Discover the Precision Engineering of the CR-08-4P4-30-D-JA-J Hydraulic Motor from TOKYO KEIKI

TOKYO KEIKI CR-08-4P4-30-D-JA-J Hydraulic Motor

Introduction to TOKYO KEIKI and the CR Series Excellence

TOKYO KEIKI INC., building upon its renowned legacy as TOKIMEC, stands as a pillar of Japanese engineering excellence in the design and manufacture of high-precision hydraulic components. For generations, the company has pioneered robust and efficient fluid power solutions that meet the rigorous demands of global industries. The CR Series of internally engaging gear-type hydraulic motors exemplifies this commitment, specifically engineered to deliver superior low-speed, high-torque (LSHT) performance in the most challenging environments.

The CR-08-4P4-30-D-JA-J model is a distinguished and highly capable variant within this prestigious series. It is designed for applications where uncompromising performance, structural integrity, and specific functional features like external drainage are critical. This motor leverages a sophisticated planetary gear mechanism with a precision cycloid curve, a design philosophy that maximizes power density, ensures operational smoothness, and guarantees an extended service life. This technical overview provides a meticulous examination of the CR-08-4P4-30-D-JA-J, focusing on its superior performance metrics and diverse industrial applications to serve as an authoritative guide for engineers and system designers.

Advanced Engineering and Performance-Oriented Design

The CR-08-4P4-30-D-JA-J is engineered from the ground up for durability and high performance in demanding operational cycles. Its design incorporates several critical features that make it a standout choice for heavy-duty applications.

• High-Capacity Cycloid Gear Mechanism: At the core of this motor is an advanced internally engaging planetary gear system utilizing a precision-engineered cycloid curve. This design ensures exceptionally efficient power transmission with minimal internal friction and mechanical losses. The result is remarkably smooth operation, reduced heat generation, and a significantly extended operational lifespan, even under continuous high-load conditions.

• Robust Construction for Extreme Conditions: Every component is designed for resilience. The high-strength housing and hardened internal gears are built to withstand continuous high-pressure operation, severe shock loads, and repetitive cyclic stresses. The motor's inherent structural integrity makes it exceptionally reliable for use in the most punishing environments, from mining and construction to offshore marine operations.

• External Drainage Capability (D-Type): A key feature of this model, indicated by the "D" in the model number, is the inclusion of an external drain port. This allows for the controlled routing of internal leakage fluid back to the reservoir. This is crucial for applications where high case pressure might otherwise damage seals, or for systems requiring precise control over fluid condition and temperature. It enhances reliability and protects the motor's internal components.

• Optimized Sealing and Fluid Compatibility: The "JA-J" suffix confirms the use of specialized sealing materials and configurations. This ensures superior compatibility with standard petroleum-based hydraulic fluids and provides enhanced resistance to environmental contaminants, thereby mitigating the risk of leaks and internal damage.

Decoding the Model Number: CR-08-4P4-30-D-JA-J

The model number provides a detailed blueprint of the motor's specific configuration:

• CR-08: Denotes the motor series and frame size, characterized by a nominal displacement of 123 cm³/rev, positioning it as a high-torque unit within the mid-range of the CR series.

• 4P4: This suffix specifies the mounting style and port configuration. The "4" indicates a bolt flange mounting, providing a secure and rigid connection to the host machinery. "P4" specifies a particular port type, likely involving flange connections for robust, leak-resistant high-pressure fluid handling.

• 30: This refers to the shaft specification, defining a parallel shaft with a square key (1-1/4 inch), engineered to efficiently transmit high levels of torque.

• D: This denotes the presence of an external drain port (Rc1/8), a critical feature for managing case pressure and enhancing longevity in specific applications.

• JA-J: This code confirms the use of specialized seals and standard spool valves, optimized for reliability and longevity with standard hydraulic oils.

Technical Specifications and Performance Data

The following table consolidates the fundamental technical specifications and performance characteristics for the CR-08-4P4-30-D-JA-J hydraulic motor.

Technical Specifications of CR-08-4P4-30-D-JA-J Hydraulic Motor

• Performance Analysis: With a displacement of 123 cm³/rev, the motor is engineered to deliver substantial torque output, making it ideal for driving heavy loads. Its capability to operate at a rated pressure of 17.5 MPa and handle maximum pressures up to 28 MPa demonstrates its robustness for the most demanding heavy-duty applications. The motor provides optimal power at a rated speed of 400 rpm, perfectly aligning with LSHT requirements for direct drive systems that demand powerful, controlled rotational force without the need for additional gear reduction.

Targeted Industrial Applications and Use Cases

The combination of high torque output, robust flange mounting, and the critical external drain feature makes the CR-08-4P4-30-D-JA-J exceptionally suited for a wide range of severe-duty applications.

• Heavy-Duty Construction and Mining Equipment: This motor is ideal for powering the tracks of medium-sized excavators, the drum drives in winches, and the augers on drilling rigs. Its high torque and durability are essential for earth-moving, material handling, and excavation tasks where reliability is non-negotiable.

• Demanding Industrial Machinery: It serves as a powerful and reliable drive for mixers in chemical processing plants, roller drives in heavy-duty conveyor systems, and various machines in the metal forming and plastics industry where consistent, high-torque rotation is required.

• Marine and Offshore Equipment: The motor's robust construction, effective sealing, and external drain capability make it a premier choice for deck machinery such as winches, windlasses, and capstans. The external drain is particularly valuable in these applications to prevent seal failure from potential case pressure buildup and to handle fluid expansion across varying temperatures.

• Specialized Material Handling: Its performance profile is perfectly matched for heavy-duty forklifts, port cranes, and automated guided vehicles (AGVs) in logistics and shipping terminals, where the efficient and powerful movement of heavy loads is a daily requirement.

Operational Advantages and Key Benefits

1. Exceptional Torque Output: The 123 cm³/rev displacement provides high torque capacity, enabling the direct drive of heavy loads and eliminating the need for costly and complex external gearboxes.

2. Enhanced Reliability with External Drain: The external drain port actively manages internal case pressure, protecting shaft seals and internal components from damage, thereby significantly enhancing the motor's service life and reliability in demanding cycles.

3. Robust Integration and Structural Integrity: The bolt flange mounting (4-type) ensures a secure and rigid connection to the equipment frame, effectively handling the high reaction forces generated by the motor's powerful torque output.

4. High Operational Efficiency: The efficient cycloid gear design minimizes energy losses through friction and internal leakage, leading to lower operating temperatures, reduced overall energy consumption, and improved cost-effectiveness of the entire hydraulic system.

Conclusion

The TOKYO KEIKI CR-08-4P4-30-D-JA-J hydraulic motor is a masterfully engineered component that embodies the highest standards of performance and reliability within the CR Series. Its specific configuration, offering high-torque output, secure flange mounting, and the vital external drain feature, establishes it as a superior and highly adaptable solution for a vast spectrum of the most demanding industrial applications. By integrating this motor, engineers and equipment manufacturers can achieve unparalleled operational reliability, superior performance under load, and durable service in extreme conditions, thereby ensuring the maximum productivity, efficiency, and longevity of their machinery.