During the construction with excavators, it is common to frequently replace attachments, such as buckets, impact hammers, wood-grabbers, etc.The traditional replacement method requires two people to cooperate, remove the pins, and align the holes, which is time-consuming and labor-intensive. However, the emergence of quick couplers has made attachment replacement as simple as “changing a lens”: within 30 seconds, the driver can complete it alone. This article will guide you to quickly understand how to select a suitable METDEEM quick coupler for your excavator.
What is a quick coupler? Why is it a necessary accessory?
The quick coupler is installed at the front end of the excavator’s boom. It is a versatile and essential device for quickly replacing the front attachments. After installation, when changing the attachments, there is no need to disassemble or assemble the connecting pin. The quick-change cylinder’s extension and retraction control the “claws” at both ends to grip or release the pin, enabling a quick switch.
Core value:
- Time-saving: The process of changing attachments has been shortened from 30 minutes to 30 seconds.
- Effort-saving: One person can operate inside the cab without getting off the machine.
- Cost-saving: A single excavator can quickly switch between various functions, reducing equipment idleness.
Two major categories of METDEEM quick coupler
The METDEEM quick couplers are classified based on two aspects: manufacturing process and operation method. Users can make flexible choices according to the working conditions and budget.
- According to manufacturing process: Cast integrated type vs Welded type
| Process type | Manufacturing method | Core advantage | Applicable suggestions |
| Casting integrated type | High-strength steel is cast as a one-piece structure, and the mold directly casts the shape without any welding points. | Overall formed, not prone to cracking, good wear resistance, and low cost | Popular choice in the market, suitable for the majority of users |
| Welding type | High-strength manganese steel is cut, welded and assembled to form the product. | High strength, strong customization capability | Suitable for special sizes or non-standard equipment requirements |
- By operation mode: Mechanical type vs Hydraulic type
| Operation type | Working principle | Advantages | Notes for Attention |
| Mechanical type | The driver manually operates the quick-change cylinder (via a manual valve) | Simple structure, low cost, easy maintenance | Requires manual control and is a bit laborious. |
| Hydraulic type | Install hydraulic pipelines and utilize the hydraulic system of the excavator. Control the buttons in the driver’s cabin. | One-click operation, effortless and efficient, safer | The installation package comes with its own piping system, but the cost is slightly higher. |
Suggestion: For users with a large budget or those who frequently replace appliances, it is recommended to choose the hydraulic type, as it offers significant efficiency improvements.
How to Select the Appropriate quick coupler for Your Excavator
When choosing a fast connector, please pay close attention to the following three matches:
- Tonnage Compatibility
The METDEEM quick couplers are compatible with excavators ranging from 0.8 tons to 50 tons. Different tonnage ranges correspond to different models (such as DM06, DM35, DM68, DM140, DM175, DM190, etc.). Please provide the excavator model and we will precisely match it for you.
- Compatibility of Attachments
Ensure that the “mouth” size of the quick coupler is consistent with the pin spacing of your existing attachments. METDEEM is customizable and can be adapted to various attachments such as breaker hammers, buckets, wood grabbers, soil loosers, and vibratory compactors.
