Introduction
High precision ball screw SFNU is a precision transmission component with an internal circulation design, featuring high-speed silent operation, low friction, high rigidity, and near-zero backlash. It is equipped with all-around dust protection and a through-type lubrication system, providing outstanding durability.
Product Parameters
The SFNU series is a heavy-duty internal circulation transmission component that emphasizes high rigidity, high precision, and strong dust resistance. As an upgraded version, it optimizes the dust protection structure and circulation design based on the SFU series, making it a core transmission choice in the fields of industrial automation and precision machinery.
|
d：Shaft diameter |
I：Lead |
Da：Bead diameter |
k:Rigidity |
n:Number of steel ball turns |
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|
ca:Basic dynamic load rating(kgf) |
coa：Basic static rated load(kgf) |
unit：mm |
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|
Model |
d |
l |
Da |
Nut size |
Ca |
C0a |
k |
||||||||
|
D |
A |
B |
L |
W |
H |
X |
Y |
Z |
Q |
n |
|||||
|
SFNU1204-3 |
12 |
4 |
2.381 |
22 |
40 |
8 |
35 |
32 |
30 |
4.5 |
1×3 |
677 |
1413 |
32 |
|
|
SFNU1204-4 |
4 |
2.381 |
24 |
40 |
10 |
40 |
32 |
30 |
4.5 |
1×4 |
902 |
1884 |
32 |
||
|
SFNU01605-4 |
16 |
5 |
3.175 |
28 |
48 |
10 |
45 |
38 |
40 |
5.5 |
M6 |
1×4 |
1380 |
3052 |
32 |
|
SFNU01610-3 |
10 |
3.175 |
28 |
48 |
10 |
57 |
38 |
40 |
5.5 |
M6 |
1×3 |
1103 |
2401 |
26 |
|
|
SFNU02005-4 |
20 |
5 |
3.175 |
36 |
58 |
10 |
51 |
47 |
44 |
6.6 |
M6 |
1×4 |
1551 |
3875 |
39 |
|
SFNU02505-4 |
25 |
5 |
3.175 |
40 |
62 |
10 |
51 |
51 |
48 |
6.6 |
M6 |
1×4 |
1724 |
4904 |
45 |
|
SFNU02510-4 |
10 |
4.762 |
40 |
62 |
12 |
80 |
51 |
48 |
6.6 |
M6 |
1×4 |
2954 |
7295 |
50 |
|
|
SFNU03205-4 |
32 |
5 |
3.175 |
50 |
80 |
12 |
52 |
65 |
62 |
9 |
M6 |
1×4 |
1922 |
6343 |
54 |
|
SFNU03210-4 |
10 |
6.35 |
50 |
80 |
12 |
85 |
65 |
62 |
9 |
M6 |
1×4 |
4805 |
12208 |
61 |
|
|
SFNU04005-4 |
40 |
5 |
3.175 |
63 |
93 |
14 |
55 |
78 |
70 |
9 |
M8 |
1×4 |
2110 |
7988 |
63 |
|
SFNU04010-4 |
10 |
6.35 |
63 |
93 |
14 |
88 |
78 |
70 |
9 |
M8 |
1×4 |
5399 |
15500 |
73 |
|
|
SFNU05010-4 |
50 |
10 |
6.35 |
75 |
110 |
16 |
88 |
93 |
85 |
11 |
M8 |
1×4 |
6004 |
19614 |
85 |
|
SFNU06310-4 |
63 |
10 |
6.35 |
90 |
125 |
18 |
93 |
108 |
95 |
11 |
M8 |
1×4 |
6719 |
25358 |
99 |
|
SFNU08010-4 |
80 |
10 |
6.35 |
105 |
145 |
20 |
93 |
125 |
110 |
13.5 |
M8 |
1×4 |
7346 |
31953 |
109 |
Core Advantages of High Precision Ball Screw SFNU:
1. Ultra-precise Positioning and Zero Backlash Stability:
Features excellent positioning accuracy and repeatable positioning performance. Near-zero backlash is achieved through optimized preload design and specialized groove structures, eliminating cumulative errors and ensuring precise motion control.
