Concrete Mixer Hydraulic Speed Reducer, 7.1r120cp Reducer Construction Machinery Spare Parts

• Customization: Available
• Application: Motor, Electric Cars, Motorcycle, Machinery, Car
• Hardness: Hardened Tooth Surface
• Model NO.: 7.1R120CP
• Installation: 90 Degree
• Layout: Coaxial
• Gear Shape: Conical - Cylindrical Gear
• Step: Double-Step
• Type: Planetary Gear Reducer
• Transport Package: Wooden Box
• Specification: 56*56*68
• Trademark: Bodeke
• Origin: China
• HS Code: 8483402000
• Production Capacity: 300/Month

Product Description

Revolutionizing Concrete Mixing: The All - New PMP 7.1R120CP Speed Reducer

 

In the bustling world of construction, where efficiency and reliability are non - negotiable, the PMP 7.1R120CP speed reducer for concrete mixer trucks emerges as a game - changing innovation. This state - of - the - art component is engineered to perfection, addressing the most demanding requirements of the concrete transportation and mixing process.

Design Marvel

Housing: Fortress of Durability

 

The housing of the PMP 7.1R120CP is a masterpiece of design and engineering. Constructed from high - grade, specialized alloy - enhanced cast iron, it offers unparalleled strength. This material choice not only withstands the immense mechanical stresses generated during operation but also provides excellent resistance against corrosion, a common threat in the harsh construction environment. The housing's walls are meticulously thickened in critical areas to handle the substantial forces exerted by the gears and shafts within.

 

The surface of the housing is treated with a multi - layer anti - wear coating. This coating not only further protects against abrasion from dust and debris but also reduces friction, enhancing the overall efficiency of the speed reducer. Precision - machined mounting points ensure a seamless and secure installation on the concrete mixer truck chassis, minimizing vibrations and ensuring stable operation.

Gearing System: Precision in Motion

 

1. Input Shaft and Pinion Gear
   The input shaft, forged from high - tensile alloy steel, is designed to transfer power from the truck's engine (usually via a hydraulic motor) with maximum efficiency. It rotates at high speeds, making it crucial to have a pinion gear that can keep up. The pinion gear, a marvel of precision engineering, features teeth with a unique, optimized involute profile. This profile is carefully calculated to ensure smooth meshing with the intermediate gear, reducing noise and vibration to a minimum.

 

The pinion gear is heat - treated using an advanced quenching and tempering process. This treatment not only hardens the surface of the gear to resist wear but also retains the inner core's toughness, allowing it to withstand sudden shock loads. To further enhance its performance, the teeth are coated with a diamond - like carbon (DLC) layer. This ultra - thin, yet extremely hard coating reduces friction and increases the gear's lifespan significantly.
2. Intermediate and Output Gears
The intermediate gears in the PMP 7.1R120CP form a complex yet highly efficient transmission network. Made from the same high - quality alloy steel as the input shaft and pinion gear, they are designed with specific tooth counts and diameters to achieve the desired speed reduction ratio. Each intermediate gear is precisely machined and ground to ensure perfect meshing with adjacent gears.

 

The output gear, the largest and most critical in the system, is directly connected to the concrete mixer drum. It is engineered to withstand the massive torque required to rotate the drum, even when it is filled to capacity with heavy concrete. The output gear's teeth are wider and thicker compared to the other gears, providing increased contact area and strength. A special case - hardening process is applied to the output gear, creating a hard outer layer that can resist wear and fatigue, while the inner core remains ductile for added toughness.
3. Gear Ratio: Tailored for Optimal Performance
The gear ratio of the PMP 7.1R120CP is a result of extensive research and testing. With a typical ratio of [X:1], it is optimized to meet the specific needs of concrete mixer trucks. This ratio ensures that the mixer drum rotates at a speed that promotes thorough mixing of the concrete ingredients without causing segregation. When mixing high - viscosity concrete, the lower rotational speed provided by the speed reducer, combined with the increased torque, allows for effective blending.

