Structured Manufacturing Data (2026)

Ball Screw / Lead Screw

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Ball Screw / Lead Screw 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 Screw / Lead Screw is characterized by the integration of Screw Shaft and Nut (Ball or Lead). In industrial production environments, manufacturers listed on CNFX commonly emphasize Alloy Steel (e.g., SCM440, 42CrMo) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A precision mechanical component that converts rotational motion into linear motion with high efficiency and accuracy.

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Product Specifications

Technical details and manufacturing context for Ball Screw / Lead Screw

Definition

Within a Vertical Positioning Actuator, the ball screw or lead screw is the core transmission element responsible for translating the rotational force from a motor into precise vertical linear displacement of the actuator's load platform or carriage. It directly determines the system's positioning accuracy, repeatability, load capacity, and speed.

Working Principle

A threaded shaft (screw) rotates within a matching nut. For a ball screw, recirculating balls roll between the screw and nut grooves, providing low-friction, high-efficiency motion. For a lead screw (or trapezoidal screw), the nut slides directly on the screw threads, offering self-locking capability and simplicity, albeit with lower efficiency.

Common Materials

Alloy Steel (e.g., SCM440, 42CrMo), Stainless Steel (e.g., SUS440C, SUS304)

Technical Parameters

Nominal diameter of the screw shaft (e.g., 16mm, 25mm). (mm) Standard Spec

Components / BOM

Screw Shaft Part
The precision-ground threaded shaft that rotates to generate linear motion.

Material: Alloy Steel / Stainless Steel
Nut (Ball or Lead) Part
The component that travels along the screw shaft, housing the ball recirculation system (for ball screws) or providing the sliding thread interface (for lead screws). It connects to the moving load.

Material: Alloy Steel / Bronze / Engineering Plastic
Ball Retainer / Recirculation System (Ball Screw only) Part
A system of deflectors and return tubes that guides the recirculating balls back to the start of the nut's thread path, enabling continuous motion.

Material: Steel / Plastic
Wipers / Seals Part
Protect the internal threads and recirculation paths from dust, chips, and contaminants.

Material: Rubber / Polyurethane

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ball Screw / Lead Screw.

Applied To / Applications

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

Vertical Positioning Actuator

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits

pressure:	Axial load capacity: 500N to 500kN depending on diameter and lead
other spec:	Maximum linear speed: 1-3 m/s, positioning accuracy: ±0.005mm to ±0.05mm, backlash: 0.001mm to 0.1mm
temperature:	-40°C to 120°C (standard), up to 200°C with special materials/lubrication

Media Compatibility

✓ Machine tool applications (cutting fluids) ✓ Clean room automation (dry operation) ✓ Packaging machinery (food-grade lubricants)

Unsuitable: High-concentration abrasive slurry environments without proper sealing

Sizing Data Required

Required axial load capacity (N)
Maximum travel length (mm)
Required positioning accuracy and repeatability (mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Backlash and Positioning Inaccuracy

Cause: Wear of ball recirculation components, improper preload adjustment, or contamination leading to ball track damage, causing lost motion and reduced precision.

Fatigue Failure of Screw or Nut

Cause: Cyclic loading beyond design limits, improper lubrication causing increased friction and heat, or material defects leading to crack initiation and propagation in the screw shaft or nut body.

Maintenance Indicators

Audible grinding, clicking, or rumbling noises during operation, indicating ball damage, contamination, or loss of lubrication.
Visible metal flakes or discoloration (blueing) on the screw shaft or in the lubricant, signaling excessive wear, overheating, or imminent failure.

Engineering Tips

Implement a strict lubrication regimen using manufacturer-recommended grease or oil, with intervals based on operating speed, load, and environment, to minimize wear and prevent overheating.
Install protective bellows or wipers to seal the screw from contaminants like dust, chips, or moisture, and ensure proper alignment during installation to avoid side loading and premature wear.

Compliance & Manufacturing Standards

Reference Standards

ISO 3408: Ball screws - Vocabulary and designation ANSI B5.48: Ball Screws DIN 69051: Ball screw assemblies; concepts, parameters and calculation

Manufacturing Precision

Lead accuracy: ±0.01 mm/300 mm
Runout: 0.02 mm maximum

Quality Inspection

Hardness testing (Rockwell C scale) for screw and nut components
Dimensional verification with CMM (Coordinate Measuring Machine) for critical features

Factories Producing Ball Screw / Lead Screw

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 is the main difference between ball screws and lead screws?

Ball screws use recirculating ball bearings for higher efficiency and precision, while lead screws use sliding contact with lower efficiency but simpler construction and often lower cost.

Which material is better for corrosive environments: alloy steel or stainless steel?

Stainless steel (SUS304 or SUS440C) is superior for corrosive environments due to its chromium content, while alloy steels like SCM440 require additional coatings or treatments for corrosion resistance.

How do I maintain optimal performance of ball screws in industrial machinery?

Regular lubrication, proper alignment during installation, periodic inspection of wipers/seals, and monitoring for backlash or wear in the recirculation system are essential for maintaining ball screw performance.

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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