Introducing the NKYJZ-500E-1000E-1500E, a state-of-the-art Computer Controlled High Strength Bolt Torque Axial Force Torsion Testing Machine. This cutting-edge equipment from Jinan Nake Test Equipment Co., Ltd. offers unrivaled precision and efficiency for testing high-strength bolts under various conditions. With customizable features to suit specific testing needs, this machine epitomizes advanced engineering and reliability, ensuring your products meet the highest industry standards.
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 state-of-the-art machine expertly tests the axial force, torque, and torque coefficient of large hexagon head high-strength bolt assemblies in sizes M16, M20, M22, M24, M27, and M30, featuring real-time display and printing capabilities for utmost convenience.
Effortlessly, the device pauses for a single second when the axial force reaches its set standard value, then elegantly reverses to release the specimen.
With brilliant precision, the tester calculates the torque coefficient automatically by using the measured axial force and torque, and displays the result instantly.
After completing each batch of tests, the innovative device swiftly calculates and presents the average axial force, average torque, average torque coefficient, standard deviation, and coefficient of variation for that specific group of specimens, ensuring thorough analysis.
The advanced control system is proficient at storing and cyclically updating 32 sets of test data, ready for retrieval and printing whenever needed.
Optional Function:
With the addition of an optional torque-shear type electric wrench, this versatile device can also conduct preload testing on torque-shear type bolts, expanding its functionality.
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 fluctuation not exceeding 2°C per hour
- Relative humidity: ≤80%
- Voltage fluctuation: within ±10% of rated voltage
- Power supply: 380V / 50Hz, three-phase five-wire system, power consumption 1.5 kW
- Free from significant electromagnetic interference
- No surrounding vibrations or corrosive media
- Ensure at least 0.7 m of clearance around the machine; workspace should be pristine and dust-free for optimal performance.

Pioneering the forefront of testing equipment innovation for over two decades, Jinan Nake Test Equipment Co., Ltd., known as NAKE Group, stands as a beacon of excellence in the industry. With a dynamic team of over 20 R&D experts, 50+ masterful production staff, and a dedicated after-sales team exceeding 10 professionals, we possess the expertise and commitment to quality that sets us apart. Our cutting-edge facilities cover more than 4,000 square meters, providing a robust infrastructure for innovation. Proudly certified as a National High-Tech Enterprise in China, we embody the pinnacle of technological advancement and reliability.
At NAKE, we are unwavering in our commitment to quality. Our ISO 9001:2015-certified quality management system is a testament to our meticulous control over every production phase. We strategically source around 5,000 tons of raw materials yearly, leveraging in-house machining and assembly to maintain a 3% cost advantage, setting us apart from industry counterparts. This strategic approach guarantees not only consistency but also outstanding quality in every product.
NAKE has achieved remarkable milestones over the last five years: a steadfast on-time shipment rate of over 98.2%, a minimal product failure rate of less than 0.3%, and an impressively low rework rate under 0.28%. These figures are a testament to our relentless pursuit of precision, reliability, and quality mastery. Moreover, our OEM manufacturing services support over 20 Chinese exporters, facilitating the production of approximately 600 units of mechanical testing equipment annually, reinforcing our leadership and commitment to excellence in the field.
Our brand, NAKE Test Equipment, is a trusted name across China, with a strong international presence in over 30 countries. As a direct manufacturer with robust R&D and production capabilities, we deliver unparalleled technical expertise, bespoke product customization, and exceptional cost efficiency, distinguishing us from distributors and intermediaries.




After-Sales Service Introduction: At Jinan Nake Test Equipment Co., Ltd., our commitment to you extends beyond the purchase. We take pride in offering an unparalleled after-sales service that ensures your satisfaction and the long-lasting performance of your product.
1. One-Year Product Warranty: Experience peace of mind with our comprehensive one-year warranty, thoughtfully designed to safeguard your investment and ensure the consistent excellence of your testing machine.
2. Permanent Free Software Updates: Stay ahead of the curve with our perpetual free software updates, keeping your machine innovative and efficient by integrating the latest technological advancements.
3. Permanent Maintenance Services: With our enduring maintenance services, you can rest easy knowing your machine will always perform at its best. We provide unwavering support to keep your operations running smoothly.
4. Remote Video Guidance: Embrace the convenience of our remote video guidance, offering expert assistance whenever you need it, right at your fingertips, ensuring you make the most of your equipment's capabilities.
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.