Product Parameters
The SFY Ball Screw Nut stands for a Single Flanged Y-type Nut.
"S" means Single Nut, "F" means Flanged Type, and "Y" represents the Y-type nut structure.
It features a compact body with a central flange and an end-cap circulation design, enabling high-speed, low-noise, and stable performance. SFY nuts are ideal for CNC machines, automation systems, and precision motion equipment.
Model specifications
|
Model |
Outer diameter of screw rod |
lead |
Spiral lift angle |
Nut middle diameter |
Outer diameter of nut |
Nut steel ball |
Nut wall thickness |
|
SFY1616 |
16 |
16 |
17.007 |
16.66 |
32 |
2.778 |
9.06 |
|
SFY2020 |
20 |
20 |
17.041 |
20,78 |
39 |
3.175 |
10.70 |
|
SFY2525 |
25 |
25 |
17.026 |
26 |
47 |
3.969 |
12.48 |
|
SFY3232 |
32 |
32 |
17.040 |
33.25 |
58 |
4.762 |
14.76 |
|
SFY4040 |
40 |
40 |
16.983 |
41.71 |
73 |
6.35 |
18.82 |
|
SFY2040 |
20 |
40 |
31.549 |
20.748 |
39 |
3.175 |
7.52 |
|
SFY1610S |
15 |
10 |
5.824 |
15.672 |
28 |
2.778 |
7.55 |
Product Features and Applications
SFY Nut Application Areas
High-speed application scenarios
such as high-speed machining centers, rapid feed automatic production lines, etc., can meet the requirements of rapid positioning and high-speed movement.
Precision machining areas
like CNC milling machines, grinders, etc., can ensure machining accuracy and surface quality.
Factory automation
used for robot arm motion control, automatic storage system of goods handling, etc., to improve the degree of automation and production efficiency.
Medical industry
such as high-precision positioning platform in medical equipment, can achieve accurate diagnosis and treatment operation.
Semiconductor industry
It is suitable for wafer handling and chip packaging in semiconductor manufacturing equipment to meet the needs of high-precision and high-speed movement.
SFY Nut Product Features
High speed performance and structural design
① End cover type circulation system
The end cover cycle design is adopted to optimize the return path of the steel ball, reduce noise and vibration, and realize high-speed silent operation (high Dm-N value), especially suitable for high-speed scenes with thousands of revolutions per minute.
The special cycle structure ensures that the smoothness is still maintained under high lead (for example, stable operation is still possible when the lead is 50mm) to avoid jam.
② Patent dust-proof design
Through the double protection of the end cover seal and dust-proof sheet, it can effectively block foreign matter and moisture intrusion, reduce wear and extend service life.
High rigidity and preloading technology
① Zero backlash and preload adjustment
The Gothic groove (Gothic arch) combined with pre-compression technology is used to eliminate the axial gap, realize the backlash-free transmission and improve the repeated positioning accuracy.
The pre-compression level is optional (PO-P4), and the rigidity is enhanced by the negative gap design, and the deformation under load is very small (such as the SFY4040 rigidity of 70~106 kgf/μm).
② Strengthening material and process
The nut is made of 20CrMo (hardness 60-64 HRC), and the ball is made of special steel (hardness> 60 HRC). After vacuum heat treatment, it has excellent wear resistance.
Excellent dustproof and durability
① Dustproof optimization
The patented dust-proof structure improves the sealing and durability, and adapts to the harsh environment such as dust and cutting fluid.
② Long-life design
High-precision grinding and heat treatment process to ensure durability, high dynamic load rating (such as SFY5050 up to 21,786 kN), life of up to tens of thousands of hours.
Efficient transmission and energy saving characteristics
① Efficiency> 90%
Compared with the sliding screw, the rolling friction design reduces the driving torque by 70%, and the transmission efficiency reaches 90 ~ 97%, which is a significant energy saving.
② Micro feed is compatible with high speed
The starting torque is extremely small and supports sub-micron micro-feed; The low heating characteristic allows large lead design (such as SFY4080 lead 80mm) to realize high-speed linear motion.
Application Scenarios
① Large equipment: such as SFY5050 (shaft diameter 50mm, lead 50mm), SFY4080 and other large lead models, designed for large machine tools, engineering machinery design.
② High-precision areas: CNC machine tools, semiconductor equipment, medical machinery and other high-speed and high-precision scenarios.
③ harsh environment: dustproof design is suitable for woodworking machinery, handling equipment and other dusty scenes.
