The Ball Screw SCR 3205 is a fundamental drive component for industrial automation systems, designed to convert rotational motion into linear motion with high efficiency and precision. In this specific model, the “32” designation indicates a nominal shaft diameter of 32 millimeters, while the “05” signifies a lead of 5 millimeters per full revolution of the screw. This lead value offers an optimal balance for applications requiring high-resolution positioning, allowing for precise and repeatable linear displacement for each angular degree of motor rotation. The basic principle of operation involves balls rolling within helical grooves on the screw and matching grooves inside the nut. This rolling motion minimizes sliding friction, ensuring high mechanical efficiency and low heat generation.
The SCR 3205 series ball screw is manufactured from specially alloyed hardened steel, shaped using the rolling method to provide superior mechanical properties. This manufacturing process optimizes the material’s grain structure, increasing the screw’s core strength while hardening the surface to 55 HRC (Rockwell C Hardness). This high surface hardness offers exceptional resistance to wear, significantly extending the screw’s operational life and contributing to the preservation of positioning accuracy even during prolonged use. The integrated flanged ball nut features a four-row ball configuration, distributing axial and radial loads over a larger surface area. This design provides high load-carrying capacity, increased rigidity, and minimal elastic deformation. An integrated double seal system prevents dust, dirt, and other environmental particles from entering the nut, protecting the ball and raceway surfaces and thereby maintaining the system’s precision and longevity. These technical specifications make the SCR 3205 an ideal drive component for a wide range of industrial applications, including CNC machining centers, robotic manipulators, automated assembly lines, and precision measuring instruments.
Advantages of Ball Screw SCR 3205
High Positioning Accuracy and Repeatability: With its precise 5 mm lead and specialized manufacturing tolerances, the Ball Screw SCR 3205 offers linear positioning at the micro-meter level and operational repeatability. This feature plays a crucial role in optimizing the geometric tolerances and surface quality of the final product, especially in applications like CNC machines where cutting tool paths or workpiece positioning are critical. The low friction coefficient of the ball nut mechanism reduces system inertia, enabling fast response times and precise micro-feeds, which enhances consistency and efficiency in production processes.
Superior Axial Load Capacity and Rigidity: This ball screw exhibits exceptional resistance to both static and dynamic axial loads due to the four-row ball configuration in its flanged ball nut. The four rows of balls distribute the load across a greater number of contact points, minimizing Hertzian contact stresses on the ball and raceway surfaces. This design ensures that the system exhibits minimal elastic deformation even under high thrust forces, offering a critical advantage in rigidity and stability for applications requiring precise handling and positioning of heavy workpieces or tool heads.
Long Operational Life and Minimum Maintenance Requirement: The hardened alloy steel screw of the Ball Screw SCR 3205, with its 55 HRC surface hardness, demonstrates high resistance to abrasive particles and fatigue stress. This hardness significantly reduces wear and plastic deformation on the surfaces where the balls make contact. Furthermore, the integrated double seal system within the ball nut effectively prevents dust, chips, moisture, and other contaminants from entering the nut from the working environment. This protection ensures the internal mechanism remains clean, extends the lubricant’s life, and preserves the integrity of the ball raceways, thereby extending maintenance intervals and reducing the total cost of ownership while ensuring uninterrupted operational reliability.
Technical Specifications and Capacity
Feature
Value/Description
Screw Diameter
32 mm
Lead
5 mm (5 mm linear travel per revolution)
Manufacturing Method
Rolled – High strength and precision
Surface Hardness
55 HRC (Rockwell C Hardness) – Superior wear resistance
Nut Type
Flanged Ball Nut (Compatible with SFUR series)
Number of Ball Rows
4 rows – High axial force capacity and rigidity
Accuracy Class
High Precision (Compliant with industrial standards)
Dust Protection
Integrated Double Seal on Nut – Prevents dust and dirt ingress
Technical Frequently Asked Questions (FAQ)
What does the “SCR” series designation mean for the performance and manufacturing characteristics of the Ball Screw SCR 3205?
The “SCR” series designation refers to Mermak CNC’s Standard High-Performance Series ball screws, indicating that these products are manufactured using the rolling method. The rolling process creates compressive stresses on the screw’s surface, enhancing its fatigue resistance and surface hardness. This manufacturing method results in a smoother surface finish and a more homogeneous grain structure compared to machining, contributing to more stable operation and a longer lifespan under dynamic loads. The SCR series is optimized for applications requiring high precision, reliability, and cost-effectiveness in industrial automation.
What mechanical advantages does the 4-row ball configuration of the SCR 3205 offer compared to single or double-row ball nuts?
The 4-row ball configuration of the SCR 3205 provides significant mechanical advantages over single or double-row ball nuts. Four rows of balls distribute axial and radial loads across a greater number of contact points, substantially reducing the unit contact stress on the ball and raceway surfaces. This increases both static and dynamic load-carrying capacity while enhancing system rigidity and torsional resistance. More ball contact points ensure more uniform load distribution among the balls, reducing wear and extending the ball screw’s operational life. Furthermore, increased rigidity minimizes vibrations and elastic deformation, especially in high-speed and precision positioning applications, ensuring more stable and accurate movement.
What are the technical implications of the 55 HRC surface hardness of the Ball Screw SCR 3205 on its performance and durability?
The 55 HRC surface hardness of the Ball Screw SCR 3205 is critical for its performance and durability. This high hardness value ensures that the screw’s surface exhibits exceptional resistance to abrasive particles, friction, and contact fatigue. While local stresses during ball rolling on a softer material might lead to permanent deformation or wear, the 55 HRC hardened surface minimizes such deformations. This allows the ball screw to maintain its precision and lead accuracy over extended operational periods. Additionally, high surface hardness increases the screw’s overall fatigue life, guaranteeing reliable and continuous operation even under heavy and continuous loads, thus extending maintenance intervals and reducing the total cost of ownership.
How does the integrated double seal system of the SCR 3205 provide protection in harsh industrial environments, and what is its impact on maintenance intervals?
The double seal system integrated into the SCR 3205’s ball nut offers a multi-layered protection mechanism against external factors in harsh industrial environments. These seals physically prevent the ingress of contaminants such as dust, chips, metal particles, moisture, and aggressive coolants into the nut. Maintaining a clean internal environment is vital for preserving the integrity of the ball and raceway surfaces, as contaminants can cause micro-scratches and pitting due to their abrasive nature. The double seal design provides superior sealing compared to single seals, more effectively retaining lubricant within the nut and preventing external particles from entering. This protection minimizes internal mechanical wear, extends the ball screw’s operational life, and significantly lengthens maintenance intervals, thereby maximizing the system’s uptime. Mermak has 16 years of experience, operating from our factory and warehouse in Ankara Uzay Sanayi. Our website displays up-to-date stock quantities and prices. Stocked products are dispatched directly from our warehouse, eliminating production waiting times. We ensure careful packaging, meticulous invoice and document handling, and collaborate with reliable logistics partners. The Mermak team actively monitors the shipment process. Upon request, we can arrange product videos or factory viewings via WhatsApp or other contact channels. We proudly supply to the United Kingdom, United States, Canada, Australia, Ireland, New Zealand, and South Africa, alongside similar countries and international markets.
