SFY2040 3.175mm Milled Mute Self Lubricating Heavy Duty Ball Screw


The SFY2040 3.175mm Milled Mute Self Lubricating Heavy Duty Ball Screw is a state-of-the-art device providing superior transmission efficiency due to its low friction loss. It ensures high precision, high-speed feed, micro feed possibility, and excellent axial rigidity. Highly customizable, it excels in silent operation and robustness.

SFY2040 3.175mm Milled Mute Self Lubricating Heavy Duty Ball Screw

The SFY2040 3.175mm Milled Mute Self Lubricating Heavy Duty Ball Screw by ZLV is an innovative and robust product designed to meet the highest standards of quality and efficiency. It is designed with precision, high-speed feed, and micro feed potential, offering an impressive axial rigidity due to its pre-pressure design.

This product can be custom-tailored to suit the specific requirements of your applications. It delivers high transmission efficiency with minimal frictional loss, ensuring a performance that is significantly better than traditional sliding screws. With an unmatched accuracy ensured by high-grade machinery and strict quality control measures, the SFY2040 ball screw ensures precise micro feeds and a non-sliding movement.

Features and Parameters

  • High Transmission Efficiency: The ball screw offers a high transmission efficiency due to the rolling motion between the screw shaft and nut, with a power requirement less than 1/3 of a traditional sliding screw pair.
  • High Precision: Manufactured under strict control of temperature and humidity, the product ensures precision and quality.
  • High-Speed Feed and Micro Feed: The ball screw starts with minimal torque, preventing the crawling phenomenon associated with sliding motion and enabling precise micro feeds.
  • High Axial Rigidity: By applying pressure on the ball screw, the axial clearance achieves a negative value, leading to higher stiffness.
  • Reversible Transmission: The ball screw does not self-lock, ensuring the reversibility of transmission.

The SFY2040 ball screw is composed of a screw, a nut, steel balls, a pre-pressure piece, a reverser, and a dust protector.

Specification Details

Specifications Details
Model SFY2040
Shaft diameter 20 mm
Lead 20 mm
Steel ball diameter 3.175 mm
Nut size D: 39 mm, A: 62 mm, B: 10 mm, L: 48 mm, W: 50 mm, H: 41 mm,X: 5.5, Q:M6,n: 0.8*2
Load 1387
Weight Screw rod/M: 1.58, nut/pcs: 0.3
Unit price (USD) Screw rod/M: 10, nut/pcs: 11

The SFY2040 ball screw also offers customizable lengths, which include the overall length, threaded length, and effective travel.

SFY2040 3.175mm Milled Mute Self Lubricating Heavy Duty Ball Screw drawing

Types of Ball Screws

  1. Self-lubricating Ball Screw: Features a removable oil device, eliminating the need for lubrication pipeline systems and equipment, reducing oil change and waste oil disposal costs.
  2. Mute Ball Screw: Designed with a special groove between the steel balls, reducing noise generated by ball collision for a quieter and smoother operation.
  3. High-speed Ball Screw: Features high acceleration, high rigidity, high-speed feed, low vibration, and low noise. It is used in tool machine quick feeds, high-speed cutting center machines, and high-speed vertical load cutting centers.
  4. Heavy-duty Ball Screw: Capable of bearing high axial loads, suitable for all-electric design machines, air compressors, semiconductor manufacturing devices, and forging manufacturing devices.

Depending on the precision requirements, the SFY2040 ball screw comes in two variants: rolled ball screw with relatively lower precision for less demanding applications, and ground ball screw with high precision for high-accuracy applications.


The nominal diameter of the ball screw refers to the outer diameter of the screw, with common specifications ranging from 12 to 120 mm. The lead refers to the distance that the nut moves linearly for every complete revolution of the screw. This parameter is related to the speed of the nut movement and the linear thrust provided by the ball screw.

The nut’s movement speed (v) can be calculated using the formula: v = r * i, where r represents the rotation speed of the screw (r/s) and i represents the lead (mm). The relationship between the lead and the ball screw thrust (F) can be calculated using the formula: F = (2πT*n)/i, where T represents the torque provided by the motor (N·m), n represents the transmission efficiency (usually between 85% – 95% for ball screws), and i represents the lead (m).

The SFY2040 ball screw features a variety of nut styles, with the main difference between single and double nuts being the ability of the latter to adjust pre-pressure. The main types include round flange, single cut edge flange, double cut edge flange, and no flange. When selecting the type of nut, it’s recommended to choose the conventional form for easy maintenance and avoid spare parts lead time issues.

The SFY2040 ball screw’s precision adheres to international standards, including P1, P2, P3, P4, P5, P7, P10 levels for domestic classification; C0, C1, C2, C3, C5, C7, C10 levels for JIS; and IT0, IT1, IT2, IT3, IT4, IT5, IT7, IT10 for European standards.

Overall, the ZLV SFY2040 3.175mm Milled Mute Self Lubricating Heavy Duty Ball Screw ensures high-quality performance in various applications, providing both efficiency and precision. With its versatile features, it meets a broad range of needs in various industries, confirming its place as a reliable choice for mechanical devices.

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