method (press fit vs. slip fit), and 5) Industry standards applicable to your equipment.

Can alignment dowels be reused?

Hardened steel dowels with proper surface treatments can typically be reused if they maintain dimensional accuracy and surface integrity. However, press-fit dowels may require replacement after disassembly due to potential deformation or wear in the mating holes.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Get Quote for Alignment Dowel/Pin

Alignment Dowel Holes Alignment Feature