Introduction
The bearing ball screw DFI is a precision transmission component with an internal circulation double nut design. It features a steel ball internal circulation system and high-quality alloy steel, manufactured through precision grinding and professional heat treatment processes. It offers low friction, high rigidity, and nearly zero backlash, with high transmission efficiency and precise positioning. Its compact structure saves installation space, and it has a load capacity superior to similar single-nut products, suitable for scenarios where the screw diameter cannot be increased. It comes in a wide range of specifications and supports customization, combining high cost-effectiveness with stable quality.
Product Specifications
The DFI series is an internal circulation product, with core parameters designed around precision transmission requirements, including the matching dimensions of the screw shaft and nut, along with compatible ball specifications. It adopts a double-nut structure, equipped with corresponding mounting flanges and relevant mounting hole specifications. It provides rated dynamic and static loads suitable for industrial applications, while also covering key parameters such as accuracy levels to ensure transmission precision, effective turns to maintain operational performance, and axial stiffness to support stable transmission.
|
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 |
|||||||
|
OFI01605-6 |
16 |
5 |
3.175 |
30 |
49 |
10 |
75 |
39 |
34 |
4.5 |
8 |
4.5 |
M6 |
1×6 |
1380 |
3052 |
44 |
|
OFI02005-6 |
20 |
5 |
3.175 |
34 |
57 |
11 |
85 |
45 |
40 |
5.5 |
9.5 |
5.5 |
M6 |
1×6 |
1551 |
3875 |
52 |
|
OFI02505-6 |
25 |
5 |
3.175 |
40 |
63 |
11 |
86 |
51 |
46 |
5.5 |
9.5 |
5.5 |
M8 |
1×6 |
1724 |
4904 |
62 |
|
OFI02510-6 |
10 |
4.762 |
46 |
72 |
12 |
130 |
58 |
52 |
6.5 |
11 |
6.5 |
M6 |
1×6 |
2954 |
7295 |
68 |
|
|
OFI03205-6 |
32 |
5 |
3.175 |
46 |
72 |
12 |
87 |
58 |
52 |
6.5 |
11 |
6.5 |
M8 |
1×6 |
1922 |
6343 |
72 |
|
OFI03210-6 |
10 |
6.35 |
54 |
88 |
15 |
145 |
70 |
62 |
9 |
14 |
8.5 |
M8 |
1×6 |
4805 |
12208 |
83 |
|
|
OFI04005-6 |
40 |
5 |
3.175 |
56 |
90 |
15 |
90 |
72 |
64 |
9 |
14 |
8.5 |
M8 |
1×6 |
2110 |
7988 |
84 |
|
OFI04010-6 |
10 |
6.35 |
62 |
104 |
18 |
148 |
82 |
70 |
11 |
17.5 |
11 |
M8 |
1×6 |
5399 |
15500 |
99 |
|
|
OFI05010-6 |
50 |
10 |
6.35 |
72 |
114 |
18 |
148 |
92 |
82 |
11 |
17.5 |
11 |
M8 |
1×6 |
6004 |
19614 |
115 |
|
OFI06310-6 |
63 |
10 |
6.35 |
85 |
131 |
22 |
153 |
107 |
95 |
14 |
20 |
13 |
M8 |
1×6 |
6719 |
25358 |
135 |
|
OFI08010-6 |
80 |
10 |
6.35 |
105 |
150 |
22 |
153 |
127 |
115 |
14 |
20 |
13 |
M8 |
1×6 |
7346 |
31953 |
156 |
|
DFI01604-6 |
16 |
4 |
2.381 |
30 |
49 |
10 |
80 |
39 |
34 |
4.5 |
8 |
4.5 |
M6 |
1×6 |
973 |
2406 |
44 |
|
DFI02004-6 |
20 |
4 |
2.381 |
34 |
57 |
11 |
80 |
45 |
40 |
5.5 |
9.5 |
5.5 |
M6 |
1×6 |
1066 |
2987 |
51 |
|
DFI02504-6 |
25 |
4 |
2.381 |
40 |
63 |
11 |
80 |
51 |
46 |
5.5 |
9.5 |
5.5 |
M6 |
1×6 |
1180 |
3795 |
60 |
|
DFI0255T-6 |
5.08 |
3.175 |
40 |
63 |
11 |
101 |
51 |
46 |
5.5 |
9.5 |
5.5 |
M8 |
1×6 |
1724 |
4903 |
62 |
|
|
DFI03204-6 |
32 |
4 |
2.381 |
46 |
72 |
12 |
80 |
58 |
52 |
6.5 |
11 |
6.5 |
M6 |
1×6 |
1296 |
4838 |
69 |
|
DFI0325T-6 |
5.08 |
3.175 |
46 |
72 |
12 |
102 |
58 |
52 |
6.5 |
11 |
6.5 |
M8 |
1×6 |
1922 |
6343 |
72 |
|
Bearing Ball Screw DFI Core Advantages:
1.
The DFI dual-nut preloaded design is highly reliable. Combined with the Gothic-style groove structure, it can completely eliminate axial play. Whether for fine feed or reverse motion, positioning is precise and stable, and rigidity is maximized.
2.
Internal circulation structure + compact size. The nut is small and space-saving, making it especially suitable for installations with limited space. It can be easily assembled without modifying the equipment layout.
3.
High-quality materials and construction. Made of premium alloy steel with professional heat treatment, precision-ground raceways, low wear, and strong durability. Its lifespan is much longer than ordinary screws, reducing the hassle of frequent replacements.
4.
Efficient and low-effort drive. Rolling friction resistance is only one-third of that of a sliding screw, ensuring smooth transmission without jamming. It also reduces energy consumption and heat generation, making long-term use more cost-effective.
5.
Strong interchangeability and flexibility. It can directly replace most precision-ground ball screws on the market without changing the mounting seat. Complete specifications are available, and customization is supported.
Application Scope:
Widely used in precision machine tools, automation equipment, semiconductor manufacturing, medical instruments, and general industrial machinery, in scenarios with strict requirements for transmission accuracy and load capacity.
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. Question: Why is it not recommended to machine the ends of a DFI ball screw by yourself?
Answer: DIY machining can easily compromise the original precision of the screw. End machining errors may lead to mismatches between the screw and the bearings or couplings, resulting in transmission stuttering or accelerated wear. Additionally, the manufacturer's end machining is designed to match the overall stress distribution of the screw, while DIY machining may disrupt the internal stress balance, leading to bending or deformation during use and significantly shortening its service life.
2. Question: What is the core difference between the DFI series and external circulation ball screws?
Answer: The core differences lie in structure and application scenarios. The DFI internal circulation has a compact structure and lower noise, making it suitable for precision transmission in small spaces. External circulation ball screws generally have higher load capacity and better heat dissipation, making them suitable for high-lead, high-load, high-speed scenarios, but they are larger in size and require more installation space.
3. Question: In a DFI ball screw model like DFI02510 - 4, what does each part represent?
Answer: The model code follows common industry parameter notation rules. DFI is the series code; 025 indicates a nominal diameter of 25mm; 10 denotes a 10mm lead; and the final 4 represents 4 ball circuits. From the model, you can quickly determine the basic parameters of the product.
4. Question: Which parameters should be the focus when selecting a model, and what are the applicable scenarios?
Answer: Key selection parameters include nominal diameter, lead, number of ball circuits, rated dynamic/static load, and rigidity. For heavy-duty scenarios, larger diameter models like DFI4005 - 4 can be prioritized, with a dynamic rated load of 1610 kgf; for high-speed applications, models with moderate leads can balance efficiency and stability. Applicable scenarios include CNC machines, industrial automation equipment, and precision instruments, especially where installation space is limited and high transmission accuracy is required.
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