- Budget and Operation Frequency
Occasional replacement of tools: Economical solution
Mechanical type + Welding type
Frequent replacement of tools :Efficient and durable solution
Hydraulic type + Cast-Integrated type
Chart: METDEEM Fast Connector Selection Quick Reference Table
| Excavator tonnage | Recommended Model | Axis diameter reference/mm | Recommended operating method | quick couplerCore Features | Adaptive accessories |
| 0.8T-1.7T | MINI | 25~30 | mechanical | quick couplerLightweight and flexible microstructurequick coupler | Micro excavator bucket, small breaking hammer |
| 2T-4T | MD01 | 25×30 | Mechanical/Hydraulicquick coupler | Compact structure, high cost-effectiveness | Digging bucket, small breaking hammer, wood grabbing tool |
| 5T-7T | MD02 | 22×15×110 | Mechanical/Hydraulicquick coupler | Lightweight, no loss of digging power | Standard digging bucket, crushing hammer |
| 7T-9T | MD04 | 45 | Mechanical/Hydraulic | quick couplerDouble safety lock with good wear resistancequick coupler | Rock bucket, medium breaking hammer |
| 10T-18T | MD06 | 60~65 | Mechanical/Hydraulic | quick couplerZero shaking design to protect the pin shaftquick coupler | Crushing hammer, grabbing tool, crushing pliers |
| 20T-25T | MD08 | 70~80 | hydraulic | quick couplerStrengthening the fatigue resistance of reinforced structuresquick coupler | Large breaking hammer, hydraulic shear |
| 25T-30T | MD09/MD10 | 90×325 /90×345 / 100 | hydraulic | quick couplerHeavy duty design, ultra long lifespanquick coupler | Powerful shears and pile drivers |
| 30T-35T | MD14 | 100 /110 | hydraulic | quick couplerHigh strength steel, suitable for harsh working conditions | Overweight crushing hammer, crushing pliers |
| 38T-40T | MD17 | 100 /110 | hydraulic | Specially designed for ultra large tonnage, structurally reinforced | Giant hydraulic shears and pile drivers |
| 45T-50T | MD20 | 100 /110/120 | hydraulic | quick couplerMine grade heavy-duty impact resistancequick coupler | Ultra large crushing hammer and steel gripper |
Note:
In the table, “axle diameter” refers to the diameter range of the connecting shaft between the quick connector and the accessory (unit: mm). For specific matching, please refer to the actual measurement. It is used to adapt to the different brand excavator’s shaft sizes.
All models of METDEEM offer a 12-month extended warranty, ensuring reliable quality and peace of mind when using.
Operation mode selection:
For loads under 20 tons: You can choose either mechanical type (lower cost) or hydraulic type (more convenient).
For loads over 20 tons: We strongly recommend the hydraulic type. The driver doesn’t need to disembark from the machine. The equipment can be switched in one click within 30 seconds, significantly improving efficiency.
Shaft diameter confirmation: Before installation, please measure the diameter of the existing equipment pin shaft and compare it with the range in the table to ensure a match. If there are non-standard requirements, METDEEM can provide customization.
Why choose METDEEM quick couplers
Dual safety design: hydraulic lock + mechanical lock, preventing accidental disengagement
- Surface hardening treatment: carburizing and quenching, increasing wear resistance by 300%
- Zero vibration design: eliminating the swinging of tools during operation, reducing bearing wear by 40%
- Wide compatibility: compatible with all major brands such as Caterpillar, Sany, Liebherr, XCMG, Hitachi, and Komatsu
- 12-month warranty: no worries about after-sales service
Conclusion
The quick coupler is the cornerstone for excavators to achieve “multi-purpose in one machine”. METDEEM offers various options such as cast-assembly type, welded type, mechanical type, and hydraulic type, covering a full range of excavators from 0.8 to 50 tons. This enables you to obtain an efficient and safe quick-change experience for attachments at a reasonable budget.
Enable the rapid connector to give your excavator the versatile wings it needs. METDEEM is looking forward to cooperating with you! Contact us today!
FAQ
Q: Does installing the quick coupler require modifying the hydraulic system of the excavator?
A: For mechanical type, no modification is needed; for hydraulic type, a set of hydraulic pipelines needs to be added (included in the installation package), and the installation can generally be completed by a repair shop without requiring any structural modification to the original vehicle.
Q: Will the quick coupler accidentally disengage during use?
A: No. The METDEEM fast connector uses a combination of hydraulically locking and mechanically safety design. Even when the hydraulic pipe pressure is lost, the mechanical locking pin stays in its locked position. After conducting tests in thousands, the chance of accidental unlocking is greatly reduced.
Q: I have a 15-ton Caterpillar excavator and I want to equip it with a hydraulic quick coupler. Which model should I choose?
A: Recommendation is made to go for the DM06 cast assembly hydraulic quick coupler. The product will work great for the Caterpillar model that weighs 15 tons. It allows fast attachment changes of breakers and buckets. We need the model number from you so that we can verify the pin size.
