INDUSTRY COMPONENT

Datum Pin / Stop

A precision datum pin or stop used in alignment guides for accurate positioning and repeatable reference points in industrial machinery.

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Component Specifications

Definition
A datum pin or stop is a precision-engineered component integrated into alignment guides to establish fixed reference points, ensuring accurate positioning, alignment, and repeatability of parts or tools during manufacturing, assembly, or inspection processes. It functions as a physical stop or locator to prevent over-travel and maintain consistent positioning.
Working Principle
The datum pin/stop operates by providing a fixed, hardened contact surface that parts or machine components abut against. This creates a repeatable reference point, eliminating positional variability. In alignment guides, it ensures components are consistently positioned relative to a known datum, critical for precision machining, assembly, and quality control.
Materials
Typically made from hardened tool steel (e.g., A2, D2, or O1 steel), stainless steel (e.g., 304 or 416), or carbide for extreme wear resistance. Surface treatments like nitriding, chrome plating, or titanium nitride coating may be applied to enhance durability and corrosion resistance.
Technical Parameters
  • Length 10mm to 100mm
  • Diameter 3mm to 25mm (common range)
  • Hardness 58-62 HRC (for steel)
  • Tolerance ±0.005mm to ±0.02mm
  • Mounting Type Threaded, press-fit, or flange-mounted
Standards
ISO 2768, DIN 6325, ISO 286

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Datum Pin / Stop.

datum pin stop pin alignment guide precision positioning industrial stops machine alignment reference pin tooling components Datum Pin / Stop Datum Pin / Stop in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Alignment Guide

A precision component within a test fixture interface that ensures accurate positioning and alignment of test specimens or devices during measurement or testing procedures.

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Engineering Analysis

Risks & Mitigation
  • Wear and deformation over time
  • Misalignment due to improper installation
  • Corrosion in harsh environments
  • Failure under excessive load leading to positional errors
FMEA Triads
Trigger: Material fatigue or excessive wear
Failure: Loss of dimensional accuracy, causing misalignment
Mitigation: Use wear-resistant materials (e.g., carbide), apply protective coatings, and implement regular inspection and replacement schedules.
Trigger: Improper installation or mounting
Failure: Inconsistent positioning, leading to assembly errors
Mitigation: Follow precise installation procedures, use calibrated tools, and verify alignment during setup with measurement instruments.
Trigger: Exposure to corrosive substances
Failure: Corrosion and pitting, degrading surface integrity
Mitigation: Select corrosion-resistant materials (e.g., stainless steel), apply protective coatings, and maintain clean operating environments.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Typically within ±0.01mm for precision applications, adhering to ISO 2768-mK or tighter standards as required.
Test Method
Dimensional verification using coordinate measuring machines (CMM), optical comparators, or laser scanners; hardness testing per ASTM E18; and wear testing under simulated operational conditions.

Buyer Feedback

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Frequently Asked Questions

What is the primary function of a datum pin in an alignment guide?

Its primary function is to establish a fixed, repeatable reference point that ensures accurate and consistent positioning of parts or tools, critical for precision in manufacturing and assembly processes.

How do I select the right material for a datum pin?

Choose based on application: use hardened tool steel for general wear resistance, stainless steel for corrosion-prone environments, and carbide for high-wear or high-precision applications. Consider factors like load, frequency of use, and environmental conditions.

Can datum pins be customized for specific machines?

Yes, they are often custom-designed to match specific machine interfaces, mounting requirements, and tolerance needs, ensuring optimal compatibility and performance in specialized industrial setups.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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