Ball Screw and Lead Screw: Precision Linear Actuator Component

Product Specifications

Technical details and manufacturing context for Ball Screw or Lead Screw

Definition

A ball screw or lead screw is a mechanical component used to convert rotational motion into precise linear motion. It is a critical part of the Precision Stacking Stage, enabling accurate and repeatable positioning for stacking operations. The component achieves micron-level positioning accuracy through either ball-bearing (ball screw) or sliding (lead screw) mechanisms, ensuring precise movement control required in high-precision manufacturing processes.

Ball screws use recirculating ball bearings that roll between the screw and nut threads, providing high efficiency and low friction. Lead screws, in contrast, have a nut that slides directly along the screw threads, offering self-locking capability but with higher friction. Both types are available in alloy steel or stainless steel, with shaft and nut materials typically specified as GCr15 per GB/T 18254 for wear resistance.

Key parameters, as per ISO 3408, include nominal diameter (16–80 mm), lead (5–40 mm), dynamic load rating (5–120 kN), static load rating (10–250 kN), travel accuracy grade (C3–C7), and backlash (≤0.05 mm). Maximum linear speed ranges from 60 to 120 m/min, and operating temperature is -20 to 80 °C. The IP rating (IP54–IP65) indicates suitability for dusty or wet environments. Weight varies from 2 to 50 kg depending on diameter and length.

These values are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards listed are procurement references and do not guarantee certification or compliance. Proper selection requires considering load, speed, accuracy, and environmental factors. Maintenance signals include increased backlash, unusual noise, or reduced positioning accuracy, indicating wear or lubrication issues. Failure boundaries include exceeding load ratings or operating outside temperature limits, which may cause permanent deformation or material degradation.

Working Principle

Rotational motion from a motor is transmitted to the screw shaft. In ball screws, recirculating ball bearings roll between the screw and nut threads, converting rotation to linear motion with high efficiency. In lead screws, the nut slides directly along the screw threads, providing self-locking capability but with higher friction. The nut moves linearly along the shaft, driving the load. The lead determines linear speed per revolution, and backlash affects positioning accuracy. Proper lubrication and alignment are essential for smooth operation and longevity.

Common Materials

Alloy Steel, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	16–80 mm	Determines load capacity and stiffness.ISO 3408
Lead	5–40 mm	Affects linear speed and resolution.ISO 3408
Dynamic Load Rating	5–120 kN	Basis for life calculation.ISO 3408
Static Load Rating	10–250 kN	Maximum load without permanent deformation.ISO 3408
Travel Accuracy Grade	C3–C7	C3 for high precision, C7 for general use.ISO 3408
Backlash	≤0.05 mm	Lower backlash improves positioning accuracy.ISO 3408
Maximum Linear Speed	60–120 m/min	Limited by critical speed and lubrication.
Operating Temperature	-20–80 °C	Outside range may affect lubrication and material properties.
Shaft Material	GCr15	High carbon chromium bearing steel for wear resistance.GB/T 18254
Nut Material	GCr15	Same as shaft for hardness matching.GB/T 18254
IP Rating	IP54–IP65	Higher IP for dusty or wet environments.IEC 60529
Weight	2–50 kg	Depends on diameter and length.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Screw Shaft Part
Primary rotating component with helical grooves that transmit motion

Material: Alloy Steel
Nut Part
Component that travels along the screw shaft, converting rotational to linear motion

Material: Alloy Steel or Bronze
Ball Bearings (for ball screws) Part
Recirculating elements that reduce friction between screw and nut

Material: Chrome Steel
End Supports Part
Bearings and mounts that support the screw shaft ends

Material: Steel

Applied To / Applications

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

Precision Stacking Stage

View system integration details

Manufacturers of Ball Screw or Lead Screw

Manufacturer profiles associated with Ball Screw or Lead Screw.

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Frequently Asked Questions

What is the difference between a ball screw and a lead screw?

A ball screw uses recirculating ball bearings between the screw and nut, resulting in low friction and high efficiency. A lead screw has a sliding nut, which provides self-locking but higher friction. Ball screws are typically used for high-speed, high-precision applications, while lead screws are suitable for lower-speed, cost-sensitive applications where self-locking is beneficial.

What parameters are critical for selecting a ball screw or lead screw?

Key parameters include nominal diameter, lead, dynamic and static load ratings, travel accuracy grade, backlash, maximum linear speed, operating temperature, and IP rating. These values must be matched to the application's load, speed, accuracy, and environmental requirements. Always verify with the manufacturer for the specific model.

How do I know when a ball screw or lead screw needs maintenance?

Signs of wear include increased backlash, unusual noise, vibration, or reduced positioning accuracy. Regular inspection of lubrication and cleaning of contaminants are recommended. If these symptoms appear, check for wear on the threads or bearings and replace components as necessary.

What are the failure boundaries for this component?

Exceeding the dynamic or static load ratings can cause permanent deformation or fatigue failure. Operating outside the temperature range (-20 to 80 °C) may affect lubrication and material properties. High speeds beyond the maximum linear speed can lead to excessive heat and wear. Always operate within specified limits.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Not applicable (mechanical component, not fluid pressure)
other spec:	Maximum axial load: 1-500 kN depending on size, Maximum speed: 0.1-3 m/s, Accuracy grade: C0-C10 (ISO 3408)
temperature:	-40°C to 120°C (standard), up to 200°C with special materials/lubrication

Ball Screw or Lead Screw

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards