1. Main Purpose and Features
The NKYS-500 Portable Rock Direct Shear Machine (Multi-functional portable tester for rock and soil mechanical properties) is meticulously crafted in accordance with stringent national standards SL264 (Specifications for Rock Tests in Hydraulic and Hydropower Engineering) and JTG E41 (Specifications for Highway Engineering Rock Tests). Utilizing the innovative horizontal push method, it excels in conducting direct shear tests on rock blocks, structural planes (such as joints, bedding planes, foliation, or cleavage surfaces), and contact surfaces between concrete (or mortar) and rock. It is also adept for shear strength testing between concrete and other materials.
Standard:
ASTM D5607-16 Standard Test Method for Performing Laboratory Direct Shear Strength Tests of Rock Specimens Under Constant Normal Force
ISO 12957-1:2005 Geosynthetics - Determination of friction characteristics - Part 1: Direct shear test
ISO/TS 17892-10:2018 Geotechnical investigation and testing - Laboratory testing of soil - Part 10: Direct shear tests
ISRM Suggested Method for Determining Shear Strength International Society for Rock Mechanics, 2007 Edition
GB/T 50218-2014 Code for Testing of Soil and Rock in Geotechnical Engineering
GB/T 23561.14-2009 Methods for Physical and Mechanical Properties of Coal and Rock Part 14: Direct Shear Test
SL 264-2001 Specifications for Rock Tests in Hydraulic and Hydropower Engineering
JTG E41-2005 Specifications for Highway Engineering Rock Tests
By changing fixtures, this versatile machine can perform the following tests:
- Rock deformation test
- Uniaxial compressive strength test
- Tensile strength test
- Point load strength test (for small/mid-sized cores and irregular specimens; testable compressive strength range: 5 MPa (soft rock) to any hard rock)
- Direct shear test on intact rock specimens (compatible with small/mid-size drill cores or 50×50 mm square columns)
- Direct shear test on structural planes and weak rock (irregular samples)
- Direct shear test on soil (including undisturbed core samples with larger shear areas than ring cutters)
- Conduct precise direct shear tests on naturally occurring or saturated gravelly soil featuring particles no larger than 2.0 cm, ensuring robust data for your geological assessments.
This machine is expertly designed with a compact structure, exquisite machining craftsmanship, a petite form factor, lightweight engineering, effortless assembly, remarkable field portability, straightforward operation, accelerated test cycles,and cost-effective performance. This makes it the perfect companion for conducting field tests by engineering geology teams, testing agencies, academic institutions, and research centers.
2. Applications
Versatile for both field and laboratory environments, this machine excels in performing the following test types:
- Assessing rock deformation,
- executing uniaxial compression tests,
- measuring tensile (splitting) strength,
- evaluating point load strength,
- conducting direct shear tests on intact or irregular rock surfaces,
- performing direct shear tests on structural planes and weak rock formations,
- and analyzing shear strength in soil and gravelly soil.
3. Technical Specifications
Item |
Specification |
Overall dimensions |
770 mm (L) × 430 mm (W) × 670 mm (H) |
Total weight |
300 kg (incl. 2 hand pumps and accessories) |
Vertical jack |
Max force: 500 kN (50 tons), stroke: 60 mm |
Horizontal jack |
Max force: 500 kN (50 tons), stroke: 60 mm |
Sample sizes: |
|
- Rock deformation & compression |
Ø50-56 mm or 50×50 mm; Height: 100-112 mm |
- Tensile test |
Ø50-56 mm; Height: 50-56 mm |
- Point load strength |
40-60 mm in L/W/H; six faces as parallel as possible |
- Direct shear (intact rock) |
Ø50, 56, 71.5, 90 mm cylinders; 50×50 mm square prism |
- Structural plane/weak rock |
L ≤ 160 mm, W ≤ 140 mm, H ≤ 160 mm |
- Soil direct shear |
Ø90 mm, Height: 30 mm |
- Gravelly soil shear test |
Gravel ≤ 2.0 cm; Shear box: 160×140×160 mm (V=35 cm³) |

As an industry pioneer and esteemed leader in testing equipment manufacturing, Jinan Nake Test Equipment Co., Ltd. boasts over two decades of unparalleled expertise. With our flagship NAKE Group, we are backed by a robust team of more than 20 visionary R&D specialists, over 50 adept production experts, and a professional after-sales service squad exceeding 10 dedicated members. Our cutting-edge facilities, sprawling across 4,000 square meters, are testament to our commitment to innovation and excellence. Proudly holding the prestigious title of a National High-Tech Enterprise in China, our enterprise is dedicated to setting benchmarks in the industry.
With our ISO 9001:2015-certified quality management system, every facet of production is meticulously managed to ensure exceptional precision and quality. Annually sourcing around 5,000 tons of premium raw materials and maintaining comprehensive in-house machining and assembly proficiencies, we secure a remarkable 3% manufacturing cost advantage over our competitors, all while delivering impeccable product consistency and excellence.
In the past five years, our steadfast commitment to precision and quality has resulted in a remarkable on-time shipment rate surpassing 98.2%, an impressively low product failure rate below 0.3%, and a rework rate under 0.28%. This steadfast dedication to excellence reinforces our role as leaders in precision engineering. Additionally, by providing OEM manufacturing services to over 20 esteemed Chinese exporters, we produce approximately 600 units of advanced mechanical testing equipment annually, further solidifying our position as an industry trailblazer.
Our brand, NAKE Test Equipment, possesses a distinguished reputation throughout China and beyond, with our innovative products reaching over 30 countries globally. As a direct manufacturer enriched with independent R&D and production prowess, we present significant advantages over distributors and intermediaries. Our expertise spans technical know-how, bespoke product customization, and unparalleled cost efficiency, positioning us as the preferred choice for advanced testing solutions.




After-Sales Service Introduction:
1. Enjoy peace of mind with our comprehensive one-year product warranty, ensuring your investment is protected against any unforeseen issues.
2. Benefit from perpetual access to the latest software advancements with permanent free updates, keeping your equipment at the cutting edge of technology.
3. Experience ongoing support with our commitment to permanent maintenance services, ensuring your machine operates at peak performance over its lifetime.
4. Access expert assistance anytime, anywhere with our convenient remote video guidance, empowering you to resolve inquiries efficiently and effectively.
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.