Torque Wrenches and Bars Specifications

The document provides detailed torque specifications for various torque wrenches and bars, identified by model numbers such as 590, 603/5, 666N/2, 599DGT/6, 606/10, 667N/20, 677/50, and others. Each model is associated with torque ranges expressed in Newton-meters (Nm), kilogram-force meters (Kgfm), and pound-force feet (lbf.ft). For example, models like 606/10X have torque values up to 100 Nm, while heavy-duty models like 677C/150 reach up to 1500 Nm.

Torque Ranges and Units

• Torque values range from as low as 0.3 Nm to as high as 2000 Nm depending on the tool model.
• Conversion factors are provided: 1 Nm = 0.10197 Kgfm = 0.7375 lbf.ft.
• Torque scales are presented in multiple units to accommodate different measurement preferences.

Fields of Use

The document categorizes torque wrenches and bars by their fields of use, indicating appropriate torque ranges for each tool type. This helps users select the correct tool based on the required torque application.

Torque Calculation Methodology

A formula is provided to calculate the effective torque when using accessories of different lengths than the standard. The formula accounts for the lever arm length differences between the standard accessory (LS), the bar length (LB), and the accessory length (LA):

C = M × (LB + LS) / (LB + LA)

Where:

• C = torque to set
• M = required torque
• LB = bar length
• LS = standard accessory length
• LA = accessory length

This ensures accurate torque application despite variations in accessory sizes.

Tensile Load and Tightening Torque Tables

The document includes tables detailing tensile loads and tightening torques for bolts with coarse and fine pitches. These tables specify:

• Resistant section dimensions
• Friction coefficients
• Tensile load values
• Recommended tightening torques

The data supports proper bolt selection and tightening procedures to ensure mechanical integrity and safety.

Key Recommendations and Best Practices

• Use the correct torque wrench or bar model according to the torque range required.
• Apply the torque calculation formula when using non-standard accessories to maintain accuracy.
• Refer to tensile load and tightening torque tables to select appropriate bolt classes and tightening parameters.
• Always consider friction coefficients and resistant section dimensions for precise torque application.

Overall, the document serves as a comprehensive technical reference for selecting, calculating, and applying torque using various tools and accessories, ensuring mechanical reliability and safety.