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SFY High Lead Flanged Ballscrew
The SFY series uses a large lead in relation to screw diameter. It is intended for axes that need more linear travel from each motor revolution, with single-flange nut sizes ranging from SFY1616 to SFY050100.
Description
Product Details
The product photographs show an SFY flanged nut installed on a rolled screw shaft. The nut has a compact cylindrical body, a rectangular mounting flange and circulation components positioned around both ends. No stepper motor is included in the photographed assembly.
SFY model numbers combine the nominal screw diameter and lead. An SFY1616 moves the nut 16 mm for one screw revolution. At the upper end of the published range, SFY050100 provides a 100 mm nominal lead on a 50 mm screw.
A larger lead reduces the screw speed needed to reach a given linear velocity. It also changes the drive calculation: the motor must produce more torque to generate the same axial force, while each motor step represents a greater linear distance.
Product Description
The motor cannot be selected from screw diameter alone. For a stepper-driven axis, the calculation must begin with moving load, acceleration, required feed speed and acceptable distance per step.
Microstepping can make motion smoother, but the microstep setting should not be treated as guaranteed mechanical positioning accuracy. Screw lead accuracy, motor torque margin, coupling stiffness and support-bearing movement still affect the final result.
Long shafts require a separate speed check. A high-lead SFY screw may reach the target feed at lower rotational speed, but unsupported length, end-support arrangement and operating orientation still determine whether the shaft can run without excessive vibration.
Product Information
| Item | Specification |
|---|---|
| Series | SFY |
| Nut Form | Single flanged nut |
| Screw Production | Cold rolled |
| Standard Lead Group | SFY1616, SFY2020, SFY2525, SFY3232, SFY4040, SFY5050 |
| Extra High Lead Group | SFY01632, SFY02040, SFY02550, SFY03264, SFY04080, SFY050100 |
| Motion per Revolution | Equal to the selected model lead |
| Motor Supply | Not included unless quoted |
| End Processing | Produced from the approved shaft drawing |
| Drive Calculation | Load, speed, acceleration, lead and duty cycle |
FAQ
Why is an SFY screw described as high lead?
Its published models use leads equal to or greater than the nominal screw diameter, producing longer travel per revolution than common small-lead feed screws.
Does this page include a stepper motor?
No. It shows the SFY screw and flanged nut. The motor, coupling and support units must be selected or quoted separately.
Does a larger lead always make an axis faster?
It increases travel per revolution, but actual speed remains limited by available motor torque, shaft length, support arrangement and operating load.
Can microstepping provide the same accuracy as a smaller-lead screw?
Not automatically. Microstepping mainly improves command resolution and smoothness; it does not remove mechanical error or guarantee that every commanded microstep produces equal movement.
What information is needed for motor matching?
Provide the exact SFY model, moving mass, required speed, acceleration, mounting direction, operating cycle and desired positioning resolution.
Can the shaft length and end journals be customized?
We build to customer drawings under OEM/ODM, and accept orders as small as a single piece for standard sizes.
About Us
Lishui Guangyuan Industry & Trade Co Ltd supplies rolled ball screws and matching drive components. Motor matching and end machining can be prepared from the required axis speed, load data and installation drawing.
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