China Miniature Ball Screws Manufacturers Suppliers Factory - Made in China

Precision Miniature Ball Screws for Compact Automation

Engineered for Space-Constrained Systems Requiring Sub-Micron Positioning, Zero Backlash, and High Rigid Performance

Miniature High Lead Ball Screws
Miniature High Lead Ball Screws integrate compact shaft diameters with multi-start thread profiles to achieve fast linear travel at low rotational speeds. Designed for compact precision equipment,
Miniature Stainless Steel Ball Screws
Miniature Stainless Steel Ball Screws provide rotary-to-linear conversion in tight mechanical assemblies, featuring shaft diameters from 3 mm to 12 mm. Built with Martensitic SUS440C stainless steel
Miniature Preloaded Ball Screws
Miniature Preloaded Ball Screws with shaft diameters from 3 mm to 12 mm deliver zero-backlash motion control, axial rigidity, and precise positioning within compact machine envelopes. Ground Gothic
Miniature Flanged Ball Screws
Miniature Flanged Ball Screws incorporate an integrated nut flange into compact screw diameters from 4 mm to 12 mm. This structural design enables direct face mounting without adapter brackets,
Miniature Double Nut Ball Screws
Miniature double nut ball screws deliver backlash-free precision motion control within tight installation envelopes. Utilizing a ground axial spacer between two nuts, these assemblies eliminate
Miniature Single Nut Ball Screws
Miniature Single Nut Ball Screws convert rotary motion into high-precision linear movement within confined spaces. Built with nominal shaft diameters from 3 mm to 12 mm, these components deliver

Category Overview

Miniature ball screws feature nominal shaft diameters from 3 mm to 12 mm with lead options as fine as 0.5 mm. Utilizing precision ground gothic arch thread profiles, these compact assemblies achieve mechanical efficiency above 90 percent compared to conventional sliding lead screws. The low-inertia design makes them suitable for micro-positioning drives in medical analytical devices, semiconductor wafer handling, and optical measurement equipment.

Product Structure and Mounting Options

Flanged Single Nut Style

Integrated mounting flange allows direct rigid bolting to mobile stages and linear motion carriages.

Cylindrical Single Nut Style

Smooth external body without a flange minimizes radial mounting space inside tight machine housings.

Threaded Nut Style

External threads machined directly on the nut body enable secure screw-in installation in compact bores.

Key Technical Parameters

Parameter	Specification & Range
Shaft Diameter Range	3 mm to 12 mm
Lead Options	0.5 mm to 10 mm
Accuracy Grades	JIS C3, C5, C7 (ISO Class 3, 5, 7)
Axial Play / Backlash	Standard axial play under 0.05 mm; zero-backlash preloaded units available
Raw Materials	Stainless steel 440C (SUS440C) or Alloy steel 50CrMo4
Circulation Systems	Internal ball deflector or precision end cap recirculation
Operating Temperature	-20 to +80 °C (Standard); Up to +150 °C (High-temp synthetic grease)

Engineering Advantages

High Positioning Accuracy
Ground thread profiles deliver C3 grade lead accuracy within 0.008 mm per 300 mm stroke.

Compact Footprint
Nut outer diameters starting from 8 mm maximize effective stroke length in restricted assembly space.

Corrosion Resistance
Passivated 440C stainless steel construction prevents surface oxidation in cleanroom operating environments.

Low Driving Torque
Uniform ball raceway geometry ensures consistent contact angles and reduces motor power input requirements.

Application Fields

Medical Instrumentation

Micro-dosing reagent pumps, automated blood analyzers, and precision surgical robotics.

Semiconductor Manufacturing

Silicon wafer inspection stages, wire bonding equipment, and automated pick-and-place heads.

Optical Measurement Devices

Motorized lens focusing mechanisms and automated laser positioning platforms.

Selection Guide

Calculate Axial Loads

Select nominal shaft diameter from 3 mm to 12 mm based on dynamic load calculations and required fatigue life.

Match Lead to Speed

Determine screw lead by balancing motor rotational speed with target linear travel velocity.

Specify Accuracy Grade

Select C3 or C5 precision ground threads for sub-micron positioning, or C7 rolled threads for transport applications.

Confirm Nut Configuration

Choose flange, cylindrical, or threaded nut geometry to match physical mounting constraints.

Customization and OEM Services

Custom Shaft End Machining
Journal dimensions, keyways, snap ring grooves, and internal threads machined strictly according to customer 2D and 3D CAD drawings.

Surface Treatment Options
Electroless nickel plating, black oxide finishing, and corrosion-resistant thin chrome coatings.

Specialized Lubrication
Vacuum-grade synthetic oils, low-outgassing cleanroom grease, and solid lubricant coatings.

Manufacturing and Quality Standards

01/

Full In-House Production
Complete control over thread grinding, heat treatment, surface processing, and dynamic torque testing.

02/

Complete Optical Inspection
Every screw assembly undergoes pitch lead error measurement and runout verification before final packing.

03/

CAD Modeling Support
3D STEP files generated and sent for engineering validation within 24 hours of technical review.

04/

Scalable Production Capacities
Dedicated tooling and production lines support custom prototype lots through high-volume production schedules.

FAQ

Q: What is the minimum shaft diameter available for miniature ball screws?

A: Miniature ball screws start at a 3 mm nominal outer shaft diameter with a 0.5 mm lead.

Q: Can miniature ball screws be supplied with zero backlash?

A: Zero-backlash operation is achieved through selective steel ball sizing or preloaded double-nut configurations depending on installation space.

Q: Which materials are recommended for cleanroom applications?

A: Martensitic stainless steel 440C paired with specialized fluorinated cleanroom grease is standard for contamination-sensitive environments.

Q: Is custom shaft end machining available according to drawing specifications?

A: Shaft ends are machined precisely to your engineering CAD drawings, including bearing journal seats, retention ring grooves, and motor drive flats.

Q: What is the standard production time for customized miniature ball screws?

A: Standard prototypes ship within 7 to 10 working days. Precision ground variants or complex custom shaft ends typically ship within 15 to 20 working days.

Request a Technical Quote & CAD Verification

Submit your CAD drawings or operating specifications to receive engineering verification and factory-direct unit pricing within 24 hours.

Request a Technical Quote

As one of the leading miniature ball screws manufacturers and suppliers in China, we warmly welcome you to wholesale customized miniature ball screws made in China here from our factory. For quotation, contact us now.