NKYJZ-500E-1000E-1500E Computer Controlled High Strength Bolt Torque Axial Force Torsion Testing Machine
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
Our machine is meticulously engineered to test axial force, torque, and torque coefficient of large hexagon head high-strength bolt assemblies, covering sizes M16, M20, M22, M24, M27, and M30, with enhanced features like real-time display and seamless printing.
Upon reaching the specified axial force, this advanced device pauses for a second, then elegantly reverses to release the specimen, ensuring precision.
The system automatically computes the torque coefficient using the measured axial force and torque, providing results with real-time visualization.
Once a batch of tests is completed, the device swiftly calculates the average axial force, average torque, average torque coefficient, standard deviation, and coefficient of variation for the entire group of specimens, ensuring comprehensive analysis.
Our smart control system is capable of storing and cyclically updating 32 sets of test data, effortlessly retrievable and printable at any desired moment.
Optional Function:
With the addition of a torque-shear type electric wrench, this versatile device also performs preload testing on torque-shear type bolts, expanding its range of capabilities.
Technical Parameters
Parameter |
Specification |
Power Supply Voltage |
Control System: 220V AC; Motor: 380V AC |
Motor Power |
0.37 kW |
Motor Speed |
0.5 r/min |
Axial Force Measurement Range |
20-500 kN |
Torque Measurement Range |
20-2000 N·m |
Bolt Diameter Range |
M16 - M30 |
Bolt Length Range |
55 mm - 280 mm |
Test Accuracy |
Axial Force ±1.0%; Torque ±1.0% |
Weight |
Approx. 500 kg |
Operating Conditions
- Ambient temperature: 10-35°C, with temperature stability not exceeding 2°C per hour
- Relative humidity: ≤80%
- Voltage fluctuation: maintained within ±10% of the rated voltage
- Power supply: 380V / 50Hz, utilizing a three-phase five-wire system, with a power consumption of just 1.5 kW
- Designed to operate free from significant electromagnetic interference
- No surrounding vibrations or corrosive media
- Ensure at least 0.7 m of strategic clearance around the machine; the workspace must be kept clean and dust-free for optimal performance

As a preeminent force in the testing equipment industry, Jinan Nake Test Equipment Co., Ltd. has flourished for over two decades. Our NAKE Group is fueled by innovation with a team of more than 20 R&D specialists, over 50 skilled production personnel, and a suite of dedicated after-sales service members exceeding 10 professionals. Our cutting-edge manufacturing and office infrastructure spans an impressive 4,000 square meters, and we are honored to hold the prestigious certification as a National High-Tech Enterprise in China.
Boasting an ISO 9001:2015-certified quality management system, we exert meticulous control over every facet of production. By procuring around 5,000 tons of high-quality raw materials annually and maintaining comprehensive in-house machining and assembly prowess, we secure a competitive 3% manufacturing cost advantage over industry counterparts while ensuring unparalleled product consistency.
Over the past five years, our relentless pursuit of excellence has led to a stellar on-time shipment rate surpassing 98.2%, an impressively low product failure rate below 0.3%, and a rework rate under 0.28%. These metrics highlight our unwavering dedication to precision, dependability, and superior quality. Furthermore, our prowess extends to OEM manufacturing services for over 20 Chinese exporters, where we produce roughly 600 units of mechanical testing equipment annually, solidifying our stronghold in the industry.
Our brand, NAKE Test Equipment, is celebrated across China and beyond, with our innovative products reaching the shores of over 30 countries worldwide. As a direct manufacturer with autonomous R&D and production expertise, we proffer unmatched advantages over distributors and intermediaries by way of technical proficiency, tailored product solutions, and cost efficiency.




After - Sales Service Introduction:
1. Enjoy peace of mind with our comprehensive one-year warranty, ensuring your investment is safeguarded.
2. Benefit from our commitment to technological advancement with lifetime access to complimentary software updates, keeping your equipment up-to-date and efficient.
3. Experience uninterrupted support with our lifetime maintenance services, ensuring your machine operates at peak performance year after year.
4. Take advantage of our expert remote video guidance, providing you with the assistance you need, wherever you are, whenever you need it.
1. Is your company a manufacturer or a trading company?
We are a professional manufacturer of materials testing equipment with independent R&D, production, and assembly capabilities. All core components are machined and assembled in-house, ensuring superior quality control, production efficiency, and cost management. Compared to distributors or intermediaries, we offer greater technical expertise, product customization, and competitive pricing.
2. How do you ensure product quality?
We implement strict quality control measures:
ISO 9001:2015-certified quality management system ensures process stability.
In-house machining and assembly of key components guarantee consistency and reliability.
Over the past five years, our product failure rate has remained below 0.3%, with a rework rate under 0.28%, significantly outperforming industry averages.
3. What is your typical lead time?
With an efficient production system, we have achieved an on-time delivery rate exceeding 98.2% over the past five years. Lead times vary based on order volume and product type:
Standard models: 15-30 days
Customized products: Lead time depends on design complexity
4. Do you offer OEM or ODM services?
Yes, we provide OEM manufacturing services for 20+ Chinese exporters, producing approximately 600 units of testing equipment annually. We offer custom branding, software interface modifications, and functional upgrades to meet client requirements while ensuring compliance with international standards.
5. What industries are your testing machines used in?
Our testing equipment is widely applied in various industries, including:
Metals & composites
Rubber & plastics
Construction & civil engineering
Aerospace & automotive manufacturing
Research institutes & university laboratories
6. What after-sales services do you provide?
We offer comprehensive after-sales support, including:
Remote technical assistance: Installation guidance, troubleshooting, and maintenance support via phone, email, or video.
On-site services (available in select regions): Professional engineers can provide installation training and repair services if needed.
Spare parts supply: Long-term availability of original factory parts to ensure stable equipment operation.
Equipment upgrades & software updates: Functional upgrades and software optimizations as per customer needs.
7. How can I request a quote or place an order?
You can contact us through:
Phone/Email Inquiry: Provide your specific requirements, and our sales team will respond within 24 hours.
Custom Solutions: If you have special testing needs, our engineering team can offer tailored solutions and detailed quotations.
8. What are your competitive advantages over industry peers?
Full in-house production for superior quality control: Key components are machined in-house, ensuring consistency and durability.
Manufacturing cost advantage: Our optimized supply chain results in a 3% lower production cost compared to industry averages, providing a cost-effective solution for customers.
Exceptional delivery performance: 98.2%+ on-time delivery rate, ensuring smooth project execution.
Global market experience: Products exported to 30+ countries, meeting multiple international standards.