China Customized SFU Ball Screws Manufacturers Suppliers Factory - Quotation

DIN 69051 Single Nut Flanged SFU Ball Screws

C5 and C7 Precision Rolled Ground-Thread Ball Screws Engineered for Industrial Automation and CNC Systems

C7 Ball Screws
C7 Ball Screws provide accurate linear motion for standard positioning applications and factory automation. Featuring a cumulative lead tolerance of ±0.050 mm per 300 mm travel, these cold-rolled
C5 Ball Screws
C5 Ball Screws provide dynamic linear positioning with a cumulative lead error of ±0.018 mm per 300 mm stroke. The assembly pairs an induction-hardened alloy steel shaft with a precision-ground
Preloaded Ball Screws
Preloaded Ball Screws eliminate axial play by applying a precise internal force between steel balls and raceways. This construction ensures zero-backlash motion and maximum axial rigidity in
Flanged Ball Screws
Flanged Ball Screws feature an integrated DIN 69051 mounting flange on the nut, delivering maximum axial rigidity and simplified mounting for vertical and horizontal motion systems. Built with
Double Nut Ball Screws
Double Nut Ball Screws incorporate a two-nut structure separated by a precision spacer shim to eliminate axial play and increase systemic drive rigidity. Built for continuous multi-axis motion under
Single Nut Ball Screws
Single Nut Ball Screws deliver continuous linear motion efficiency in a compact flanged profile compliant with DIN 69051 Form B standards. Built by combining precision-rolled or ground shafts with

Category Overview

SFU Ball Screws feature a DIN 69051 Form B flanged single nut with external tube circulation, designed to convert rotary motion into linear positioning with over 90% mechanical efficiency. Manufactured from induction-hardened SCF55 / GCr15 bearing steel, these assemblies deliver axial rigidity and repeatable positioning accuracy down to ±0.018 mm/300mm. Standardized mounting interfaces allow seamless integration into automated machinery, linear actuators, and precision positioning stages.

Product Structure & Types

Nut Configuration: Single flange nut (DIN 69051 Form B standard) with standard circle bolt hole pattern for direct structural mounting.

Circulation System: External return tube mechanism delivering smooth ball recirculation across heavy axial loads.

Precision Grades:
• C7 Rolled: Cumulative lead error ±0.050 mm / 300 mm.
• C5 Precision Rolled / Ground: Cumulative lead error ±0.018 mm / 300 mm.

End Machining: Standard BK/BF, FK/FF support unit processing or custom machining per client engineering drawings.

Technical Specifications

Model Code	Shaft Dia. (mm)	Lead (mm)	Ball Dia. (mm)	Dynamic Load C (kgf)	Static Load C0 (kgf)	Nut Outer Dia. D (mm)	Flange Dia. D1 (mm)
SFU 1204	12	4	2.381	620	1,020	24	40
SFU 1605	16	5	3.175	1,380	3,050	28	48
SFU 1610	16	10	3.175	1,100	2,400	28	48
SFU 2005	20	5	3.175	1,550	3,850	36	58
SFU 2505	25	5	3.175	1,720	4,900	40	62
SFU 2510	25	10	4.762	2,860	6,750	40	62
SFU 3205	32	5	3.175	1,950	6,300	50	80
SFU 3210	32	10	6.35	4,800	12,100	50	80
SFU 4010	40	10	6.35	5,420	15,300	63	93
SFU 5010	50	10	6.35	6,100	19,800	75	110

Material Specifications: Shaft: GCr15 / SCF55 (HRC 58–62); Nut: 20CrMo (HRC 58–62); Steel Balls: GCr15 Class 10.

Axial Clearance: Standard zero-backlash configuration or pre-set axial play within 0.02 mm–0.05 mm.

Key Advantages

Standardized DIN Mounting:

Drop-in compatibility with international mounting dimensions simplifies direct replacement and engineering integration.

Induction Hardened Raceways:

Deep surface hardness (HRC 58–62) prevents plastic deformation under static overload conditions.