 

The gear ratio is also designed to adapt to different operating conditions. Whether the truck is moving on smooth highways or navigating rough, off - road terrains, the speed reducer can maintain a consistent output speed to the mixer drum. This adaptability is crucial for ensuring that the quality of the concrete remains high throughout the transportation process.

Bearings and Seals: Guardians of Smooth Operation

 

1. Bearings
   High - performance bearings are the unsung heroes of the PMP 7.1R120CP speed reducer. Radial ball bearings are used to support the shafts and handle the radial loads generated by the meshing gears. These bearings are made from premium - grade bearing steel, which offers exceptional hardness and wear resistance. The balls within the bearings are precision - ground to minimize friction and ensure smooth rotation.

 

Thrust bearings are also incorporated to handle the axial loads that occur during operation. These thrust bearings are designed with a unique cage structure that allows for efficient distribution of the axial forces. To further reduce friction and extend the lifespan of the bearings, they are lubricated with a high - performance synthetic grease. This grease is formulated to withstand high temperatures and heavy loads, ensuring reliable operation even in the most demanding conditions.
2. Seals
The seals in the PMP 7.1R120CP are of utmost importance in maintaining the integrity of the internal components. Lip seals, made from high - quality nitrile rubber, are used at the shaft - housing interfaces. These seals feature a specially designed lip profile that provides a tight seal against lubricant leakage. The lip is also flexible enough to adapt to minor shaft movements and vibrations, ensuring a long - lasting and effective seal.

 

In addition to lip seals, there are static seals, such as O - rings, placed in critical areas to prevent any potential leakage. These O - rings are made from a fluorocarbon material that offers excellent chemical resistance, ensuring they can withstand the harsh environment of a concrete mixer truck. The seals not only prevent lubricant loss but also keep out dust, dirt, and moisture, protecting the gears and bearings from contamination.

Working Principle: A Symphony of Mechanics

 

The working principle of the PMP 7.1R120CP is based on the fundamental concept of gear - based speed reduction. When power is supplied to the input shaft, the high - speed rotation of the shaft causes the pinion gear to engage with the first intermediate gear. As the gears mesh, the rotational motion is transferred, and due to the difference in the number of teeth between the pinion and the intermediate gear, the speed of rotation is reduced.

 

This process is repeated through multiple stages of intermediate gears, with each stage further reducing the rotational speed and increasing the torque. The multi - stage gearing system acts like a series of steps, gradually transforming the high - speed, low - torque input from the engine into a low - speed, high - torque output for the mixer drum. The output gear, with its large diameter and carefully designed tooth profile, provides the final reduction in speed and the necessary torque to rotate the concrete mixer drum.

 

The speed reducer also incorporates a built - in torque - sensing mechanism. This mechanism monitors the torque being transmitted through the gears and adjusts the speed reduction ratio slightly in real - time if it detects any abnormal loads. For example, if the mixer drum encounters a particularly thick batch of concrete or if the truck is driving on a steep incline, the torque - sensing mechanism can increase the torque output to ensure smooth operation.

Model NO.	7.1R120CP	Model	7.1R120CP
Lead Time	5 Days	Transport Package	Standard Export Wooden Case
Colour	as Your Request	Usage	Concrete Mixer
Weight	330KG	Specification	56*56*68
Trademark	Bodeke	Origin	China
HS Code	8483402000	Production Capacity	100 Sets/Month

Technical data of Camray CMR conrete mixer gearbox
Model	6.5R120CP	7.1R120CP
Max.Output Torque Nm	65,000	65,000
Ratio l=	1:120	1:120
Max.installation angle of Drum	12°	12°
Max.Input speed rpm	2500	2500
Max.Output speed rpm	18	18
Max.Capacity of Drum   m³	8~12	8~12
Weight(without oil)    KG	320	320

FAQ
Questions you maybe inquiry

Q1.What's the application for Reducer?
Construction equipment Steel factory or Power plant Industrial equipment Related hydraulic system

Q2.What about the MOQ?
MOQ:1~300 pcs.

