Jiangsu Guchuan Machinery Co., Ltd.
| Payment Terms | L/C,T/T |
| Supply Ability | 200 units/month |
| Delivery Time | 15-25 working days |
| Packaging Details | Wooden Box |
| Suitable Weight (ton) | 1.5 – 32 |
| Total Length (mm) | 360-1040 |
| Total Height (mm) | 250-600 |
| Total Width (mm) | 175-540 |
| Pin Distance (mm) | 85-560 |
| Arm Width (mm) | 90-410 |
| Pin Diameter (mm) | 25-90 |
| Working Pressure (kg/cm²) | 40-100 |
| Working Flow (L/min) | 10-20 |
| Weight (kg) | 45-500 |
| Brand Name | SEWOOMIC |
| Model Number | GCB-Mini~17 |
| Certification | ISO,CE |
| Place of Origin | Jiangsu,China |
View Detail Information
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Product Specification
| Payment Terms | L/C,T/T | Supply Ability | 200 units/month |
| Delivery Time | 15-25 working days | Packaging Details | Wooden Box |
| Suitable Weight (ton) | 1.5 – 32 | Total Length (mm) | 360-1040 |
| Total Height (mm) | 250-600 | Total Width (mm) | 175-540 |
| Pin Distance (mm) | 85-560 | Arm Width (mm) | 90-410 |
| Pin Diameter (mm) | 25-90 | Working Pressure (kg/cm²) | 40-100 |
| Working Flow (L/min) | 10-20 | Weight (kg) | 45-500 |
| Brand Name | SEWOOMIC | Model Number | GCB-Mini~17 |
| Certification | ISO,CE | Place of Origin | Jiangsu,China |
In today’s construction and earthmoving industry, efficiency and safety are no longer optional—they are essential. Contractors, equipment rental companies, and project managers are constantly looking for solutions that reduce downtime while ensuring maximum operational safety. One such innovation that has become increasingly popular in global markets is the double safety lock hydraulic quick coupler.
At Guchuan Machinery Co., Ltd., we understand these demands from real-world job sites. Established in 2010 in Changzhou, Jiangsu Province, China, we began as a trusted OEM supplier of excavator attachment components for leading global brands. In 2017, we successfully launched our first self-developed hydraulic breaker, marking a key milestone in our transition to a full-range attachment manufacturer. Today, we provide high-quality excavator attachments to B2B customers worldwide, supported by strong partnerships with OEMs and attachment manufacturers.
A double safety lock quick coupler is an advanced version of the standard hydraulic quick hitch used on excavators. Its primary function is to allow operators to quickly switch between different attachments—such as buckets, breakers, grapples, and rippers—without leaving the cab.
What differentiates it from a standard coupler is the dual locking mechanism, which significantly enhances operational safety. This system ensures that even if one locking component fails or hydraulic pressure is lost, the attachment remains securely connected to the excavator.
This added layer of protection is especially important in high-risk environments such as demolition sites, urban construction zones, and heavy-duty infrastructure projects.
The working principle of a double safety lock coupler combines hydraulic actuation with mechanical redundancy:
· Primary Lock (Hydraulic System):
The hydraulic cylinder controls the locking hook, enabling quick attachment and release.
· Secondary Lock (Mechanical Safety Device):
A backup locking structure prevents accidental detachment, even in case of hydraulic failure.
· Two-Step Operation Requirement:
As shown in the product design, attachment release requires two specific angle movements, ensuring that unintentional release cannot occur during operation.
This dual-layer protection system provides operators and site managers with greater confidence, reducing the risk of accidents and equipment damage.
The entire coupler is manufactured using Q355 high-strength structural steel, ensuring durability, wear resistance, and long service life even under harsh working conditions.
Compared to standard quick couplers, the double safety lock design significantly improves safety performance, making it ideal for projects with strict safety requirements.
Operators can switch attachments quickly without manual intervention, greatly improving jobsite productivity and reducing downtime.
The requirement of two specific operational angles before releasing attachments ensures that accidental disengagement is virtually eliminated.
