Main Body / Disc: Load Capacity Up to 2 kg per pocket

Component Specifications

Definition

The Main Body/Disc is the central rotating element of a bottle positioning starwheel, typically mounted on a drive shaft. It features precisely machined pockets or slots that engage with container necks or bodies to accurately position bottles at specific stations in packaging lines. This component ensures smooth transfer, proper alignment, and consistent spacing between containers during high-speed production processes.

Working Principle

The disc rotates synchronously with the conveyor system, using its contoured pockets to capture bottles from an infeed conveyor. As it rotates, it transports bottles through various processing stations (filling, capping, labeling) while maintaining precise positioning and orientation. The disc's rotation speed and pocket geometry determine the indexing accuracy and throughput capacity of the starwheel system.

Materials

Stainless steel (AISI 304 or 316), aluminum alloys (6061-T6), engineering plastics (acetal, polycarbonate), or food-grade polymers. Surface finishes range from machined to polished, with optional coatings for wear resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Max RPM	60-120
Diameter	200-800 mm
Thickness	10-40 mm
Load Capacity	Up to 2 kg per pocket
Pocket Tolerance	±0.1 mm
Number Of Pockets	6-24

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 9001, DIN 8741, FDA CFR 21, EHEDG

Parent Products

This component is used in the following industrial products

Bottle Positioning Starwheel

A rotating component in a capping station that positions bottles precisely for cap application.

View Product Details

Engineering Analysis

Risks & Mitigation

Wear and tear from continuous operation
Misalignment causing bottle jams
Material fatigue under cyclic loading
Contamination in food/pharma applications

FMEA Triads

Trigger: Abrasive wear from container contact
Failure: Increased pocket dimensions leading to positioning errors
Mitigation: Regular dimensional checks, use of wear-resistant materials/coatings, preventive replacement schedules

Trigger: Improper installation or mounting
Failure: Eccentric rotation causing vibration and bottle tipping
Mitigation: Precision alignment during installation, use of dial indicators for runout verification, proper torque application on fasteners

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Positioning accuracy: ±0.5 mm, Runout: ≤0.1 mm TIR, Surface roughness: Ra ≤0.8 μm for food contact

Test Method

Coordinate measuring machine (CMM) verification, runout testing with dial indicator, load testing with calibrated weights, material certification per ASTM/ISO standards

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.

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Manufacturers of Main Body / Disc

Manufacturer profiles associated with Main Body / Disc.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

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A precision-engineered tube in pasteurization systems that maintains precise temperature for pathogen elimination while preserving beverage quality.

Rejection Diverter

A mechanical or pneumatic device that redirects underfilled or overfilled beverage containers from the production line to a rejection area in automated filling verification systems.

Port Flanges

Precision-machined flanges for connecting beverage metering pump heads to piping systems with leak-proof seals.

Valve Stem and Seat

Precision sealing component for aseptic filling valves that controls sterile product flow in beverage manufacturing.

Frequently Asked Questions

What maintenance is required for starwheel discs?

Regular inspection for wear, cleaning to prevent contamination, lubrication of bearings, and verification of pocket dimensions to maintain positioning accuracy.

How do I select the right disc material for my application?

Consider container material (glass, plastic, metal), production environment (wet/dry, chemical exposure), required durability, and compliance standards (FDA, EHEDG). Stainless steel offers durability for harsh environments, while engineering plastics reduce container damage.

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.

Main Body / Disc