Structured Manufacturing Data (2026)

Lead Screw / Rack

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Lead Screw / Rack 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 Lead Screw / Rack is characterized by the integration of Threads and Shaft/Body. In industrial production environments, manufacturers listed on CNFX commonly emphasize Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A mechanical component that converts rotational motion into linear motion for precise depth positioning.

Product Specifications

Technical details and manufacturing context for Lead Screw / Rack

Definition
A lead screw or rack is a critical component within depth adjustment mechanisms, providing controlled linear movement through either screw threads (lead screw) or gear teeth (rack) to achieve accurate positioning and depth control in various industrial applications.
Working Principle
The lead screw operates by converting rotational motion from a motor or handwheel into linear displacement through threaded engagement, while the rack works with a pinion gear to translate rotational motion into linear movement along its length.
Common Materials
Steel, Stainless Steel, Brass
Technical Parameters
  • Lead/pitch specification determining linear movement per revolution (mm) Standard Spec
Components / BOM
  • Threads Part
    Engage with nut or mating component to create linear motion
    Material: steel
  • Shaft/Body Part
    Main structural element providing strength and rigidity
    Material: steel
  • End Machining Part
    Prepared ends for bearing mounting or coupling attachment
    Material: steel

Industry Taxonomies & Aliases

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

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: 500N to 50kN depending on size/material, consult manufacturer for specific ratings
other spec: Maximum linear speed: 0.5-2 m/s, positioning accuracy: ±0.01mm to ±0.1mm, backlash: 0.05-0.2mm
temperature: -40°C to 120°C (standard), up to 200°C with special materials/lubrication
Media Compatibility
✓ Industrial machinery positioning systems ✓ CNC machine tool axes ✓ Precision laboratory equipment
Unsuitable: High-vibration environments without damping mechanisms or corrosive chemical exposure without protective coatings
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 on screw threads or rack teeth from insufficient lubrication, misalignment, or overloading, leading to lost motion and reduced precision.
Thread or Tooth Wear/Damage
Cause: Abrasive contamination, improper lubrication, or excessive cyclic loading causing pitting, galling, or stripping of the mating surfaces.
Maintenance Indicators
  • Audible grinding, clicking, or squeaking during operation indicating contamination, misalignment, or severe wear.
  • Visible metal shavings or debris around the assembly, or excessive play/wobble when manually checking for backlash.
Engineering Tips
  • Implement a strict lubrication schedule using the correct grade of grease or oil, and ensure seals or covers are intact to prevent contamination.
  • Regularly check and adjust alignment between the screw/rack and mating components (e.g., nut or pinion), and avoid overloading beyond the design specifications.

Compliance & Manufacturing Standards

Reference Standards
ISO 3408: Lead screws - Nominal diameters and pitches ANSI/ASME B1.5: Acme Screw Threads DIN 103: Trapezoidal screw threads - General plan
Manufacturing Precision
  • Pitch accuracy: +/-0.01mm per 300mm
  • Straightness: 0.05mm per 100mm
Quality Inspection
  • Thread profile verification using optical comparators
  • Hardness testing (Rockwell C scale) for material compliance

Factories Producing Lead Screw / Rack

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 applications of lead screws and racks in machinery manufacturing?

Lead screws and racks are essential for precision linear motion in CNC machines, 3D printers, automated assembly lines, and positioning systems where accurate depth control is required.

How do I choose between steel, stainless steel, and brass materials for my application?

Steel offers high strength for heavy loads, stainless steel provides corrosion resistance for harsh environments, and brass offers excellent wear resistance and smooth operation with lower maintenance requirements.

What specifications should I consider when ordering custom lead screws?

Key specifications include thread pitch, diameter, length, material grade, tolerance levels, end machining requirements, and load capacity to ensure compatibility with your machinery's performance needs.

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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