Bottle Positioning Starwheel

Product Specifications

Technical details and manufacturing context for Bottle Positioning Starwheel

Definition

The Bottle Positioning Starwheel is a component used in the capping station of beverage bottling lines. It is a rotating disc with precisely machined pockets or guides that receive bottles from the infeed conveyor, hold them in a fixed orientation, and transport them through the capping process before releasing them to the outfeed conveyor. Its primary role is to ensure each bottle is correctly aligned and spaced for the capping head to apply a cap accurately and consistently. The starwheel is typically made from stainless steel (e.g., 304 or 316L) or engineering plastics such as acetal or UHMW-PE, depending on the application and environmental requirements. Key parameters include the number of stations (12–48), pitch circle diameter (200–800 mm), bottle diameter range (50–120 mm), bottle height range (100–350 mm), rotation speed (10–60 rpm), positioning accuracy (±0.05 mm), material grade (304/316L per ASTM A240), surface roughness (Ra 0.8–1.6 μm), operating temperature (-40 to 85°C), and weight (15–60 kg). These values are reference ranges and must be confirmed for the specific model and application. The starwheel must be selected based on bottle dimensions, line speed, and capping station layout. Proper installation and maintenance are critical to avoid misalignment, bottle tipping, or cap jams. Regular inspection for wear, surface damage, and bearing condition is recommended. Always verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The starwheel rotates synchronously with the main conveyor line. As bottles enter the capping station, they are guided into the pockets of the starwheel. The rotation of the starwheel transports each bottle to a precise location under the capping head. During this transport, the bottle is held securely in the correct vertical and radial orientation. After the cap is applied, continued rotation releases the bottle back onto the conveyor. The timing and pocket design ensure no bottle tipping or misalignment during the high-speed capping operation.

Common Materials

Stainless Steel (e.g., 304, 316), Engineering Plastic (e.g., Acetal, UHMW-PE)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Number of Stations	12–48 stations	Determines throughput; more stations increase speed but require larger diameter.
Pitch Circle Diameter	200–800 mm	Must match bottle spacing and capping station layout.
Bottle Diameter Range	50–120 mm	Pockets must be sized to grip bottle securely without deformation.
Bottle Height Range	100–350 mm	Affects starwheel thickness and guide rail adjustment.
Rotation Speed	10–60 rpm	Higher speeds require dynamic balancing and precision bearings.
Positioning Accuracy	±0.05 mm	Critical for cap alignment; deviation causes cross-threading or cap jams.
Material Grade	304/316L stainless steel	316L for corrosive environments; 304 for general food contact.ASTM A240
Surface Roughness	Ra 0.8–1.6 μm	Smooth finish prevents bottle scratching and bacterial buildup.
Operating Temperature	-40–85 °C	Exceeding range may cause material degradation or bearing failure.
Weight	15–60 kg	Affects handling and installation; heavier units need robust mounting.

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

Components / BOM

Pocket Insert Part
Forms the specific contour that cradles and guides the bottle. Often replaceable to accommodate different bottle shapes.

Material: Stainless Steel or Engineering Plastic
Main Body / Disc Part
The central rotating structure to which pocket inserts are mounted. Provides rigidity and transmits rotational force.

Material: Stainless Steel or Aluminum
Mounting Hub Part
The central feature for attaching the starwheel to the drive shaft of the capping station.

Material: Stainless Steel

Applied To / Applications

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

Capping Station

View system integration details

Manufacturers of Bottle Positioning Starwheel

Manufacturer profiles associated with Bottle Positioning Starwheel.

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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 · Page last updated 6 September 2026

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Frequently Asked Questions

What is the primary function of a bottle positioning starwheel?

It receives bottles from the infeed conveyor, holds them in a fixed orientation, and transports them through the capping process to ensure accurate cap application.

What materials are commonly used for starwheels?

Stainless steel (e.g., 304 or 316L) and engineering plastics such as acetal or UHMW-PE are typical, depending on the application.

How do I select the right starwheel for my line?

Consider bottle diameter and height, pitch circle diameter, number of stations, rotation speed, and positioning accuracy. Confirm these with the manufacturer for your specific model.

What maintenance is required?

Regularly inspect for wear, surface damage, and bearing condition. Ensure proper lubrication and alignment to prevent misalignment or cap jams.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric (non-pressurized)
other spec:	Max bottle diameter: 150mm, Max throughput: 600 bottles/min, Material hardness: Rockwell C 40-50
temperature:	-10°C to 80°C

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards