Precision Ball Screw Spindles for CNC Linear Motion | Backlash-Free Nut & Machined Ends
High-precision SFU ball screws for CNC linear drives. Backlash-free ball nut, medium preload, smooth motion, and fully machined shaft ends for BK/FK/BF/FF bearing supports. View complete SFU series dimensions & load ratings.
High Precision & Smooth Linear Motion
SFU ball screws deliver exceptionally smooth and accurate linear movement thanks to precision-ground screw shafts and preloaded ball nuts. This design minimizes friction and ensures excellent positioning accuracy, making them ideal for CNC machines, automation equipment, and high-precision industrial applications.
Backlash-Free Preloaded Nut Design
Each SFU ball screw comes with a medium-preload ball nut that effectively eliminates backlash. This ensures stable motion control, higher machining accuracy, and improved repeatability, especially in applications requiring tight tolerance and zero lost motion.
Long Service Life & Optimized Durability
Manufactured from hardened alloy steel and engineered with optimized ball circulation, SFU ball screws achieve superior wear resistance and long operational life. The integrated oil hole design allows convenient lubrication, reducing maintenance effort while ensuring long-term reliable performance.
Ball Screw
Ball screws for linear drives,e.g. for CNC machines. The nut is backlash-free due to a medium preload. Ends are premachined to fit fixed bearing(BK and FK series) and floating bearing(BF and FF series).
CNC Machinery & Precision Automation
SFU ball screws are widely used in CNC routers, milling machines, lathes, and engraving equipment. Their high accuracy and zero-backlash design ensure stable feed motion, precise positioning, and superior cutting quality.
Industrial Robots & Linear Actuators
With smooth linear transmission and high load-bearing capability, SFU ball screws are ideal for robotic arms, industrial manipulators, and automated production lines. They provide efficient motion control for tasks requiring repeatability and durability.
Medical, Semiconductor & Inspection Equipment
The low-friction and high-precision characteristics of SFU ball screws make them suitable for medical imaging devices, semiconductor manufacturing tools, and precision measuring instruments. They enable consistent micro-positioning for high-end industrial applications.
Why Choose Our Ball Screw?
Engineered for high precision, zero-backlash performance,
and long-term reliability in demanding CNC and automation systems.
Superior Accuracy & Backlash-Free Operation
Our ball screws feature precision-ground shafts and preloaded ball nuts that eliminate backlash and ensure smooth, accurate linear motion. This guarantees consistent performance in CNC machining, robotic systems, and high-precision positioning applications.
Robust Construction for Long Service Life
Made from hardened alloy steel and designed with optimized ball circulation, our ball screws offer exceptional wear resistance and durability. They maintain stable performance under high load, high speed, and continuous operation environments.
Easy Installation with Machined Shaft Ends
Each screw comes with premachined ends compatible with BK, BF, FK, and FF bearing supports, making installation fast and reliable. This ensures better alignment, reduced assembly time, and improved long-term system stability.
Technical Specifications
Complete specifications and dimensional data to help you
select the right ball screw for your CNC and automation needs.
| Model No. | d (mm) | l (mm) | Da (mm) | D (mm) | A (mm) | B (mm) | L (mm) | W (mm) | H (mm) | X (mm) | Q | n | Ca (kgf) | Coa (kgf) | K (kgf/μm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SFU01204-4 | 12 | 4 | 2.5 | 24 | 40 | 10 | 40 | 32 | 30 | 4.5 | 1x4 | 902 | 1884 | 26 | |
| SFU01604-4 | 16 | 4 | 2.381 | 28 | 48 | 10 | 40 | 38 | 40 | 5.5 | M6 | 1x4 | 973 | 2406 | 32 |
| SFU02004-4 | 20 | 4 | 2.381 | 36 | 58 | 10 | 42 | 47 | 44 | 6.6 | M6 | 1x4 | 1066 | 2987 | 38 |
| SFU02504-4 | 25 | 4 | 2.381 | 40 | 62 | 10 | 42 | 51 | 48 | 6.6 | M6 | 1x4 | 1180 | 3795 | 43 |
| SFU02506-4 | 25 | 6 | 3.969 | 40 | 62 | 10 | 54 | 51 | 48 | 6.6 | M6 | 1x4 | 2318 | 6057 | 47 |
| SFU02508-4 | 25 | 8 | 4.762 | 40 | 62 | 10 | 63 | 51 | 48 | 6.6 | M6 | 1x4 | 2963 | 7373 | 49 |
| SFU03204-4 | 32 | 4 | 2.381 | 50 | 80 | 12 | 44 | 65 | 62 | 9 | M6 | 1x4 | 1296 | 4838 | 51 |
| SFU03206-4 | 32 | 6 | 3.969 | 50 | 80 | 12 | 57 | 65 | 62 | 9 | M6 | 1x4 | 2632 | 7979 | 57 |
| SFU03208-4 | 32 | 8 | 4.762 | 50 | 80 | 12 | 65 | 65 | 62 | 9 | M6 | 1x4 | 3387 | 9622 | 60 |
| SFU04006-4 | 40 | 6 | 3.969 | 63 | 93 | 14 | 60 | 78 | 70 | 9 | M6 | 1x4 | 2873 | 9913 | 66 |
| SFU04008-4 | 40 | 8 | 4.762 | 63 | 93 | 14 | 67 | 78 | 70 | 9 | M6 | 1x4 | 3712 | 11947 | 70 |
| SFU05020-4 | 50 | 20 | 7.144 | 75 | 110 | 16 | 138 | 93 | 85 | 11 | M8 | 1x4 | 7142 | 22588 | 94 |
| SFU06320-4 | 63 | 20 | 9.525 | 95 | 135 | 20 | 149 | 115 | 100 | 13.5 | M8 | 1x4 | 11444 | 36653 | 112 |
| SFU08020-4 | 80 | 20 | 9.525 | 125 | 165 | 25 | 154 | 145 | 130 | 13.5 | M8 | 1x4 | 12911 | 47747 | 138 |
| SFU10020-4 | 100 | 20 | 9.525 | 150 | 202 | 30 | 180 | 170 | 155 | 17.5 | M8 | 1x4 | 14303 | 60698 | 162 |
Who We Are?
About Ever Source
Shanghai Ever Source International Trade Co., Ltd. was established in 2003, mainly engaged in corporation with European and American countries. We understand the strict requirements of European and American customers on product quality and delivery speed better than most factories in China. Because we fully understand the advantages and drawbacks of different domestic factories, we can supply the most cost-effective products for foreign customers to meet the needs of different customers. Help customers save time and improve efficiency. And always recommend the latest products in the Chinese market to our customers. Through our screening and quality inspection by professional engineers, we can ensure that any product or service you purchase from our company is worth the money.
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Our product certification, LeadShine’s authorization certification, and corporate qualifications
FAQ
Frequent Asked Question
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*Our worktime is during 9:00 AM to 6:00 PM (UTC+8) on workdays. You can also contact us without hesitation after worktime. We will reply you as soon as possible.
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*Our product will be the same quality as the specification induction. We will also test the product before delivering. If you want, we can also send you the testing video.
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*We will choose the logistics method according to your requirements. But at the same time, we also cooperate with Fedex, and we can offer very low Fedex prices, but you need to confirm the details with us before placing an order.
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*1: You can fill in your requirement in inquiry system. We will send you the quotation after receiving your inquiry. 2: You can consult our website’s customer service for products, and we will patiently answer your questions.
FAQ
Frequent Asked Question
Thank you for your interest in our products! If you have more questions, please contact us. We look forward to assisting you!
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