Low Running Torque:

Precision ground raceway profiles reduce internal friction, enabling lower drive motor sizing requirements.

Contamination Protection:

Integrated dual-lip wiper seals on both nut ends exclude dust and retain lubricant film.

Target Applications

CNC Machine Tools:

Drives X, Y, Z linear positioning axes in milling machines, lathes, and routing platforms.

Industrial Automation:

Powers linear gantry modules, pick-and-place robots, and automated assembly lines.

Laser Cutting & Welding Equipment:

Delivers smooth movement across continuous path contouring systems.

Medical Device Drives:

Controls precision elevation, motorized tables, and diagnostic motion frames.

Selection Guide

Calculate Required Load: Determine peak dynamic operating load and static holding force requirements.

Select Diameter and Lead: Match drive speed (RPM) and motor resolution to the required linear pitch.

Determine Precision Grade: Choose C7 for standard transportation axes; select C5 for precision CNC or measurement equipment.

Define End Support Types: Match shaft ends to standard bearing housing series (BK/BF, FK/FF, EK/EF).

Verify Critical Speed: Check maximum operational RPM against the screw shaft length to prevent resonant vibration.

Customization & OEM Services

01/

Custom End Machining: Turning, threading, keyway cutting, and grinding according to customer 2D/3D CAD drawings.

02/

Surface Treatments: Black oxide coating, hard chrome plating, or phosphating for corrosive or cleanroom environments.

03/

Special Lubrication Options: Factory pre-lubrication with high-temperature, low-temperature, or cleanroom-compatible synthetic greases.

04/

Custom Pitch & Lengths: Shaft length cutting up to 6,000 mm with tailored lead pitches upon engineering request.

Manufacturing & Quality Control

Optical Lead Testing:

Laser interferometer calibration verifies cumulative pitch error across the total thread length.

Surface Hardness Verification:

Rockwell hardness testing on every heat-treatment batch ensures uniform depth profiling.

Coordinate Measuring (CMM):

Dimensional inspection of nut mounting holes, flange perpendicularity, and thread profile.

100% Run-out Testing:

Dial indicator radial run-out checks along the full length of every machined screw shaft.

Why Choose Us

Traceable Raw Materials:

Direct sourcing of high-grade alloy bearing steel with full chemical composition heat logs.

In-House Thread Rolling & Grinding:

Precision CNC thread grinders maintain pitch consistency across large volume production.

Dedicated Assembly Quality Assurance:

Every nut and shaft assembly undergoes torque uniformity testing prior to packaging.

Full Manufacturing Transparency:

Direct access to complete technical data, CAD models, and inspection reports for engineering verification.

Summary:

Rigorous manufacturing controls and standardized inspection processes deliver long-term positioning accuracy for industrial applications.

FAQ

Q: What is the main difference between SFU and SFE ball screws?

A: SFU features a single-start thread with a standard lead-to-diameter ratio based on DIN 69051 specifications. SFE features high-lead configurations designed for high-speed linear traverse applications.

Q: What precision grades are available for SFU series ball screws?

A: Standard production covers C7 rolled grade (±0.050 mm/300 mm error limit) and C5 precision rolled or ground grade (±0.018 mm/300 mm error limit).

Q: Can SFU ball screw nuts be supplied with custom preloads?

A: Yes, nuts can be configured with standard axial clearance, zero backlash, or light preload (P1) achieved via ball size selectivity.

Q: What is the maximum shaft length available for SFU ball screws?

A: Raw screw shafts are available in standard lengths up to 6,000 mm, cut and end-machined to your required mounting dimensions.

Q: Do you supply matching end support units for SFU ball screws?

A: Complete assemblies are available including BK/BF, FK/FF, or EK/EF bearing blocks, locknuts, and snap rings ready for immediate mounting.

Need Technical Specifications or Custom End Machining for SFU Ball Screws?

Upload your 2D/3D technical drawings (STEP, DWG, PDF) to receive an immediate engineering assessment and quotation.

Request a Quote / Submit Drawings

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