New Coupling 120A for Main Hydraulic Pump Coupling ASSY DD80 8000142 8000077

Product Description:

Packaging & Delivery :

Product show as below:

Contact details

YINGFENG CONSTRUCTION MACHINERY LIMTED

Guangzhou XIEBAGN MACHINERY CO., LIMTED

specialized in:

couplings, rubber mounts, gera parts, hydraulic seals and seal kits for hydraulic hammers, rock breakers, hydraulic excavators,wheel loaders, and JCB badkhoe loaders.

And, Our company also supply:

Engine parts, hydraulic piston pump and hydraulic travel motor, Swing motor assembly and hydraulic component parts, electric parts, etc. Hydraulic hammer breaker parts with piston, cylinder, chisel, through bolt, side bolt, top bush, front head bushing,accumlator, valve, etc.

We always try our best for all our customers and make it better and better. Welcome!

Coupling information:

The main functions of the coupling are:
Connect the drive shaft of a motor, etc., and the driven shaft, such as a ball screw, to transmit power.
The installation error of the shaft center of the drive shaft and the driven shaft is allowable.
Absorbs the shock and vibration of the device.
Improve device performance.
1. Connect drive shaft and driven shaft, transmit power
The biggest function of the coupling is to connect a drive shaft such as a motor and a driven shaft such as a ball screw, and transmit the power of the motor to the driven shaft.
There are many ways to connect with the shaft, such as the "fixed set screw type" that directly presses the screw on the shaft, the "clamping type" that uses frictional force to connect, and the "expansion sleeve type" that uses the wedge effect.
2. The installation error of the shaft center of the drive shaft and the driven shaft is allowable.
The misalignment of the drive shaft and the driven shaft is called error. There are three types of errors: eccentricity, declination, and axial deviation (axis direction deviation). These may cause vibration, noise, uneven bearing wear and other causes of device failure, so they should be minimized as much as possible.
However, it is very difficult to control the error adjustment to zero when assembling the device.
Couplings have the function of allowing tolerance adjustments that cannot be fully adjusted during assembly.
3. Absorbs the shock and vibration of the device.
Elastomers, etc. are embedded in the plum-shaped coupling as an intermediate part, and it is a coupling that can absorb shock and vibration.
4. Improve the performance of the device.
Depending on the type of coupling, in addition to the functions mentioned above, some can also improve the performance of the device.

Your Trusted Excavator Parts Supplier – Manufacturer & One-Stop Sourcing Solution

Looking for a reliable supplier of excavator parts? Whether you need OEM services or a complete range of parts, we provide the best solutions for your business. As both a manufacturer and trading company, we combine factory-direct prices with the convenience of one-stop sourcing, ensuring that you get high-quality parts at competitive prices.

At YNF Machinery, we specialize in excavator rubber parts and a wide range of excavator components. Our extensive experience and commitment to quality make us a trusted partner for distributors, wholesalers, and repair shops worldwide.

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✅ Largest Excavator Rubber Parts Factory in Southern China

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We cover all major excavator brands, including Caterpillar, Komatsu, Hitachi, Volvo, Kobelco, Doosan, Hyundai, JCB, Kubota, and more. Our product range is designed to keep your machines running efficiently and reduce downtime.