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YJZ-5000E Microcomputer-Controlled Fully Automatic High-Strength Bolt Tester (New Standard)

This test system is designed in accordance with user‑specific testing requirements and is primarily intended for the evaluation of large, high‑strength bolted connections used in wind‑energy equipment. It is employed for static torsional testing of high‑strength bolts, meeting the specifications outlined in GB 1231‑2024 “Technical Requirements for High‑Strength Large Hexagonal Bolts, Large Hexagonal Nuts, and Washers for Steel Structures” and GBT 32076.8‑2017. The system comprises a mainframe, a testing mechanism, a loading mechanism, an auxiliary subsystem, a control and data‑acquisition system, a computer equipped with dedicated test software, and various ancillary components.

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Steel Structure Testing Equipment

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lbt@lbt.ltd

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+86-15102211717

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YJZ-5000E Microcomputer-Controlled Fully Automatic High-Strength Bolt Tester (New Standard)

Description

Product Introduction:

This test system is designed according to user‑specific testing requirements and is primarily intended for the evaluation of large, high‑strength bolted connections used in wind‑energy equipment. It performs static torsional tests on high‑strength bolts, complying with the provisions of GB 1231‑2024 “Technical Specifications for High‑Strength Large Hexagonal Bolts, Large Hexagonal Nuts, and Washers for Steel Structures” and GBT 32076.8‑2017. The system comprises a mainframe, a testing mechanism, a loading mechanism, an integrated control and data‑acquisition system, a computer with dedicated test software, and various accessories. It is an ideal high‑performance testing solution for industrial and mining enterprises, quality‑inspection agencies, research institutes, and higher‑education institutions. The system is suitable for conducting torsion‑tension mechanical performance tests on high‑strength bolts and large hexagonal bolts, enabling the measurement of bolt‑nut preload parameters such as torque, rotation angle, and axial force. It can also determine the torque coefficient of large‑size, high‑strength bolted joints, while automatically displaying results and storing and outputting test data. The instrument autonomously records test data and, via a microcomputer, calculates key statistical metrics including average axial force, average torque, average torque coefficient, standard deviation, and coefficient of variation. Furthermore, it generates technical indicators such as the relationships among torque coefficient, torque–axial force, and rotation angle, and produces corresponding curves depicting torque–axial force–torque coefficient correlations.

Technical Specifications:

Parameter Category	Parameter content
Maximum torque	5000Nm
Effective torque measurement range	50–5000 Nm
Maximum rotational speed	1r/min
Torque tolerance and repeatability error	≤±1%
Maximum axial bolt force	800kN
Effective measurement range of bolt axial force	30-800kN
Compatible bolt specifications	Hexagonal bolt M12/M16/M20/M22/M24/M27/M30/M33/M36
Bolt length range	50-350mm
Axial force tolerance and repeatability error	≤±1%
Power supply voltage	AC 220±10% 50Hz
Security Protection Feature	Equipped with protection functions such as overload and specimen fracture detection.
Data display method	The computer screen displays the experimental parameter values and the corresponding test curves in real time.

Main configuration:

Serial number	Project		Quantity	Note
1	Host	Workbench, frame	1 set
		Torsion testing apparatus	1 set
		Axial Bolt Axial Force Testing Device	1 set
2	Test fixture		1 set
3	Load speed control system		1 set
4	High-precision symmetric torque sensor		1 piece
5	High-precision bolt axial force sensor		1 piece
6	Low-speed, high-torque reducer		1 unit
7	Control system		1 set
8	Electrical Control and Data Acquisition System		1 set
9	Software		1 set
10	Computer		1 unit
12	Linear guide rail		1 set
13	Bolt torsion attachment		1 set
14	Protective cover		1 set
15	Random Data		1 set	Instruction manual, certificate of conformity, packing list
16	Special attachment for large hexagon bolts		1 set	Test fixtures for M12/M16/M20/M22/M24/M27/M30/M33/M36

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FAQs

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Can you customize fixtures or test machines based on our special test requirements? How about after-sales service and warranty?

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Customer Reviews

European Plastic Pipe Manufacturer｜Purchase: Ring Stiffness & Hydrostatic Burst Tester

From Thomas Bennett, Quality Director, UK plastic pipe factory

2026.06.05

★★★★★

“We have purchased two sets of pipe testing equipment from Laibote (Tianjin) for 18 months. The ring stiffness and hydrostatic burst testing machines run stably for daily batch inspection, test data matches ISO standard requirements precisely, and the intelligent test software is easy for our operators to master. Their after-sales team offers timely remote technical guidance whenever we have operational problems, spare parts supply is efficient. We have arranged a second bulk order for our new production workshop and will recommend Laibote’s testing machines to our industry partners across Europe.”

Middle East Construction Lab｜Purchase: Universal Electronic Testing Machine & Geotextile Test Equipment

From Mohamed Kareem, Lab Manager, UAE third-party construction inspection institute

2026.06.05

★★★★★

“We compared multiple testing equipment brands from Europe and China before cooperating with Laibote. Their WDW universal tester and full-set geotextile testing instruments meet local construction testing standards perfectly. Custom fixtures tailored per our specimen specifications save much testing time. Pre-sale technical communication was patient and professional; engineers provided online operation training after goods arrived. Stable machine performance greatly improves our laboratory’s detection efficiency, we are satisfied with cost performance and overall service.”

Southeast Asia Rubber & Polymer Factory｜Purchase: Vicat Softening Point & Tensile Testing Machine

From Tanaka Hiroshi, R&D Supervisor, Indonesia rubber materials enterprise

2026.06.05

★★★★★

“Laibote’s Vicat softening point tester and electronic tensile machine have been applied to our raw material incoming inspection and new formula development for over one year. High testing accuracy effectively controls our product defect rate. What impresses us most is their responsive after-sale service; technical staff reply our troubleshooting requests within 24 hours even for time zone differences. Compared with expensive European brands, Laibote’s equipment balances quality and price excellently, we plan to expand procurement of auxiliary testing instruments next quarter.”

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YJZ-5000E Microcomputer-Controlled Fully Automatic High-Strength Bolt Tester (New Standard)

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