SFS3210 3.969mm Quiet Heavy Duty Ball Screw


The SFS3210 3.969mm Quiet Heavy Duty Ball Screw is a robust and efficient component, renowned for its high precision and low friction loss. It ensures excellent transmission efficiency, making it ideal for applications requiring accurate micro feeds. This high-speed component is customizable and demonstrates superb axial rigidity.

SFS3210 3.969mm Quiet Heavy Duty Ball Screw

The SFS3210 is a robust and quiet heavy-duty ball screw from ZLV. Its shaft diameter is 32mm and it has a lead of 10mm, with a steel ball diameter of 3.969mm. Known for its high efficiency and precision, this product is designed with customizable specifications, adapting to various application requirements.


Here are the details of the SFS3210:

Model specifications SFS3210
Shaft diameter (mm) 32
Lead (mm) 10
Steel ball diameter (mm) 3.969
Nut Size (D, A, B, L, W, H, X, Q,n) 50, 80, 12, 42, 62, 65, 62, M6,3.8*1
Load (Ca) 4805
Screw rod weight (kg/M) 6
Nut weight (pcs/kg) 0.5
Screw rod unit price (USD/M) 11
Nut unit price (USD/pcs) 21

Please note that these dimensions can be customized according to specific needs.

SFS3210 3.969mm Quiet Heavy Duty Ball Screw drawing

Ball Screw Characteristics

  1. Low friction loss and high transmission efficiency: The rolling movement between the screw shaft and the nut results in high movement efficiency. This translates to power usage of only 1/3rd compared to sliding screw pairs, making it energy efficient.
  2. High precision: Manufactured with world-class machinery, the SFS3210 ball screw ensures maximum accuracy. Strict control over temperature and humidity during grinding, assembly, and inspection processes further enhances precision.
  3. Capability for high-speed feeding and micro feeding: Thanks to its use of ball motion, the SFS3210 starts with a minimal torque, preventing crawl phenomena and enabling precise micro feeds.
  4. High axial rigidity: Preload can be applied to the ball screw to achieve negative axial clearance, thus obtaining high rigidity.
  5. Non-self-locking with reversible transmission: This feature allows for a two-way movement of the ball screw, offering versatile functionality.

Components and Classification

The ball screw consists of a screw, nut, steel ball, preload disk, reverser, and dustproof device. It can be classified into several types:

  1. Self-lubricating ball screw: With a removable oil device, it doesn’t require lubrication pipelines and equipment, reducing oil change and waste oil disposal costs.
  2. Quiet ball screw: This type of ball screw has a special groove-type ball spacer ring between the balls to suppress noise generated by the collision between the balls, making it quiet and smooth during operation.
  3. High-speed ball screw: This is designed for high acceleration, high rigidity, high-speed feeding, low vibration, and low noise. It’s commonly used in quick feeds of tool machines, high-speed cutting centers, etc.
  4. Heavy load ball screw: Capable of withstanding a large axial load, this type is suitable for all-electric design machines, air compressors, semiconductor manufacturing devices, and forging manufacturing devices, among others. The distinction between rolling and grinding grade screws also applies here, with the former being suitable for less precision-demanding scenarios and the latter for more precision-demanding scenarios.


  1. Nominal diameter: Refers to the outer diameter of the screw. Common specifications include 12, 14, 16, 20, 25, 32, 40, 50, 63, 80, 100, 120mm.
  2. Lead: The distance the nut moves linearly when the screw rotates one round. It impacts the nut’s movement speed and the ball screw’s linear thrust. With a larger lead, the linear movement speed increases under the same rotation speed. The relationship can be calculated using the formula:v = r * i (where v is the movement speed of the nut in mm/s, r is the rotation speed of the screw in r/s, and i is the lead in mm)The relationship between the lead and the screw thrust can be calculated as:F = (2 * π * T * n) / i (where F is the screw thrust in N, T is the torque provided by the motor in N·m, n is the transmission efficiency (85%-95% for ball screws), and i is the lead in m)
  3. Length: This includes the total length and thread length. Some manufacturers calculate total length, while others need thread length. Thread length includes total thread length and effective travel length – the former is the total length of the thread part, and the latter is the theoretical maximum length of the nut’s linear movement.
  4. Nut form: Various nut forms will be shown on the product sample of each manufacturer. There are several types of flanges, including round flange, single-cut edge flange, double-cut edge flange, and no flange. Single and double nuts are available, and the main difference between them is that the latter can adjust the preload and the former can’t.
  5. Accuracy: For the ball screw, there are accuracy grades of P1, P2, P3, P4, P5, P7, P10 in domestic standards, while in Japan, South Korea, and Taiwan, there are C0, C1, C2, C3, C5, C7, C10 under JIS grade. In Europe, the standards are IT0, IT1, IT2, IT3, IT4, IT5, IT7, IT10.


The SFS3210 from ZLV offers top-notch precision and efficiency, allowing for a wide range of applications in different industries. By combining customizable features, high accuracy, and excellent performance, this product becomes a perfect choice for any heavy-duty mechanical application.

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