Structured Manufacturing Data (2026)

End Supports/Bearings

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard End Supports/Bearings 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 End Supports/Bearings is characterized by the integration of Support Housing and Bearing Set. In industrial production environments, manufacturers listed on CNFX commonly emphasize Bearing steel (e.g., GCr15/52100) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Structural components that provide mounting points and rotational support for ball screw ends within mechanical assemblies.

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Product Specifications

Technical details and manufacturing context for End Supports/Bearings

Definition
End supports/bearings are critical components in ball screw assemblies that serve as mounting interfaces and provide precise rotational support for the screw shaft ends. They ensure proper alignment, minimize deflection, and facilitate smooth linear motion by supporting axial and radial loads while allowing controlled rotation. These components typically integrate with machine frames or housings and work in conjunction with the ball nut to maintain system accuracy and longevity.
Working Principle
End supports/bearings function by providing rigid mounting points that secure the ball screw shaft ends while incorporating bearing elements (such as angular contact bearings or deep groove ball bearings) that allow controlled rotation. They distribute operational loads (axial, radial, and moment loads) from the screw shaft to the machine structure, maintaining alignment precision and reducing vibration. The bearing arrangement within the support accommodates thermal expansion and compensates for minor misalignments while ensuring minimal friction during screw rotation.
Common Materials
Bearing steel (e.g., GCr15/52100), Carbon steel, Alloy steel, Aluminum alloy (for housings)
Technical Parameters
  • Bore diameter (inner diameter where screw shaft mounts), outer diameter, width/thickness, mounting hole pattern dimensions, and overall support dimensions (mm) Standard Spec
Components / BOM
  • Support Housing Part
    Provides structural mounting interface to machine frame and encloses bearing components
    Material: Carbon steel or aluminum alloy
  • Bearing Set
    Facilitates smooth rotation of screw shaft while supporting axial and radial loads
    Material: Bearing steel (GCr15/52100)
  • Seals/Gaskets Part
    Protect bearing internals from contamination and retain lubrication
    Material: Rubber or synthetic polymer
  • Mounting Flange Part
    Interface with machine structure via bolt holes for secure attachment
    Material: Carbon steel
  • Preload Adjustment Mechanism
    Allows precise adjustment of bearing preload for optimal performance (in some designs)
    Material: Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for End Supports/Bearings.

ball screw end support bearings machinery equipment bearing housings rotational support bearing assemblies preload adjustment end bearings industrial ball screw mounting components

Applied To / Applications

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

Ball Screw Assembly
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Linear Actuator/Guide
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Max axial load: 500-5000 N (depending on size), Max radial load: 200-2000 N
other spec: Max rotational speed: 3000-5000 RPM, Vibration tolerance: ≤5g, Lubrication interval: 1000-5000 hours
temperature: -40°C to +120°C (standard), up to +200°C with special materials
Media Compatibility
✓ Industrial machinery lubrication oils/greases ✓ Clean air environments ✓ Dry mechanical assemblies with minimal particulate
Unsuitable: High-concentration abrasive slurry or corrosive chemical environments
Sizing Data Required
  • Ball screw shaft diameter and tolerance
  • Required axial/radial load capacity
  • Mounting configuration and space constraints

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fatigue spalling
Cause: Cyclic loading exceeding material endurance limit, often from misalignment, excessive preload, or inadequate lubrication leading to subsurface crack propagation.
Corrosion pitting
Cause: Exposure to moisture, chemicals, or corrosive atmospheres without proper sealing or protective coatings, accelerated by galvanic reactions with dissimilar metals.
Maintenance Indicators
  • Abnormal high-frequency vibration or audible grinding/scraping noises during operation
  • Visible discoloration (blue/brown heat tinting) or rust formation on bearing surfaces or adjacent components
Engineering Tips
  • Implement precision laser alignment during installation and periodic checks to ensure shaft parallelism within 0.002 inches per foot, reducing uneven load distribution.
  • Establish condition-based lubrication with filtered oil or high-quality grease, using ultrasound or vibration analysis to determine optimal re-lubrication intervals rather than fixed schedules.

Compliance & Manufacturing Standards

Reference Standards
ISO 1132-1:2000 (Rolling bearings - Tolerances - Part 1: Terms and definitions) ANSI/ABMA 20:1996 (Radial Bearings of Ball, Cylindrical Roller, and Spherical Roller Types - Metric Design) DIN 5412-1:2016 (Rolling bearings - Tapered roller bearings - Boundary dimensions and series designations)
Manufacturing Precision
  • Bore diameter tolerance: +/-0.01mm for precision class P5
  • Radial runout tolerance: 0.005mm for high-precision applications
Quality Inspection
  • Ultrasonic testing for internal defects and material homogeneity
  • Hardness testing (Rockwell C scale) to verify heat treatment compliance

Factories Producing End Supports/Bearings

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.

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 best for end support bearings in heavy machinery applications?

For heavy machinery, bearing steel (GCr15/52100) or alloy steel provides optimal durability and load capacity, while aluminum alloy housings offer lightweight corrosion resistance.

How does the preload adjustment mechanism affect ball screw performance?

Proper preload adjustment eliminates axial play, reduces vibration, and extends ball screw life by maintaining consistent contact between components under varying loads.

What maintenance do end support bearings require in manufacturing equipment?

Regular lubrication of bearing sets, inspection of seals/gaskets for contamination, and periodic preload verification ensure reliable operation in continuous manufacturing environments.

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 for Machinery and Equipment Manufacturing.

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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