Structured Manufacturing Data (2026)

Shaft and Bearing

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Shaft and Bearing used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Shaft and Bearing is characterized by the integration of Shaft and Bearing. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A mechanical assembly consisting of a rotating shaft supported by bearings, enabling precise angular positioning and smooth rotation within a variable capacitor.

Product Specifications

Technical details and manufacturing context for Shaft and Bearing

Definition
In a variable capacitor, the shaft and bearing assembly is a critical mechanical component that facilitates the adjustment of capacitance. The shaft provides the rotational axis for moving plates, while the bearings ensure minimal friction and precise alignment, allowing for accurate tuning and stable operation of the capacitor across its adjustment range.
Working Principle
The shaft transmits rotational force from the tuning knob to the capacitor's moving plates. Bearings (typically ball or sleeve bearings) reduce friction between the rotating shaft and the stationary housing, enabling smooth, low-torque rotation and maintaining precise axial and radial alignment for consistent electrical performance.
Common Materials
Stainless Steel, Brass, Bronze
Technical Parameters
  • Shaft diameter and length, bearing inner/outer diameter, and overall assembly tolerance for fit and alignment. (mm) Standard Spec
Components / BOM
  • Shaft Part
    Provides the central rotating axis for moving capacitor plates.
    Material: Stainless Steel
  • Bearing
    Supports the shaft, reduces friction, and maintains alignment.
    Material: Bronze or Stainless Steel
  • Retaining Clip Part
    Secures the bearing in place within the housing.
    Material: Spring Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Shaft and Bearing.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 2 bar (sealed bearing dependent)
other spec: Max rotational speed: 10,000 RPM (bearing dependent), Radial load capacity: 500 N max, Axial load capacity: 200 N max
temperature: -40°C to +120°C (standard bearing grease range)
Media Compatibility
✓ Dry air/nitrogen environments ✓ Lubricated mechanical systems ✓ Clean electrical/electronic assemblies
Unsuitable: Abrasive slurry or particulate-laden environments
Sizing Data Required
  • Shaft diameter and tolerance (mm)
  • Required angular positioning accuracy (degrees/arc-minutes)
  • Maximum rotational speed and torque requirements (RPM, Nm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue spalling
Cause: Cyclic loading exceeding material endurance limit, often due to misalignment, imbalance, or improper preload, leading to subsurface crack initiation and propagation.
Adhesive wear (scoring/galling)
Cause: Insufficient lubrication, contamination, or excessive load causing metal-to-metal contact and material transfer between shaft and bearing surfaces.
Maintenance Indicators
  • High-frequency vibration or audible squealing/grinding noises during operation
  • Rapid temperature rise in bearing housing (>70°C above ambient) or visible lubricant leakage/discoloration
Engineering Tips
  • Implement precision alignment (laser/optical) and dynamic balancing to minimize cyclic stresses; use proper interference fits per ISO standards.
  • Establish condition-based lubrication with filtered oil or high-quality grease, monitoring particle counts and moisture levels regularly.

Compliance & Manufacturing Standards

Reference Standards
ISO 286-1:2010 (Geometrical product specifications - ISO code system for tolerances on linear sizes) ANSI/ABMA 9:1990 (Load Ratings and Fatigue Life for Ball Bearings) DIN 7190:2001 (Interference fits - Calculation and design rules)
Manufacturing Precision
  • Shaft diameter tolerance: h6 (e.g., 50mm shaft: +0/-0.016mm)
  • Bearing bore tolerance: H7 (e.g., 50mm bore: +0.025/+0mm)
Quality Inspection
  • Dimensional verification with coordinate measuring machine (CMM)
  • Hardness testing (Rockwell C scale for bearing races)

Factories Producing Shaft and Bearing

Manufacturer profiles with relevant production capability in China

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

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 used in this shaft and bearing assembly?

This assembly is constructed from high-quality stainless steel for the shaft, with brass and bronze components in the bearing system to ensure durability, corrosion resistance, and smooth operation in electronic applications.

How does this assembly enable precise angular positioning in variable capacitors?

The precisely machined shaft rotates smoothly within high-tolerance bearings, allowing accurate control of angular position. This is critical for adjusting capacitance values in variable capacitors used in tuning circuits, filters, and RF applications.

What is included in the BOM for this shaft and bearing assembly?

The bill of materials includes the main rotating shaft, the supporting bearing system, and a retaining clip to secure components. This complete assembly is ready for integration into computer, electronic, and optical manufacturing processes.

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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