Ball Screw Drive

Product Specifications

Technical details and manufacturing context for Ball Screw Drive

Definition

A ball screw drive is a precision mechanical component used in machinery and equipment manufacturing to convert rotary motion into linear motion with high efficiency and minimal friction. It consists of a screw shaft with helical grooves and a nut containing recirculating ball bearings that roll between the screw and nut surfaces. This design enables smooth, low-friction translation of rotational force into accurate linear movement, making it essential for applications requiring precise positioning, such as CNC machining modules.

The ball screw drive is available in various configurations to meet different application requirements. Key parameters include nominal diameter (16–80 mm), lead (5–40 mm), dynamic load rating (10–120 kN), static load rating (20–250 kN), travel accuracy grade (C3–C7), maximum rotational speed (3000–6000 rpm), operating temperature (-20–80 °C), efficiency (90–98%), backlash (0–0.05 mm), and weight (2–50 kg). These parameters are specified in accordance with ISO 3408, and shaft and nut materials are typically high carbon chromium bearing steel (GCr15) per GB/T 18254.

When selecting a ball screw drive, it is important to verify model-specific values and standards with the legal manufacturer or supplier, as the listed ranges are directory references and may not apply to every product. The choice of diameter, lead, load ratings, and accuracy grade depends on the application's load, speed, and precision requirements. Proper installation, lubrication, and maintenance are critical to ensure long service life and reliable performance.

Potential failure modes include wear, loss of preload, and contamination, which can lead to increased backlash, reduced accuracy, and eventual failure. Regular inspection and maintenance, including checking for unusual noise or vibration, can help detect issues early. Always consult the manufacturer's documentation for specific maintenance intervals and procedures.

Working Principle

When the screw shaft rotates, the ball bearings within the nut recirculate through the helical grooves, causing the nut to move linearly along the screw axis with minimal friction. This mechanism provides high mechanical efficiency (typically 90-95%) and precise positioning by converting rotational torque from the servo motor into controlled linear displacement. The recirculating balls reduce friction compared to sliding contact, enabling smooth and accurate motion. Preload can be applied to eliminate backlash, further enhancing positioning accuracy.

Common Materials

Bearing steel, 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 speed and resolution.ISO 3408
Dynamic Load Rating	10–120 kN	Basis for life calculation.ISO 3408
Static Load Rating	20–250 kN	Maximum load without permanent deformation.ISO 3408
Travel Accuracy Grade	C3–C7	C3 for high precision, C7 for general use.ISO 3408
Maximum Rotational Speed	3000–6000 rpm	Limited by critical speed and nut design.
Operating Temperature	-20–80 °C	Lubricant and material limits.
Efficiency	90–98 %	Higher than lead screws, reduces drive power.
Backlash	0–0.05 mm	Preload reduces backlash for positioning accuracy.
Shaft Material	GCr15	High carbon chromium bearing steel.GB/T 18254
Nut Material	GCr15	Same as shaft for hardness match.GB/T 18254
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
Helical grooved shaft that transmits rotational motion

Material: Hardened alloy steel
Ball Nut
Contains recirculating ball bearings and moves linearly along screw

Material: Bearing steel
Ball Bearings Part
Recirculating elements that reduce friction between screw and nut

Material: Chrome steel
Return System
Channels that guide balls back to starting point in continuous loop

Material: Steel or plastic
Preload Nut Optional
Takes the backlash out of the nut-screw pair on zero-backlash versions.

Applied To / Applications

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

CNC Milling Module

View system integration details

Manufacturers of Ball Screw Drive

Manufacturer profiles associated with Ball Screw Drive.

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Frequently Asked Questions

What is the typical efficiency of a ball screw drive?

Ball screw drives typically have an efficiency of 90-98%, depending on the design and lubrication. This high efficiency reduces drive power requirements compared to lead screws.

How is backlash controlled in a ball screw drive?

Backlash can be minimized by applying preload to the nut, which removes the clearance between the balls and the grooves. Preload reduces backlash to 0-0.05 mm, improving positioning accuracy.

What materials are commonly used for ball screw drives?

Common materials include bearing steel, alloy steel, and stainless steel. The shaft and nut are often made of high carbon chromium bearing steel (GCr15) as per GB/T 18254.

What standards apply to ball screw drives?

Key parameters such as nominal diameter, lead, load ratings, and accuracy grade are specified according to ISO 3408. Material specifications may follow GB/T 18254. Always verify compliance with the manufacturer.

Data Basis

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

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pressure:	Axial load capacity: 1 kN to 500 kN depending on screw diameter and lead
other spec:	Maximum linear speed: 2 m/s, positioning accuracy: ±0.01 mm to ±0.05 mm, life expectancy: 10,000 to 20,000 hours at rated load
temperature:	-20°C to +80°C

Product Specifications

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