YJZ-500E Series Computer Controlled High Strength Bolt Torque Axial Force Torsion Testing Machine

Main Applications and Performance Specifications

Standard:

EN 14399-2:2005

High-strength structural bolting assemblies for preloading – Part 2: Suitability test for preloading

ISO 14399-2

High-strength structural bolting assemblies for preloading – Part 2: Suitability test for preloading

GB/T 16823.2-1997

General rules for tightening threaded fasteners – Part 2: Preload

GB/T 50205-2020

Code for acceptance of construction quality of steel structures

NB/T 31082-2016

High-strength bolting assemblies for wind turbine tower flanges

GB/T 3098.1-2010

Mechanical properties of fasteners – Part 1: Bolts, screws and studs

GB 50205-2020

Standard for construction quality acceptance of steel structures

It is capable of testing the axial force, torque, and torque coefficient of large hexagon head high-strength bolt assemblies in sizes M16, M20, M22, M24, M27, and M30, with real-time display and printing.

When the axial force reaches the specified standard value, the device will automatically pause for one second, then reverse to release the specimen.

The tester calculates the torque coefficient automatically based on the measured axial force and torque, and displays the result in real time.

Upon completing one batch of tests, the device automatically calculates the average axial force, average torque, average torque coefficient, standard deviation, and coefficient of variation for that group of specimens.

The control system can store and cyclically update 32 sets of test data, which can be retrieved and printed at any time.

Optional Function:

If equipped with an additional torque-shear type electric wrench, the device can also perform preload testing on torque-shear type bolts.