2. High Efficiency, High Speed, and Quiet Operation:
The internal circulation system significantly reduces friction, offering excellent transmission efficiency and energy savings. Reinforced circulation structure ensures smooth and low-noise operation even at high speeds, meeting the demands of high-performance equipment.
3. High Rigidity and Heavy Load Capacity, Durable:
Made from high-quality bearing steel and processed with advanced heat treatment techniques, providing outstanding rigidity and load-bearing capability. Equipped with upgraded dust-proof design and efficient lubrication system, it maintains long service life even under harsh conditions.
4. Compact and Flexible Customization:
Compact design with internal circulation and flange-type nut allows easy installation in tight spaces. Supports multi-dimensional customization to precisely match different load, travel, and installation requirements.
Applications:
Widely applicable to CNC machining centers, high-speed machine tools, precision machine tools, automated conveyor systems, industrial robots, as well as semiconductor equipment, medical devices, printing machines, textile machinery, and other industrial machinery.
Service Model
Standard Product Supply:
Offers in-stock products with delivery within 3-7 days;
Custom Solutions:
From requirement communication → solution design → sample testing → mass production, the entire process is supported by a dedicated technical contact;
After-Sales Support:
Provides product installation guidance, a 1-year warranty (excluding human-caused damage), and fast response to malfunctions.
Our Factory
Xuxin Automation: Your Premier One-Stop Manufacturer for High-Precision Motion Components
we specialize in the R&D and manufacturing of custom non-standard lead screws and nuts. With our 13,000 m² state-of-the-art facility, we deliver highly reliable industrial automation solutions tailored to your exacting requirements.
Production Area
Advanced Equipment
Experienced Team
Annual Output
Why Choose Us?
Exceptional Non-Standard Customization Capabilities
In-house R&D: Our professional engineering team possesses decades of deep-seated expertise in the lead screw and nut industry.
On-Demand Development: Whether you require specialized leads, unique materials, or complex structures, we provide bespoke manufacturing based on your technical drawings (PDF, CAD, or 3D models).
Rigorous Quality Control & Manufacturing
High-Precision Machining: Leveraging our fleet of 80 CNC machines and precision grinding centers, we ensure every component achieves micron-level accuracy.
Full Supply Chain Integration: From raw material processing and heat treatment to precision grinding and final inspection, the entire process is completed in-house. This end-to-end control guarantees stable lead times and uncompromising quality.
FAQ
1. Q: Can the product be customized according to our needs, such as printing our logo on it?
A: Of course, our products can be customized according to your requirements, and your logo can also be printed on them.
2. Q: What types of ball circulation methods are there? What are their characteristics?
A: They are mainly divided into internal circulation and external circulation, which are key factors affecting the structure and performance of the ball screw:
Internal circulation: The balls circulate through a recirculator inside the nut, moving entirely within the nut's raceway and not exposed outside. The advantages are compact structure, smaller radial size, and low operating noise; the disadvantage is that it requires high machining accuracy, and its load capacity is slightly lower than that of external circulation.
External circulation: The balls are returned to the starting end via a ball return tube connecting the ends of the raceway outside the nut. The advantage is simpler processing and higher load capacity, suitable for heavy-load scenarios; the disadvantage is a slightly larger radial size and slightly higher noise than internal circulation when running at high speeds.
3. Q: Do ball screws have a self-locking function? Why?
A: No, they do not have a self-locking function. This is because the resistance from rolling friction is very small. When the ball screw is installed vertically, the nut (or screw) can move in the reverse direction simply due to the weight of the load. Therefore, when using ball screws for vertical lifting equipment, a brake motor or external brake must be used to prevent the load from falling when power is cut off.
4. Q: What equipment are ball screws mainly used in?
A: They are applied in various fields requiring precise linear motion:
Industrial automation: robot joints, linear stages, servo actuators;
CNC machines: feed axes and spindle positioning of lathes and milling machines;
Precision instruments: laser cutters, 3D printers, coordinate measuring machines;
Other fields: medical equipment (CT scanner beds), aerospace equipment, elevator lift systems.
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