Structured Manufacturing Data (2026)

Shaft Assembly

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Shaft Assembly 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 Shaft Assembly is characterized by the integration of Shaft Body and Keyway. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A rotating mechanical component that transmits torque and supports rotating elements within a vacuum pump/motor system.

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Product Specifications

Technical details and manufacturing context for Shaft Assembly

Definition

The shaft assembly in a vacuum pump/motor is a critical rotating component that serves as the central structural element connecting the motor to the pump mechanism. It transmits rotational force from the motor to the pump's impeller or rotor, maintains precise alignment of rotating parts, and supports bearings and seals that ensure proper vacuum operation and prevent leakage.

Working Principle

The shaft assembly rotates at high speeds driven by the motor, transferring mechanical energy to the pump's compression mechanism. It maintains rigidity and balance while operating under vacuum conditions, with precise tolerances to minimize vibration and ensure efficient power transmission between the motor and pump sections.

Common Materials

Stainless Steel, Alloy Steel

Technical Parameters

Shaft diameter, length, and runout tolerance critical for proper fit and alignment within the pump/motor assembly (mm) Per Request

Components / BOM

Shaft Body Part
Main structural element that transmits torque and supports rotating components

Material: Alloy Steel
Keyway Part
Machined slot for securing impellers, gears, or couplings to prevent slippage

Material: Same as shaft body
Bearing Journals Part
Precision-machined surfaces where bearings are mounted to support rotation

Material: Hardened Steel
Seal Surface Part
Smooth, polished area where mechanical seals or packing glands create vacuum seal

Material: Stainless Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Shaft Assembly.

Applied To / Applications

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

Vacuum Pump/Motor

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High-Shear Rotor-Stator Assembly

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Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 10 bar (absolute) in vacuum service
other spec:	Max rotational speed: 15,000 RPM, Torque capacity: 50 Nm, Vacuum level: 10^-3 mbar
temperature:	-40°C to 200°C

Media Compatibility

✓ Dry inert gases (N2, Ar) ✓ Lubricating oils (ISO VG 32-68) ✓ Clean process gases

Unsuitable: Abrasive slurries or particulate-laden fluids

Sizing Data Required

Shaft diameter and length
Required torque transmission
Operating vacuum pressure range

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Fatigue fracture

Cause: Cyclic loading leading to crack initiation and propagation, often at stress concentrators like keyways or fillets, exacerbated by misalignment or improper installation.

Bearing surface wear

Cause: Inadequate lubrication, contamination (e.g., dirt, moisture), or improper bearing fit causing abrasive or adhesive wear, leading to increased clearance and vibration.

Maintenance Indicators

Excessive vibration or audible knocking during operation, indicating imbalance, misalignment, or bearing failure.
Visible shaft wobble or discoloration (e.g., blueing from overheating) at bearing or seal points, suggesting thermal stress or lubrication issues.

Engineering Tips

Implement precision alignment and balancing during installation using laser alignment tools to minimize dynamic stresses and prevent premature fatigue.
Establish a rigorous lubrication management program with scheduled oil analysis and contamination control to ensure proper film strength and cleanliness.

Compliance & Manufacturing Standards

Reference Standards

ISO 286-1:2010 (Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes) ANSI B4.1-1967 (Preferred Limits and Fits for Cylindrical Parts) DIN 7184-1 (Shaft-hub connections - Part 1: Press fits)

Manufacturing Precision

Shaft diameter: +/-0.01mm (for precision fits)
Runout tolerance: 0.05mm (for rotational accuracy)

Quality Inspection

Dimensional verification with coordinate measuring machine (CMM)
Hardness testing (Rockwell or Brinell scale)

Factories Producing Shaft Assembly

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are available for this shaft assembly?

Our shaft assemblies are manufactured from high-grade Stainless Steel or Alloy Steel, selected for durability, corrosion resistance, and strength in demanding industrial environments.

What are the key components of this shaft assembly?

The assembly includes a Shaft Body, precision-machined Keyway for secure coupling, Bearing Journals for smooth rotation support, and a Seal Surface to maintain system integrity in vacuum applications.

What is the primary function of this shaft assembly?

This rotating mechanical component transmits torque and provides critical support for rotating elements within vacuum pump and motor systems, ensuring reliable operation in machinery and equipment.

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.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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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