WLG-5000 Computer-Controlled Electro-Hydraulic Servo Horizontal Bolt Tensile Testing Machine
1. Product Overview
The WLG-5000 horizontal tensile testing machine is expertly engineered to perform both tensile and constant-load tensile tests, boasting an impressive rated capacity of up to 5000 kN. It is specifically designed for assessing the tensile strength of high-strength bolts and other metallic products or materials with precision and reliability.
The meticulously crafted test frame features a robust reaction structure with front and rear rigid supports, complemented by four Φ140 mm high-strength steel columns. A bidirectional hydraulic cylinder, strategically mounted at the center of the left support, works in harmony with a high-precision bidirectional tension-compression load cell fixed at the piston's end. This assembly is directly connected to the left-side tensile grip. Meanwhile, the right-side grip is securely mounted on a lead screw at the right support, both grips are engineered with guide devices to ensure perfect coaxial alignment for flawless testing.
A manually operated safety mesh is elegantly positioned atop the machine, enhancing safety and ease of use. With its seamless operation, heightened safety features, and dependable performance, this machine is the ideal choice for testing large-size fasteners and structural bolts with confidence.
2. Applicable Standards
ISO 7801:1984 Metallic materials - Wire - Reverse bend test
ISO 15630-3:2010 Steel for the reinforcement and prestressing of concrete - Test methods - Part 3: Prestressing steel
GB/T 238-2013 Metallic materials - Wire - Reverse bend test method
GB/T 21839-2019 Prestressed concrete steel test method
GB/T 228.1-2010 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 2611-2007 General technical requirements for testing machines
GB/T 3098.1-2010 Mechanical properties of fasteners - Bolts, screws and studs
NB/T 31082-2016 High-strength bolt assemblies for wind turbine tower connection
DL/T 284-2012 Hot-dip galvanized bolts and nuts for overhead transmission lines and power fittings
JGJ 82-2011 Technical specification for high-strength bolt connections of steel structures
3. Performance Features
- State-of-the-art computer-controlled system with automatic tracking and precise measurement of force and displacement, ensuring unparalleled accuracy.
- Flexible loading rate settings and automatic range switching for test force to accommodate diverse testing needs.
- Advanced constant-load tensile testing capability.
- Exceptional load holding capability for consistent results.
- Constant displacement rate control for steady operations.
- Constant force rate control for uniform performance.
- Real-time display of crucial parameters including load, loading rate, displacement, time, and comprehensive test curves.
- Quick, precise digital calibration of load and displacement with built-in overload, full-scale, and position protection features for enhanced safety and performance.
- Sophisticated data management with options for saving, retrieving, re-analysis, local curve zoom-in, and re-editing, empowering users with ultimate control.
- Effortless automatic generation and printing of detailed test reports and curves, streamlining the documentation process.
4. Main Technical Specifications
Item |
Specification |
Maximum Load |
5000 kN |
Measurement Range |
100-5000 kN |
Resolution |
0.1 kN |
Indication Accuracy |
±1% |
Piston Stroke |
500 mm |
Displacement Range |
0-300 mm |
Displacement Accuracy |
±1% F.S |
Displacement Resolution |
0.01 mm |
Loading Speed |
0-50 mm/min |
Load Holding Time |
≥15 min |
Load Holding Accuracy |
±1% |
Max Tensile Specimen Length |
1200 mm |
Power Supply |
7.5 kW |
Noise Level |
≤75 dB |
Dimensions (L×W×H) |
4000 × 800 × 1000 mm |
Weight |
~6000 kg |
5. Packing List
No. |
Item |
Specification |
Quantity |
1 |
Main frame (incl. high-precision load cell) |
5000 kN |
1 set |
2 |
Electro-hydraulic servo system (Rexroth pump) |
25 MPa |
1 set |
3 |
Horizontal tensile machine controller |
Servo console |
1 set |
4 |
Static test software |
- |
1 set |
5 |
Draw-wire displacement transducer |
5000 lines |
1 set |
6 |
Bidirectional hydraulic cylinder |
25 MPa, 5000 kN |
1 set |
7 |
Lenovo-brand computer |
- |
1 unit |
8 |
Bolt tensile fixtures for wind turbine tower bolts |
M30-M72 |
1 set |
9 |
Nut proof load fixtures for wind turbine tower bolts |
M30-M72 |
1 set |
10 |
Wedge-type tensile accessories |
M30-M72 |
1 set |

As an eminent leader in the realm of testing equipment manufacturing, Jinan Nake Test Equipment Co., Ltd., a beacon of innovation and precision, boasts over 20 years of unparalleled industry expertise. The NAKE Group thrives with a robust team of more than 20 R&D specialists, complemented by over 50 production maestros and an elite after-sales service ensemble exceeding 10 members. Our cutting-edge manufacturing and office facilities, sprawling over 4,000 square meters, stand testament to our commitment to excellence. Proudly, we are recognized as a National High-Tech Enterprise in China, reflecting our relentless pursuit of technological advancement and quality.
Embodying a steadfast commitment to quality, our operations are governed by the ISO 9001:2015-certified management system, ensuring meticulous oversight at every production juncture. By procuring an impressive 5,000 tons of raw materials annually and maintaining comprehensive in-house machining and assembly proficiencies, we secure a 3% manufacturing cost advantage over industry counterparts, all while delivering exceptional product consistency and unmatched excellence.
In a remarkable demonstration of dedication and precision, we have sustained an unrivaled on-time shipment rate exceeding 98.2% over the past five years. Our product failure rate remains enviably low at under 0.3%, with a rework rate maintained below 0.28%. This underscores our unwavering commitment to precision, reliability, and the pinnacle of quality excellence. Beyond our superior performance metrics, we furnish OEM manufacturing services for over 20 Chinese exporters, consistently producing approximately 600 units of mechanical testing equipment annually, thereby cementing our status as a vanguard in the industry.
Our brand, NAKE Test Equipment, enjoys widespread acclaim throughout China, with our cutting-edge products extending their reach to over 30 countries worldwide. As a direct manufacturer blessed with autonomous R&D and production capabilities, we offer unparalleled advantages over distributors and intermediaries. These include superior technical expertise, bespoke product customization, and remarkable cost efficiency, ensuring our esteemed clientele always receive the finest solutions tailored to their needs.




After - Sales Service introduction: Experience unwavering dedication with Jinan Nake's outstanding after-sales service, designed to keep your operations seamless and efficient.
1. One year product warranty: Rest assured with our comprehensive one-year product warranty, offering unrivaled peace of mind and confidence in the durability and performance of your investment.
2. Permanent free software updates: Stay at the forefront of innovation with our commitment to providing you with lifetime, complimentary software updates, ensuring your system remains cutting-edge.
3. Permanent maintenance services: Benefit from our ongoing, comprehensive maintenance services, guaranteeing your equipment operates at peak performance for its entire lifespan.
4. Remote video guidance: Enjoy the convenience and expertise of our remote video guidance service, providing you with real-time support and solutions, anytime and anywhere.
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.