The coupler is designed to fit a variety of excavator brands and models, making it a flexible solution for contractors and equipment fleets.
Guchuan’s double safety lock quick coupler is suitable for excavators ranging from 3 to 30 tons, covering a wide range of applications from small construction projects to medium-duty operations.
| Model | Suitable Weight (ton) | Total Length (mm) | Total Height (mm) | Total Width (mm) | Pin Distance (mm) | Arm Width (mm) | Pin Diameter (mm) | Working Pressure (kg/cm²) | Working Flow (L/min) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| GCB-Mini | 1.5 – 4 | 360 – 475 | 250 – 300 | 175 – 242 | 85 – 200 | 90 – 150 | 25 – 40 | 40 – 100 | 10 – 20 | 45 |
| GCB-02 | 5 – 6 | 534 – 545 | 307 | 258 – 263 | 220 – 270 | 155 – 170 | 45 – 50 | 40 – 100 | 10 – 20 | 70 |
| GCB-04 | 7 – 9 | 600 | 320 | 270 – 350 | 290 – 360 | 180 – 230 | 50 – 55 | 40 – 100 | 10 – 20 | 100 |
| GCB-06 | 12 – 18 | 820 | 410 | 365 – 436 | 360 – 420 | 220 – 315 | 60 – 70 | 40 – 100 | 10 – 20 | 180 |
| GCB-08 | 19 – 24 | 944 – 990 | 520 | 449 – 483 | 430 – 520 | 300 – 350 | 70 – 80 | 40 – 100 | 10 – 20 | 350 |
| GCB-10 | 26 – 32 | 1040 | 600 | 480 – 540 | 450 – 560 | 350 – 410 | 90 | 40 – 100 | 10 – 20 | 550 |
These specifications ensure stable hydraulic performance and compatibility with most standard excavator hydraulic systems.
The double safety lock quick coupler is widely used across multiple industries:
Quickly switch between buckets and breakers for excavation and foundation work.
Enhanced safety locking is critical when handling heavy demolition attachments.
Efficient tool changes improve productivity in road repair and utility installation.
Ideal for urban environments where safety standards are stricter.
A versatile solution that allows one excavator to serve multiple purposes, increasing equipment utilization.
From a buyer’s perspective, the decision often comes down to risk vs. efficiency. While standard quick couplers offer speed, they may not always meet the highest safety expectations.
The double safety lock system provides:
· Reduced accident risk
· Improved compliance with safety regulations
· Greater operator confidence
· Lower long-term maintenance and liability costs
For contractors working on high-value or high-risk projects, this added safety is not just a feature—it is a necessity.
Guchuan Machinery is more than just a manufacturer—we are a reliable B2B partner in the global construction equipment industry.
· Over 10 years of manufacturing experience
· Strong OEM/ODM capability
· Proven cooperation with international brands
· Strict quality control standards
· Competitive pricing for global markets
We combine engineering expertise with real-world application knowledge to deliver products that meet both performance and commercial expectations.
The double safety lock hydraulic quick coupler is an essential upgrade for modern excavator operations. By combining fast attachment changes with enhanced safety protection, it helps contractors achieve higher productivity while minimizing operational risks.
Guchuan’s solution, built with Q355 steel and designed for 3–30 ton excavators, offers the perfect balance between durability, efficiency, and safety. Whether you are a contractor, distributor, or OEM partner, investing in a reliable quick coupler is a smart step toward improving your equipment performance and jobsite safety.
Q1: What makes a double safety lock coupler safer than a standard one?
It uses both hydraulic and mechanical locking systems to prevent accidental attachment release.
Q2: What excavator sizes are supported?
It is suitable for excavators from 3 to 30 tons.
Q3: Is it compatible with different attachment types?
Yes, it works with buckets, breakers, grapples, rippers, and more.
Q4: Is installation complicated?
No, it is designed for easy installation and integration with standard excavator systems.
Company Details
Business Type:
Manufacturer
Year Established:
2011
Employee Number:
>180
Ecer Certification：
Verified Supplier
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