Overview: This document provides detailed specifications for a range of extension springs, including their dimensions, load capacities, and material properties. The data is organized into tables that list various parameters for each spring model.

Specifications: The document lists extension springs with varying internal diameters (I/D), lengths, and load capacities. Each spring is identified by a unique model number (e.g., SR1, SR2, etc.). Key specifications include:

• Load capacity in Newtons and kilograms.
• Dimensions such as diameter (D1, D2), length (L), and other relevant measurements (H, J).
• Spring ends type and number.

Procedures and Standards: The document specifies that the load capacity can vary by ±10% to meet specific requirements. It also mentions average fatigue life cycles for different spring models, indicating durability and performance expectations.

Recommendations: The document suggests that the internal diameter and other dimensions are reference values and may be adjusted to meet specific load specifications. It emphasizes the importance of adhering to the specified load range to ensure optimal performance and longevity.

Key Data from Tables: The tables provide a comprehensive list of spring models with their respective specifications. For example, model SR1 has a load capacity of 726 Newtons, a diameter of 3.175 mm, and a length of 203 mm. The tables also categorize springs based on their average fatigue life, ranging from 5,000 to 40,000 cycles.

Conclusion: This document serves as a technical reference for selecting the appropriate extension spring based on specific load and dimensional requirements. It highlights the importance of considering fatigue life and load variability in the selection process.