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Positioning Pins/Bushings Component – Machinery and Equipment Manufacturing

Component Specifications

Definition

Positioning pins and bushings are precision-engineered components used in body fixtures and carriers to ensure accurate alignment, repeatable positioning, and secure mounting of workpieces during manufacturing processes. They provide mechanical reference points that eliminate positional errors and maintain dimensional stability throughout production cycles.

Working Principle

These components operate on the principle of mechanical interference and geometric precision. The tapered or cylindrical pin engages with a corresponding bushing to create a precise fit, establishing fixed reference points that constrain movement in specific axes while allowing controlled assembly and disassembly.

Materials

Typically manufactured from hardened alloy steel (AISI 4140, 4340), stainless steel (304, 316), or tool steel with surface treatments like nitriding, chrome plating, or carbide coating for wear resistance. Bushings may incorporate bronze or polymer inserts for reduced friction.

Technical Parameters

Hardness 58-62 HRC
Concentricity 0.01mm TIR
Load Capacity 500-2000N
Surface Finish Ra 0.4μm
Temperature Range -20°C to 150°C
Diameter Tolerance ±0.005mm

Standards

ISO 2768, DIN 6325, ISO 8015

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Positioning Pins/Bushings.

Parent Products

This component is used in the following industrial products

Body Fixture / Carrier

A specialized holding and positioning device used to secure vehicle bodies during interior assembly operations.

View Product Details

Engineering Analysis

Risks & Mitigation

Wear and dimensional degradation over time
Contamination affecting precision
Improper installation causing misalignment
Material fatigue under cyclic loading
Corrosion in harsh environments

FMEA Triads

Trigger: Abrasive wear from repeated insertion/removal cycles
Failure: Increased clearance leading to positional inaccuracies
Mitigation: Implement regular inspection schedules, use hardened materials with wear-resistant coatings, establish replacement intervals based on usage data

Trigger: Contamination by metal chips or debris
Failure: Binding or improper seating causing misalignment
Mitigation: Implement protective covers, regular cleaning protocols, design with self-cleaning features, use sealed bushings where applicable

Trigger: Improper installation force or alignment during assembly
Failure: Component damage or permanent deformation
Mitigation: Use guided installation tools, implement torque-controlled assembly procedures, provide clear installation documentation and training

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Geometric dimensioning and tolerancing per ASME Y14.5, positional tolerance typically ±0.01mm for precision applications

Test Method

Coordinate measuring machine (CMM) verification, functional gaging, laser alignment systems, and periodic calibration against master fixtures

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 positioning pins and bushings?

Positioning pins are the male components that provide the locating feature, while bushings are the female receptacles that receive the pins. Together they create a precise mating system for accurate alignment.

How do I select the right positioning pin for my application?

Consider load requirements, precision needs, material compatibility, environmental conditions, and required tolerance levels. Hardened steel pins with precise diameters are standard for high-accuracy applications.

What maintenance do positioning pins and bushings require?

Regular cleaning to remove debris, lubrication if specified by manufacturer, inspection for wear or damage, and periodic replacement based on usage cycles and wear patterns.

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.

Positioning Pins/Bushings