Structured Manufacturing Data (2026)

Ball Screw Shaft

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Ball Screw Shaft 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 Shaft is characterized by the integration of Threaded Section and Shaft Body / Journal. In industrial production environments, manufacturers listed on CNFX commonly emphasize Alloy Steel (e.g., SCM420, SCM440) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The precision-ground shaft that forms the core of a ball screw assembly, converting rotary motion into linear motion.

Product Specifications

Technical details and manufacturing context for Ball Screw Shaft

Definition
A critical component within linear guideways and ball screw systems, the ball screw shaft is a hardened and ground cylindrical rod with a helical groove (thread) machined along its length. It serves as the primary load-bearing element that interacts with the ball nut, enabling precise linear positioning and force transmission in industrial machinery.
Working Principle
The shaft rotates within a stationary or moving ball nut. The recirculating balls within the nut roll along the matching helical grooves on the shaft, minimizing friction and converting the shaft's rotary motion into highly efficient, precise linear motion of the nut or the shaft itself.
Common Materials
Alloy Steel (e.g., SCM420, SCM440), Stainless Steel
Technical Parameters
  • Nominal diameter of the shaft, a primary dimension defining the screw's size and load capacity. (mm) Customizable
Components / BOM
  • Threaded Section Part
    The precision-ground helical groove that guides the recirculating balls, defining the screw's lead and accuracy.
    Material: Hardened Alloy Steel
  • Shaft Body / Journal Part
    The smooth, unthreaded sections at the ends for mounting bearings and couplings, providing rotational support.
    Material: Alloy Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Ball Screw Shaft.

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: Axial load capacity: 5 kN to 500 kN depending on diameter and preload
other spec: Maximum linear speed: 3 m/s, Accuracy grade: C3 to C7 per ISO 3408
temperature: -20°C to 120°C (standard), up to 200°C with special materials
Media Compatibility
✓ Machine tool cutting fluids ✓ Industrial lubricating oils ✓ Clean hydraulic fluids
Unsuitable: Abrasive slurry environments without protective seals
Sizing Data Required
  • Required axial load capacity (kN)
  • Maximum travel length (mm)
  • Required positioning accuracy (μm/300mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Wear and pitting
Cause: Inadequate lubrication leading to metal-to-metal contact, or contamination from abrasive particles in the environment.
Fatigue fracture
Cause: Cyclic overloading, misalignment causing uneven stress distribution, or material defects from manufacturing.
Maintenance Indicators
  • Audible grinding or clicking noises during operation
  • Visible backlash or excessive play in the linear motion
Engineering Tips
  • Implement a strict lubrication schedule using manufacturer-recommended grease or oil, and ensure seals are intact to prevent contamination.
  • Regularly check and correct alignment with the drive system and mounting surfaces to avoid eccentric loading and premature wear.

Compliance & Manufacturing Standards

Reference Standards
ISO 3408-1:2006 (Ball screws - Part 1: Vocabulary and designation) ANSI B5.48-1977 (Ball Screws) DIN 69051-1:2001 (Ball screws - Part 1: General characteristics, designations)
Manufacturing Precision
  • Lead accuracy: ±0.01 mm per 300 mm
  • Shaft diameter tolerance: h6 (-0.013 mm to 0 mm)
Quality Inspection
  • Lead accuracy measurement with laser interferometer
  • Hardness testing (Rockwell C scale) of screw shaft surface

Factories Producing Ball Screw Shaft

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 ball screw shafts typically made from?

Ball screw shafts are commonly manufactured from alloy steels like SCM420 or SCM440 for high strength and durability, or stainless steel for corrosion resistance in harsh environments.

What are the main components of a ball screw shaft?

The two primary components are the threaded section where the ball nut travels, and the shaft body/journal that provides structural support and mounting surfaces for bearings and couplings.

How does a ball screw shaft convert motion?

The precision-ground threads on the shaft interface with a ball nut containing recirculating balls, converting the rotary motion of the shaft into precise linear motion of the nut along the shaft axis.

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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