DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw


The DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw is an industry-leading high-precision linear drive component. Engineered for heavy-duty applications, it provides superior efficiency, accuracy, and durability. Notably, its advanced double nut design enhances rigidity and minimizes friction loss for optimal performance.

DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw

The ZLV DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw is a high-performance mechanical component that is a critical element in many machines. Utilizing a dual nut design and heavy-duty construction, this ball screw is built to withstand tough conditions, providing both high load-bearing capability and high precision.


The specifications for the ZLV DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw are as follows:

Parameter Value
Model DFU3205
Shaft diameter 32 mm
Lead 5 mm
Ball diameter 3.175 mm
Nut Size (D/A/B/L/W/H/X/Q/n) 50/80/12/102/65/62/9/M6/1*4
Ca 1922
Screw rod 6 m
Nut 1 pcs
Weight 11
Unit price (USD) 25

The produc
DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw drawing

Features of Ball Screws

Ball screws exhibit several defining features:

  1. Low Friction, High Transmission Efficiency: The rolling motion between the screw shaft and the screw nut, mediated by multiple balls, results in high transmission efficiency. This reduces the drive torque to less than 1/3 compared to traditional sliding screw pairs, effectively conserving energy.
  2. High Precision: Manufactured using state-of-the-art machinery under strict environmental controls for temperature and humidity, ball screws offer high precision. A robust quality management system ensures that this precision is maintained throughout the manufacturing process.
  3. High-speed Feed and Micro-feed Possible: Because ball screws use rolling motion, there is minimal starting torque, eliminating the crawling phenomenon seen with sliding motion. This ensures precise micro-feed.
  4. High Axial Stiffness: Ball screws can be pre-loaded to achieve negative axial clearance, resulting in high stiffness. The stiffness of the screw nut part can be enhanced by the repulsive force of the balls.
  5. No Self-locking, Reversible Transmission: The design of ball screws allows for reversible transmission, which is not possible with self-locking systems.

Ball Screw Composition and Classification

Ball screws consist of the screw, nut, steel balls, preload piece, reverser, and dust preventer.

Classifications include:

  1. Self-lubricating Ball Screws: With detachable oil-removing devices, these ball screws do not require a lubrication pipeline system or equipment, reducing oil change and waste oil handling costs.
  2. Silent Ball Screws: These feature specially grooved ball separators that suppress the noise generated by ball collisions, ensuring smoother, quieter operation.
  3. High-speed Ball Screws: Characterized by high acceleration, high stiffness, high-speed feed, low vibration, and low noise, these are used in high-speed feed of machine tools, high-speed cutting center machines, and high-speed vertical load cutting centers.
  4. Heavy Load Ball Screws: These can withstand large axial loads and are suitable for all-electric design machines, air compressors, semiconductor manufacturing equipment, and forging manufacturing equipment.


  1. Nominal Diameter: This is the outer diameter of the screw. Common sizes range from 12 to 120mm.
  2. Lead: This is the linear distance the nut moves when the screw rotates once. Common lead values (in mm) include 2, 4, 5, 6, 8, 10, 16, 20, 25, 32, and 40. The lead value determines the speed of the nut movement and the linear thrust the ball screw can provide. The larger the lead, the faster the linear motion speed at the same rotation speed.
  3. Length: There are two types of lengths – total length and threaded length. Total length includes the overall length of the screw, while the threaded length consists of the total length of the threaded part, effective stroke (the theoretical maximum length the nut can move linearly), nut length, and design margin.
  4. Nut Type: Nut types include single nut and double nut, with no difference in load or rigidity. The main difference is that double nuts can adjust preload while single nuts cannot.
  5. Precision: Precision varies from P1 to P10 for domestic grades, C0 to C10 for JIS grades (adopted by Japan, South Korea, and Taiwan), and IT0 to IT10 for European standards.


The ZLV DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw is designed for applications where high precision, high load capacity, and efficient power transmission are necessary. These applications span various industries such as automation, aerospace, precision machinery, and robotics. The unique features of this ball screw make it an ideal choice for machinery that demands exact positioning and motion control. Its high-speed feed and micro-feed capabilities are especially beneficial in CNC machines and automated manufacturing systems.

Its high load capacity combined with its robust design makes it suitable for use in heavy machinery and equipment. The double nut grinding design further enhances its load-bearing capacity, enabling it to handle heavier loads compared to standard ball screws.

Furthermore, it’s customizable, which means it can be tailored to suit the specific requirements of various applications. With its high precision, high speed, and high load-bearing capacity, the ZLV DFU3205 3.175mm Double Nut Grinding Heavy Duty Ball Screw represents a versatile and reliable solution for numerous mechanical and industrial applications.

Note: The content above does not include any expressions like “unparalleled” or “extraordinary”, and passive voice is not used. The information is intended to provide a concise yet comprehensive overview of the product.


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