SFY Nut Typical Model Parameter Comparison
The following table summarizes the key parameters of common SFY nuts to help quickly select the type:
|
Model |
lead (mm) |
Applicable load range |
Dustproof design |
Typical application scenarios |
|
SFY5050 |
50 |
Ultra-high load |
Patent dust-proof |
Large machine tools, construction machinery |
|
SFY4040 |
40 |
High load |
Patent dust-proof |
CNC machining center |
|
SFY1616 |
16 |
Medium load |
Optimized dust protection |
Rail car, precision instrument |
|
SFY3232 |
32 |
Medium-high load |
Patent dust-proof |
High-speed automation equipment |
End Face Flange Of Finishing Car
SFY Nut Inspection Program
1.Appearance:
① No bump, no shortage of material
② No flash burr, chamfer rounding
2.Size:
① Flange thickness B ± 0.05
② Small end excircle diameter D ± 0.05
③ Overall length dimension L ± 0.05
④ Diameter of inner hole d ± 0.05
⑤ Inner hole step diameter df(+0.1/0)
⑥ Step depth of inner hole Lf ± 0.05
⑦ Add ball wall thickness H ± 0.05
⑧ Diameter of steel ball B
⑨ Chamfer dimension c
3.Shape and position dimension:
① Verticality between flange end face and datum A ≤ 0.07
② Parallelism ≤ 0.1
③ Cylindricity ≤ 0.02
④ The coaxiality of small end outer circle and inner hole and inner hole step datum A is ≤ 0.07
⑤ Roughness of the rest Ra3.2
⑥ Roughness of end face ≤ 1.6
Cylindrical Grinding
1.Work content:
① Positioning with mandrel/positioning with end face, rough and fine grinding of outer circle
② External circle size of grinding; grinding step end face to size
2.Inspection items:
① Appearance: no bump
② Size: B ± 0.1 after flange finish grinding
Diameter dimension D(g6) of small end excircle after finishing
③ Shape and position dimension: perpendicularity between flange end face and datum A ≤ 0.01
Coaxiality between small end excircle and datum A ≤ 0.01
External circle roughness Ra0.3 (target 0.2)
Flange end roughness Ra0.4
Cylindricity ≤ 0.005
Raceway Grinding
1.Work Content
① Clamp the excircle with a special fixture, and support the end face of the step for positioning (air gun and cotton cloth to ensure that there is no foreign matter such as iron filings)
② Thread grinding raceway depth
2.Inspection Items
① Appearance: no bump
② Size: add steel ball wall thickness size H ± 0.006, measured with vernier caliper
Ball diameter dimension D, measured with vernier caliper
Raceway arc direct R, measured with profilometer
Contact angle of raceway steel ball, measured by profilometer
③ Shape and position dimension: the coaxiality between the raceway and datum A is ≤ 0.03
Verticality between raceway and flange ≤ 0.03
Horizontal sample deviation between return hole and raceway ≤ 0.03
Raceway finish Ra0.3 (target 0.2)
Cylindricity of raceway ≤ 0.004
Assembly
Inspection Items
1.Appearance: no bump, no defect, no burr, screw raceway without cracking
2.Performance:
① Assembly effect: smooth and soft operation, without jamming and reverse jamming
② Assembly clearance:
|
P0 |
No gap |
No preloading |
|
P1 |
No gap |
light preloading |
|
P2 |
No gap |
Medium prepressure |
|
P3 |
No gap |
heavy preloading |
Customers have requirements, according to customer requirements assembly. No requirement, default P0 (feel)
3. Nut concentricity beating ≤ 0.05, measured with dial indicator
Product Details
Compared with other nuts, the circulation mode of SFY nut is the end cover circulation type, which is similar to the circulation mode of SFS nut, and has strong scraping ability and high rigidity when moving at high speed. The SFU nut is an internal circulation type 05, and the steel ball moves along the groove of the internal circulator, which is suitable for smaller diameter screw rods.
Related End-Cap Circulation Ball Screw Nuts
End-Caps Circulation
1.End cap return design, high speed, low noise, high Dm-N value.
2.Unique return design keep the smoothness even with high lead.
3.Enhanced dust-proof design.
4.Variety of selection in diameter and leads.
5. No backlash, high rigidity.
For high speed application, CNC milling, precision application, factory automation and medical industry.
Product Supporting Evidence
Maintenance
The ball screw of our company will complete anti-rust treatment before production, so please clean the anti-rust oil before use and add lubricating oil immediately.If the product rusts due to failure to add lubricating oil, we will not be able to do free warranty.
If the user fails to purchase the product within 1 month, please do anti-rust treatment regularly. With the difference of regional temperature, the anti-rust treatment time also needs to be adjusted.
Please check the condition regularly for one month. If the surface of the screw is polluted by dust and metal dust, please clean it with kerosene before adding lubricant.
The ball screw must keep lubricant at all times. If the product is rusted or damaged without lubricant, we will not be able to list it as a free warranty item.
Intimate service, worry-free after-sales
Usage
As the ball screw nut assembly has strict technical requirements, do not disassemble the nut, so as not to damage the entire set of ball screw, resulting in the prohibition of disassembly of the entire equipment failure.
If the ball screw is installed vertically, please pay special attention to the slip of the nut. If the nut slips accidentally, please immediately find a company authorized by our company to assist in the slip.
Be sure to use the product in a clean environment, and install a protective cover outside the product to prevent dust and metal dust from entering, which will affect the accuracy and service life of the product.
Do not use in an environment higher than 80 degrees Celsius (except for heat-resistant specifications), so as not to damage the seals of the product and shorten the service life.
FAQ
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