Hub Assembly for Infeed Starwheel | Component Specifications

Product Specifications

Technical details and manufacturing context for Hub Assembly

Definition

A hub assembly is the core mechanical component of an infeed starwheel system, serving as the central rotating element that connects to the drive mechanism. It provides precise mounting interfaces for starwheel arms or fingers, ensuring accurate positioning and synchronized movement of containers or products during the infeed process. The hub assembly maintains structural integrity while transmitting rotational force from the drive system to the starwheel assembly. Constructed from materials such as carbon steel, stainless steel, or alloy steel, the hub is designed to withstand operational loads and resist wear. Key dimensional parameters include a bore diameter of 20–50 mm to match the starwheel shaft, a hub diameter of 80–150 mm for mounting space, and an overall width of 40–80 mm affecting arm spacing. Precision requirements include radial runout ≤0.05 mm and axial runout ≤0.08 mm per ISO 1101, surface roughness Ra 0.8–1.6 μm per ISO 1302, and hardness 40–50 HRC per ISO 6508. For alloy steel versions, material grade 40Cr per GB/T 3077 is specified. The hub operates within a temperature range of -20 to 80 °C and a maximum speed of 300–600 rpm, with a weight of 5–15 kg. These values are reference ranges and must be verified for the specific model and application. The hub's design ensures minimal vibration and consistent rotational speed for reliable product handling. Proper selection requires confirming shaft dimensions, load requirements, and environmental conditions. Verification of actual specifications and compliance with applicable standards should be conducted with the legal manufacturer or supplier.

Working Principle

The hub assembly rotates around a central axis driven by a motor or gear system. As it rotates, the mounted starwheel arms or fingers engage with containers or products, guiding them from the infeed conveyor into the processing or packaging line with precise timing and positioning. The hub's design ensures minimal vibration and consistent rotational speed for reliable product handling. The bore diameter matches the shaft, and the hub's precision tolerances maintain alignment. The material and hardness provide wear resistance, while surface roughness ensures proper seal contact. Operating within specified speed and temperature limits prevents excessive wear and vibration.

Common Materials

Carbon Steel, Stainless Steel, Alloy Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bore Diameter	20–50 mm	Matches starwheel shaft size
Hub Diameter	80–150 mm	Determines mounting space
Overall Width	40–80 mm	Affects starwheel arm spacing
Radial Runout	≤0.05 mm	Ensures smooth rotationISO 1101
Axial Runout	≤0.08 mm	Prevents wobbleISO 1101
Surface Roughness	Ra 0.8–1.6 μm	Critical for seal contactISO 1302
Hardness	40–50 HRC	Wear resistanceISO 6508
Material	40Cr	Alloy steel for strengthGB/T 3077
Operating Temperature	-20–80 °C	Beyond this may affect seals
Max Speed	300–600 rpm	Higher speeds may cause vibration
Weight	5–15 kg	Affects inertia

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

Hub Body Part
Main structural element providing mounting surfaces and rotational mass

Material: steel
Mounting Flange Part
Interface for attaching starwheel arms with precision alignment

Material: steel
Bearing Surface Part
Precision-machined surface for smooth rotation and load distribution

Material: hardened steel
Keyway/Spline Part
Mechanical feature for positive drive connection to shaft

Material: steel

Applied To / Applications

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

Infeed Starwheel

View system integration details

Manufacturers of Hub Assembly

Manufacturer profiles associated with Hub Assembly.

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Frequently Asked Questions

What materials are available for the hub assembly?

The hub assembly can be made from carbon steel, stainless steel, or alloy steel. For alloy steel, a common grade is 40Cr per GB/T 3077. The choice depends on the application's strength and corrosion resistance requirements.

What are the critical dimensional parameters?

Key dimensions include bore diameter (20–50 mm) to match the shaft, hub diameter (80–150 mm) for mounting space, and overall width (40–80 mm) affecting arm spacing. These must be confirmed for the specific model.

What precision tolerances are specified?

Radial runout is ≤0.05 mm and axial runout ≤0.08 mm per ISO 1101. Surface roughness is Ra 0.8–1.6 μm per ISO 1302, and hardness is 40–50 HRC per ISO 6508. These ensure smooth rotation and wear resistance.

What are the operating limits?

The hub operates in temperatures from -20 to 80 °C and at speeds up to 300–600 rpm. Weight ranges from 5–15 kg. Exceeding these limits may cause vibration or seal damage. Always verify with the manufacturer.

Data Basis

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

Preliminary Technical Classification

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pressure:	0 to 10 bar
other spec:	Max rotational speed: 60 RPM, Max slurry concentration: 40% solids by weight
temperature:	-20°C to 120°C

Hub Assembly

Product Specifications

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