TOKYO KEIKI CR Series Hydraulic MotorS CR-09-4S4-30-JA Unmatched Performance and Versatility for Demanding Industrial Machinery

TOKYO KEIKI CR-09-4S4-30-JA Hydraulic Motor - A Comparative Study Within the CR Series

Introduction to TOKYO KEIKI's CR Series Portfolio

TOKYO KEIKI INC., maintaining its prestigious legacy as TOKIMEC, has established an unparalleled reputation in the design and manufacture of high-performance hydraulic components. The CR Series of internally engaging gear-type hydraulic motors represents the culmination of decades of engineering innovation, offering a comprehensive range of low-speed, high-torque solutions for diverse industrial applications. The CR-09-4S4-30-JA model occupies a distinctive position within this series, incorporating specialized features that differentiate it from both smaller and larger displacement variants while offering unique advantages for specific application requirements.

This technical analysis provides a detailed comparative examination of the CR-09-4S4-30-JA within the context of the broader CR Series portfolio. By understanding the nuanced differences between models, engineers and specification professionals can make more informed decisions when selecting hydraulic motors for their specific applications, optimizing both performance and cost-effectiveness.

CR Series Design Philosophy and Platform Strategy

TOKYO KEIKI's CR Series demonstrates a coherent design philosophy centered around a modular platform approach. All motors within the series share the fundamental planetary gear mechanism with precision cycloidal curves, ensuring high torque transmission efficiency and operational smoothness across the entire product range. However, strategic variations in displacement, pressure ratings, mounting options, and special features create a diversified product family capable of addressing a wide spectrum of industrial requirements.

The CR-09-4S4-30-JA embodies a balanced approach within this strategy, offering medium displacement with specialized features that distinguish it from both entry-level and premium models in the series. Its specific configuration makes it particularly suitable for applications requiring smooth operation and reliable performance without the need for external drainage systems.

Comparative Technical Specifications Within CR Series

Displacement and Performance Differentiation

Within the CR Series hierarchy, the CR-09-4S4-30-JA occupies a strategic position with its 153 cm³/rev displacement. This places it between the smaller CR-07 (106 cm³/rev) and CR-08 (123 cm³/rev) models and before the larger CR-10 (184 cm³/rev) and above variants. This intermediate displacement provides an optimal balance between physical size and torque output, making it suitable for applications requiring substantial power without the bulk associated with higher-displacement models.

When compared to the CR-07 series, the CR-09-4S4-30-JA offers approximately 44% greater displacement, translating to significantly higher torque output at equivalent operating pressures. However, this comes with a corresponding reduction in maximum rated speed (350 min⁻¹ versus 465 min⁻¹), illustrating the fundamental torque-speed tradeoff inherent in hydraulic motor design. Against the CR-08 series, the torque advantage is more modest but still meaningful for applications operating near the upper performance limits of the smaller motor.

Specialized Feature Comparison: Low-Pulsation Technology

The most distinctive feature of the CR-09-4S4-30-JA, denoted by the "S" designation in its model number, is its incorporation of a low-pulsation spool. This specialized component significantly reduces pressure fluctuations within the hydraulic system, resulting in smoother operation and diminished vibration transmission to connected equipment.

This feature differentiates the CR-09-4S4-30-JA from most standard CR Series models, which utilize conventional spool designs. The low-pulsation characteristic provides particular benefits in applications requiring precise motion control, sensitive load handling, or operation in noise-restricted environments. Compared to standard models, this motor demonstrates superior performance in applications such as:

• Precision manufacturing equipment

• Medical device manufacturing machinery

• Laboratory testing apparatus

• Noise-sensitive urban equipment

• Vibration-critical instrumentation platforms

Mounting and Configuration Compatibility

The CR-09-4S4-30-JA utilizes the versatile 4-type bolt flange mounting system, which provides secure attachment and effective management of reaction torques. This mounting configuration is consistent across multiple models within the CR Series, facilitating interchangeability and simplifying equipment design for manufacturers producing multiple product lines with different performance requirements.

The square key parallel shaft (1") configuration follows the standardization approach throughout the series, ensuring compatibility with a wide range of driven equipment without requiring special adapters or modifications. This consistency across the product family allows equipment manufacturers to maintain common interface designs while selecting the appropriate motor displacement and features for each specific application.

Application-Based Model Selection Guidelines

Understanding the comparative advantages of the CR-09-4S4-30-JA within the CR Series enables more precise model selection for specific applications:

• For compact equipment with space constraints: The CR-07 series offers higher speed capabilities in a more compact package, though with lower torque output.

• For standard industrial applications with balanced requirements: The CR-08 series provides intermediate torque with conventional operation characteristics.

• For applications requiring smooth operation and reduced vibration: The CR-09-4S4-30-JA delivers its specialized low-pulsation performance with substantial torque capacity.

• For maximum torque output in size-constrained applications: Higher displacement models like CR-10 and above offer greater power density but with lower speed capabilities.

The absence of external drainage in the CR-09-4S4-30-JA (indicated by the lack of "D" suffix) distinguishes it from models equipped with this feature, simplifying installation in applications where case pressure management is less critical or can be addressed through alternative system design approaches.

Performance Characteristics in Context

When evaluated within the series context, the CR-09-4S4-30-JA demonstrates a well-balanced performance profile. Its torque characteristics substantially exceed those of smaller-displacement models while maintaining higher operational speeds than larger alternatives. The integration of low-pulsation technology further enhances its value proposition for specific application segments where operational smoothness transcends raw power as the primary selection criterion.

The motor's pressure ratings align with the robust standards established throughout the CR Series, ensuring reliable operation under demanding conditions. The 28 MPa maximum pressure rating matches that of several other series models, providing consistent overload protection across the product family.

Conclusion: Strategic Positioning within the CR Series

The TOKYO KEIKI CR-09-4S4-30-JA hydraulic motor represents a strategically positioned offering within the comprehensive CR Series portfolio. Its intermediate displacement, combined with specialized low-pulsation technology, creates a unique value proposition that differentiates it from both smaller and larger alternatives in the series. This comparative analysis demonstrates how thoughtful model selection within the coordinated CR Series family enables engineers to precisely match motor characteristics to application requirements, optimizing both performance and cost-effectiveness.

Through its balanced technical specifications and specialized features, the CR-09-4S4-30-JA effectively bridges the gap between conventional hydraulic motors and premium smooth-operation solutions, offering a compelling combination of performance, refinement, and reliability that justifies its distinct position within TOKYO KEIKI's esteemed CR Series.