SFY2550 3.969mm Milled Mute Self Lubricating Heavy Duty Ball Screw


The SFY2550 3.969mm Milled Mute Self Lubricating Heavy Duty Ball Screw stands out for its high precision, excellent efficiency, and low friction loss. Designed for heavy-duty applications, it ensures smooth, noise-reduced operations, high-speed feeds, and excellent axial stiffness. Notably, the product can be customized to meet individual requirements.

SFY2550 3.969mm Milled Mute Self Lubricating Heavy Duty Ball Screw

This product spotlight focuses on the SFY2550 3.969mm Milled Mute Self Lubricating Heavy Duty Ball Screw, a premium product brought to you by the ZLV brand. This meticulously engineered ball screw system combines high durability, precision, and efficiency, all tailored to meet customer’s unique needs.

Specifications and Dimensions

Here, we present a tabulated detail of the product’s technical specification:

Parameter Value (Metric Units)
Model Specifications SFY2550
Shaft Diameter 25 mm
Lead 25 mm
Steel Ball Diameter 3.969 mm
Nut Size 47 mm (D), 74 mm (A), 12 mm (B),58 mm (L), 60 mm (W), 49 mm (H),6.6(X),M6(Q),0.8*2
Load 2074
Weight Screw Rod: 1.58 Kg/M, Nut: 0.3 Kg/pcs
Unit Price (USD) Screw Rod: $12/M, Nut: $12/pcs

SFY2550 3.969mm Milled Mute Self Lubricating Heavy Duty Ball Screw drawing

Features and Characteristics

The SFY2550 ball screw from ZLV delivers impressive features, including:

  1. Low friction loss and high transmission efficiency: The numerous steel balls within the ball screw assembly provide rolling motion, reducing driving torque to less than one-third of past sliding screws. This feature makes it an energy-efficient choice.
  2. High precision: The product is manufactured under rigorous controls over temperature and humidity conditions, and comprehensive quality management ensures precise performance.
  3. Capable of high-speed feed and micro feed: Owing to the rolling motion, the system requires minimal starting torque, eliminating the crawling phenomenon of sliding movement, thereby allowing precise micro feeding.
  4. High axial rigidity: The ball screw can be preloaded to achieve negative axial clearance, resulting in high rigidity. The pressure applied to the steel balls inside the ball screw enhances the rigidity of the nut part in mechanical devices.
  5. Non-self-locking with reversible transmission: Ball screws do not possess self-locking characteristics, hence, the transmission is reversible.

Composition and Classification

The SFY2550 ball screw consists of a screw, nut, steel ball, pre-pressure piece, reverser, and dust protector.

Classifications of ball screws are:

  1. Self-lubricating ball screw: Comes with a removable oil device, eliminating the need for a lubrication pipeline system and equipment. This reduces oil change and waste oil handling costs.
  2. Mute ball screw: Features a specially grooved ball spacer to suppress noise from collisions between balls. It ensures quiet, smooth operation.
  3. High-speed ball screw: Characterized by high acceleration, high rigidity, high-speed feed, low vibration, and low noise. It’s used in fast feed of machine tools, high-speed cutting centers, and high-speed vertical load cutting centers.
  4. Heavy load type ball screw: Can withstand a large axial load, suitable for all-electric design machines, air compressors, semiconductor manufacturing devices, and forging manufacturing devices.


The parameters of a ball screw like the SFY2550 include nominal diameter, lead, and length.

  1. Nominal Diameter: Refers to the outer diameter of the screw. The standard size for the SFY2550 is 25 mm.
  2. Lead: The lead signifies the distance the nut travels linearly when the screw rotates one full turn. The lead for the SFY2550 model is 25 mm. The lead determines the nut’s linear speed and the linear thrust the ball screw can provide. The speed (v) can be calculated as v = r * i, where r is the screw’s rotational speed and i is the lead. The linear thrust (F) can be calculated as F = (2 * π * T * n) / i, where T is the motor torque, n is the transmission efficiency, and i is the lead.
  3. Length: The length can refer to the total length or the threaded length. The threaded length consists of the total threaded length and the effective stroke, which is the theoretical maximum length of linear nut movement.

Nut Format and Accuracy

Various nut formats exist and are usually indicated by the first few letters in the model. There are various flange types, including round flange, single edge flange, double edge flange, and no flange. Nut lengths can be either single nut or double nut. The main difference between these two lies in their ability to adjust preload.

For SFY2550, the nut type is designed with a customer’s specific application in mind, whether it be high frequency, high precision, or other use cases.

Finally, the SFY2550 meets high precision standards, complying with domestic and international classifications. It ensures accurate, consistent operation, a testament to the quality commitment of ZLV.

Whether it’s for industry or innovation, ZLV’s SFY2550 3.969mm Milled Mute Self Lubricating Heavy Duty Ball Screw delivers outstanding performance that fulfills diverse requirements. Each element of the product showcases ZLV’s continuous pursuit of excellence, making it a reliable choice for your precision motion needs.

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