Structured Manufacturing Data (2026)

Ball Screws/Linear Motors

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Ball Screws/Linear Motors 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 Ball Screws/Linear Motors is characterized by the integration of Screw shaft and Ball nut. In industrial production environments, manufacturers listed on CNFX commonly emphasize High-carbon chromium bearing steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Precision linear motion components that convert rotational motion to linear motion or directly produce linear force for positioning systems.

Product Specifications

Technical details and manufacturing context for Ball Screws/Linear Motors

Definition
Critical actuation components within Multi-Axis Positioning Stages that provide precise linear movement. Ball screws use recirculating ball bearings to translate rotational motion into linear motion with high efficiency and accuracy. Linear motors generate linear force directly through electromagnetic principles without mechanical conversion, enabling high-speed, high-acceleration positioning with minimal backlash and maintenance.
Working Principle
Ball screws operate through a screw shaft and nut with recirculating ball bearings that roll between them, converting torque to thrust. Linear motors work on electromagnetic principles where a magnetic field generated by coils interacts with permanent magnets to produce direct linear force without mechanical contact.
Common Materials
High-carbon chromium bearing steel, Stainless steel, Aluminum alloy, Rare-earth permanent magnets, Copper windings
Technical Parameters
  • Lead/Stroke length - determines linear travel per revolution or electrical cycle (mm) Standard Spec
Components / BOM
  • Screw shaft Part
    Primary rotating element with precision-ground threads that transfers motion
    Material: High-carbon chromium bearing steel
  • Ball nut Part
    Contains recirculating ball bearings that engage with screw threads
    Material: Bearing steel
  • Recirculation system
    Returns balls to starting point in continuous loop
    Material: Stainless steel
  • Forcer/Coil assembly
    Electromagnetic coil assembly that generates moving magnetic field in linear motors
    Material: Copper windings, epoxy resin
  • Magnet track
    Stationary permanent magnet array that interacts with forcer in linear motors
    Material: Rare-earth magnets, aluminum backing

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ball Screws/Linear Motors.

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: Not applicable (mechanical component)
other spec: Max speed: 3 m/s (ball screws), 5 m/s (linear motors); Accuracy: ±5-50 μm/m; Load capacity: 1-100 kN
temperature: -20°C to +80°C (standard), up to +120°C with special seals/lubrication
Media Compatibility
✓ Clean industrial environments ✓ Machine tool applications ✓ Semiconductor manufacturing
Unsuitable: High particulate/dust environments without proper sealing
Sizing Data Required
  • Maximum axial load (N)
  • Required travel length (mm)
  • Positioning accuracy/repeatability (μm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Backlash and Positioning Inaccuracy
Cause: Wear of ball screw nut or ball bearings due to inadequate lubrication, contamination ingress, or excessive axial loads, leading to loss of preload and increased clearance.
Ball Screw Seizure or Binding
Cause: Contamination (e.g., dust, metal chips) entering the recirculation system, combined with lubrication failure, causing abrasive wear, ball jamming, or thread damage.
Maintenance Indicators
  • Audible grinding, clicking, or squealing noises during operation indicating contamination or lubrication issues.
  • Visible metal flakes or discolored grease around the ball nut, signaling excessive wear or overheating.
Engineering Tips
  • Implement a strict lubrication regimen using manufacturer-specified grease or oil, with intervals adjusted for operating speed, load, and environmental contaminants.
  • Install and maintain effective seals or wipers on the ball nut, and use protective bellows or covers in dusty or wet environments to prevent contamination ingress.

Compliance & Manufacturing Standards

Reference Standards
ISO 3408-1:2006 (Ball screws - Part 1: Vocabulary and designation) ANSI B5.48-1977 (Ball Screws) DIN 69051-1:2018 (Ball screw drives - Part 1: General specifications and acceptance conditions)
Manufacturing Precision
  • Lead accuracy: +/-0.005 mm per 300 mm
  • Runout tolerance: 0.01 mm maximum
Quality Inspection
  • Dimensional accuracy verification with CMM (Coordinate Measuring Machine)
  • Dynamic load testing for fatigue life assessment

Factories Producing Ball Screws/Linear Motors

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 are the main differences between ball screws and linear motors?

Ball screws convert rotational motion to linear motion using mechanical components like screw shafts and ball nuts, while linear motors produce direct linear force using electromagnetic principles with forcer coils and magnet tracks, offering higher speeds and precision.

Which materials are best for corrosive environments?

Stainless steel ball screws and aluminum alloy components provide excellent corrosion resistance for machinery operating in humid or chemical environments, while rare-earth magnets in linear motors maintain performance with protective coatings.

How do I maintain ball screw recirculation systems?

Regular lubrication of the ball nut and recirculation system, periodic inspection for wear on balls and tracks, and proper alignment during installation ensure optimal performance and extended service life in industrial applications.

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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