What is ISO 2901:2016 ISO metric trapezoidal screw threads — Basic and design profiles
ISO 2901:2016 specifies the basic and design profiles for metric trapezoidal screw threads, which are commonly used for power transmission and linear motion applications. The standard provides detailed information about the dimensions, tolerances, and other characteristics of these screw threads. Including the thread profile angle, pitch, and lead.
It also defines the terminology and symbols used to describe these threads and provides guidance on how to measure and verify their characteristics. The standard is intended to ensure compatibility and interchangeability of metric trapezoidal screw threads across different manufacturers and applications.
Requirements of ISO 2901:2016
Basic profile: The basic profile of the screw thread must conform to the dimensions and tolerances specified in the standard. The basic profile includes the thread angle, the thread height, and the root radius.
Design profile: The design profile of the screw thread is based on the basic profile and includes additional dimensions and tolerances. The design profile includes the major diameter, the minor diameter, the pitch diameter, and the pitch.
Thread series: This standard specifies four thread series – coarse, fine, extra fine, and special – for different applications and requirements. Each thread series has different pitches and tolerances.
Thread tolerance classes: The standard specifies six tolerance classes – 4g, 6g, 6e, 8g, 8e, and 9e – based on the level of accuracy required for the screw thread. Each tolerance class has different limits for the major, minor, and pitch diameters.
Thread designation: The screw thread must be designated by specifying the nominal diameter, pitch, and thread series.
Measurement and verification: The standard provides guidance on how to measure and verify the characteristics of the screw thread. Including the thread profile, major and minor diameters, pitch diameter, and pitch.
Therefore, ISO 2901:2016 aims to ensure the compatibility and interchangeability of metric trapezoidal screw threads across different manufacturers and applications. By providing standardized specifications for their basic and design profiles.
Benefits of ISO 2901:2016
Standardization: The standard provides a uniform and standardized set of specifications for the basic and design profiles of metric trapezoidal screw threads, which ensures compatibility and interchangeability across different manufacturers and applications.
Improved quality: By defining the dimensions, tolerances, and other characteristics of the screw thread, the standard helps to ensure that the screw threads are manufactured to a consistent and high level of quality.
Increased efficiency: Standardization of screw threads reduces the need for custom parts, which saves time and reduces costs in the design and manufacturing process. Additionally, the use of standardized screw threads can simplify assembly and maintenance procedures.
International acceptance: ISO 2901 is an internationally recognized standard, which facilitates communication and trade between different countries and regions.
Better performance: The standard helps to ensure that screw threads are designed and manufactured to meet the required performance criteria for specific applications.
Therefore, ISO 2901:2016 provides a framework for the design and manufacture of metric trapezoidal screw threads that offers a range of benefits. Including improved quality, increased efficiency, and better performance.
Also read:
ISO 2902:2016 ISO metric trapezoidal screw threads — General plan
ISO 2902:2016 provides general information and specifications for ISO metric trapezoidal screw threads.
These screw threads are commonly used in industrial applications, such as for power transmission or for moving machine components. In addition, The standard specifies the basic dimensions, tolerances, and designations for trapezoidal screw threads. As well as the formulas used to calculate their parameters.
It also provides information on the manufacturing process, material properties. And marking requirements for these screw threads.
ISO 2902:2016 is intended to ensure the interchangeability and compatibility of trapezoidal screw threads used in different applications. As well as to facilitate communication between manufacturers and users of these screw threads.
ISO 2903:2016 ISO metric trapezoidal screw threads — Tolerances
ISO 2903:2016 provides specifications for the tolerances of ISO metric trapezoidal screw threads.
This standard specifies the limits of size for the major diameter, pitch diameter, minor diameter, and pitch of the trapezoidal screw threads. It provides information on the various tolerance classes for these dimensions, which determine the degree of accuracy required for the screw threads to function properly.
The standard also specifies the methods for measuring the various dimensions and the allowable deviations from the nominal values.
ISO 2903 is intended to ensure the interchangeability and compatibility of trapezoidal screw threads used in different applications. As well as to facilitate communication between manufacturers and users of these screw threads. It is important to note that this standard should be used in conjunction with ISO 2902:2016, which provides the general plan and specifications for ISO metric trapezoidal screw threads.
ISO 2904:2020 ISO metric trapezoidal screw threads — Basic dimensions
ISO 2904:2020 specifies the basic dimensions for ISO metric trapezoidal screw threads.
This standard provides the basic dimensions, such as the thread profile, thread angle, thread pitch, and major diameter, for trapezoidal screw threads with diameters ranging from 8 mm to 300 mm. It also provides information on the various types of trapezoidal screw threads. Such as single-start, double-start, and multiple-start threads, and their corresponding dimensions.
ISO 2904 is intended to ensure the interchangeability and compatibility of trapezoidal screw threads used in different applications. As well as to facilitate communication between manufacturers and users of these screw threads.
It is important to note that this standard should be used in conjunction with ISO 2902:2016, which provides the general plan and specifications for ISO metric trapezoidal screw threads, and ISO 2903:2016, which provides specifications for the tolerances of these screw threads.
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Read About : ISO 2867:2011