Q3.Are you manufacturer?  And what's the delivery time?
Yes, we are manufacturer and have our own factory. Generally, its in stock for common models, 25-30 days will be finished and sent to customer in time.

Q4.If we don't find what we want on your website, what should we do?
A: You can email us the descriptions and pictures of the products you need, We will check whether we can make it.

Q5.How about the inspection and Guarantee of products?
We promise: all products are tested before ship, to confirm it will be working and  in good conditions when customers get. Also, we offer 12-month guarantee, if it doesn't work due to quality issue in the period, we will send spares to repair for free.

Q6. What about your after-sale service?
If there is any question in use, please talk with your sales manager at any time, so we will know your problems are and help to solve.

Bodeke Industrial Components Co., Ltd. is a leading Chinese company specializing in the manufacturing and maintenance of a wide range of industrial equipment components. Our products find application in diverse sectors, including cement tanker trucks, excavators, rescue equipment for cement trucks, mixers, cranes, hydraulic motors, hydraulic pumps, and other industrial machinery.

Empower your industrial machinery with Bodeke - a leading Chinese manufacturer specializing in the repair and production of a wide range of equipment components.From cement tanker trucks and excavators to mixer trucks,cranes,hydraulic motors,and pumps,our precision-engineered products redefine reliability and performance.Elevate your operations with Bodeke's quality components-your trusted partner in global industrial excellence.
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P3301 reducer / gearbox	PMP8.0R140 reducer / gearbox	6423-279 pump	6433  motor
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P7300 reducer / gearbox	PMP7.5R135 reducer / gearbox	SPV22 pump	SMF22  motor
PLM-7 reducer / gearbox	PMP7.5R136 reducer / gearbox	SPV23 pump	SMF23 motor
PLM-9 reducer / gearbox	PMP6sp reducer / gearbox	PV070 pump	MF070  motor
CML-10 reducer / gearbox	PMP 6.5sp reducer / gearbox	PV089 pump	MF089 motor
CML-12 reducer / gearbox	PMP 7.1sp reducer / gearbox	SPV070 pump	SMF070  motor
CML16 reducer / gearbox	PMP 7.5sp reducer / gearbox	SPV089 pump	SMF089 motor
P3301 reducer / gearbox	PMP 6cp reducer / gearbox	PV110 pump	MF110 motor
P4300 reducer / gearbox	PMP 6.5cp reducer / gearbox	SPV110 pump	SMF110 motor
P5300 reducer / gearbox	PMP 7.1cp reducer / gearbox	PV112 pump	MF112 motor
P7300 reducer / gearbox	PMP 7.5cp reducer / gearbox	SPV112 pump	SMF112 motor
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PMB6R100 reducer / gearbox	577L reducer / gearbox	SPV090 pump	SMF090 motor
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PMB7aspR120 reducer / gearbox	575S3W reducer / gearbox	A4VTG90 pump	TMM089 motor
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PMB7.5R130 reducer / gearbox	PM71.2 reducer / gearbox	PMP P90 pump	90M100 motor
PMB7.8R140 reducer / gearbox	TMG51.2 reducer / gearbox	PMH P110 pump	MSF85 motor
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PMP6R100 reducer / gearbox	TOP P75R reducer / gearbox	A11VLO260LRDU2/11R-NZD12K67P-S PISTON pump	ZHP P70 reducer / gearbox
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ZTS P68 reducer / gearbox	ZHP P75S reducer / gearbox	A4VG180HD1MT1/32R-NSF02F021-S PISTON pump	8708919000
ZTS P70 reducer / gearbox	DD33-MF reducer / gearbox	A7VO55LRDS/63L-NZB01-S PISTON pump	8483402000
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