Industry-Verified Manufacturing Data (2026)

Starwheel or Pocketed Disc

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Starwheel or Pocketed Disc used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Starwheel or Pocketed Disc is characterized by the integration of Pocket/Cavity and Mounting Hub. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel (e.g., 304, 316) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A rotating disc with precisely shaped pockets that receives, orients, and transfers bottles in an unscrambling system.

Product Specifications

Technical details and manufacturing context for Starwheel or Pocketed Disc

Definition
The starwheel or pocketed disc is a critical component within a bottle unscrambler machine. It is a rotating disc machined with multiple pockets or cavities, each shaped to hold a single bottle in a specific orientation. As the disc rotates, it receives randomly oriented bottles from the infeed, aligns them into the correct upright position within its pockets, and transfers them in a controlled, singularized stream to the downstream conveyor or filling station.
Working Principle
The disc rotates at a controlled speed. Randomly oriented bottles are fed onto or near the disc. The pockets on the disc are designed to only accept bottles in the correct orientation (typically upright). Bottles falling into the pockets are carried by the disc's rotation. Incorrectly oriented bottles are rejected and recirculated. The rotation presents each pocket, now containing a correctly oriented bottle, to a discharge point where the bottle is released onto a conveyor.
Common Materials
Stainless Steel (e.g., 304, 316), Engineering Plastic (e.g., Acetal, UHMW-PE), Cast Aluminum
Technical Parameters
  • Outer Diameter (OD) and thickness of the disc. (mm) Customizable
Components / BOM
  • Pocket/Cavity
    Holds and orients a single bottle during transfer.
    Material: Matches main disc material (e.g., stainless steel)
  • Mounting Hub
    Central fixture for attaching the disc to the drive shaft.
    Material: Steel or Aluminum
  • Wear Liner/Insert (Optional)
    Replaceable lining inside pockets to reduce wear and noise.
    Material: UHMW-PE, Silicone, or other polymers

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Starwheel or Pocketed Disc.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (no pressure rating required for unscrambling)
other spec: Bottle diameter range: 10-150mm, Bottle height range: 30-400mm, Max rotational speed: 60 RPM
temperature: -10°C to 80°C (typical for food/pharma applications)
Media Compatibility
✓ PET bottles ✓ Glass containers ✓ HDPE pharmaceutical vials
Unsuitable: Highly viscous liquids or products requiring aseptic transfer (due to open pocket design)
Sizing Data Required
  • Bottle dimensions (diameter and height)
  • Production rate (bottles per minute)
  • Bottle material/weight

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wear-induced misalignment
Cause: Abrasive particles in the fluid causing progressive erosion of the starwheel teeth or pocket edges, leading to improper engagement and timing errors.
Fatigue cracking
Cause: Cyclic loading from repeated indexing or high-speed operation, often exacerbated by stress concentrations at sharp corners or material defects.
Maintenance Indicators
  • Audible clicking, grinding, or skipping sounds during operation indicating improper engagement
  • Visible wear patterns, chipping, or deformation on the starwheel teeth or pocket edges
Engineering Tips
  • Implement regular lubrication with appropriate viscosity oils to reduce friction and wear, especially in abrasive environments
  • Conduct periodic alignment checks and adjust mounting surfaces to ensure precise engagement and reduce uneven loading

Compliance & Manufacturing Standards

Reference Standards
ISO 1940-1:2003 (Balance quality requirements for rotors) ANSI B94.6-1984 (Knurling) DIN 5480-1:2006 (Splined connections with involute splines)
Manufacturing Precision
  • Bore diameter: +/-0.01 mm
  • Tooth profile accuracy: 0.05 mm
Quality Inspection
  • Coordinate Measuring Machine (CMM) dimensional verification
  • Hardness testing (Rockwell C scale)

Factories Producing Starwheel or Pocketed Disc

Verified manufacturers with capability to produce this product in China

✓ 93% Supplier Capability Match Found

P Procurement Specialist from Germany Jan 06, 2026
★★★★★
"The Starwheel or Pocketed Disc we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."
Technical Specifications Verified
T Technical Director from Brazil Jan 03, 2026
★★★★★
"Found 57+ suppliers for Starwheel or Pocketed Disc on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Project Engineer from Canada Dec 31, 2025
★★★★★
"The technical documentation for this Starwheel or Pocketed Disc is very thorough, especially regarding technical reliability."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

13 sourcing managers are analyzing this specification now. Last inquiry for Starwheel or Pocketed Disc from Poland (1h ago).

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Frequently Asked Questions

What materials are available for starwheel discs in bottle unscrambling systems?

Starwheel discs are typically manufactured from stainless steel (304 or 316 grade), engineering plastics like Acetal or UHMW-PE, or cast aluminum, depending on application requirements for durability, chemical resistance, and weight.

How does a pocketed disc improve bottle handling efficiency?

The precisely shaped pockets in the rotating disc receive randomly oriented bottles, properly orient them, and transfer them to downstream processes, reducing jams and increasing production line speed in packaging systems.

What are the key components of a starwheel assembly?

A typical starwheel assembly includes the main pocket/cavity disc, mounting hub for secure attachment to machinery, and optional wear liners or inserts to extend service life in high-volume applications.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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