INDUSTRY COMPONENT

Alignment Features

Precision alignment features on starwheel bodies for accurate positioning in rotary indexing systems.

Component Specifications

Definition
Alignment features on starwheel bodies are precisely machined surfaces, slots, or reference points designed to ensure accurate angular positioning, radial alignment, and axial location when the starwheel is mounted on a rotary indexing system. These features interface with mating components to maintain consistent orientation and prevent rotational drift during operation.
Working Principle
Alignment features work by providing physical reference surfaces that mate with corresponding features on the drive shaft or mounting hub. This creates a positive mechanical lock that prevents relative movement, ensuring the starwheel maintains its programmed angular position throughout indexing cycles. Common principles include keyway-slot engagement, pin-hole alignment, or flange-face registration.
Materials
Typically made from hardened alloy steel (AISI 4140, 4340), stainless steel (304, 316), or tool steel (D2, A2) with surface hardness of 45-60 HRC. Corrosion-resistant coatings or treatments may be applied.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Hardness50-55 HRC
Feature TypeKeyway, Pin Hole, Flange
Surface FinishRa 0.8 μm or better
Mounting DiameterCustom to application
Alignment Tolerance±0.01 mm

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

Standards
ISO 286-2, DIN 6885

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Misalignment causing product defects
  • Wear leading to positional drift
  • Fatigue failure at stress concentration points
FMEA Triads
Trigger: Improper machining tolerances
Failure: Loose fit leading to rotational play
Mitigation: Implement statistical process control (SPC) during machining, use precision gauging, and specify tighter tolerance classes
Trigger: Material fatigue from cyclic loading
Failure: Crack propagation at keyway corners
Mitigation: Design with generous fillet radii, specify higher fatigue-strength materials, and implement regular inspection schedules

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
ISO 286-2 medium tolerance class for fits, DIN 6885 for keyway dimensions
Test Method
Coordinate measuring machine (CMM) verification, surface plate inspection with dial indicators, go/no-go gauge testing

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 Alignment Features

Manufacturer profiles associated with Alignment Features.

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Frequently Asked Questions

What are the most common types of alignment features on starwheel bodies?

The most common types are keyways (standard or Woodruff), precision pin holes, and registered flange faces. Keyways provide positive rotational locking, pin holes offer radial alignment, and flange faces ensure axial positioning.

How do alignment features affect starwheel performance?

Proper alignment features prevent angular drift, reduce wear on mating components, maintain consistent indexing accuracy, and minimize vibration. Poor alignment leads to premature failure, product misalignment, and reduced machine efficiency.

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.

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