No.1-H is a high-performance oil-impregnated bearing material, categorized as a general-purpose copper-based alloy, and is equivalent to JIS P4013Z. A key feature of this material is its inherent softness, which enables excellent conformability to mating shafts. This characteristic makes No.1-H particularly well-suited for applications demanding low sliding noise, such as precision motors found in cameras and audio equipment. Furthermore, its Cu-Sn (copper-tin) alloy composition provides a significant advantage by offering effective resistance against rust, a common concern when using iron-based bearing materials. The internal structure of No.1-H is characterized by a uniform distribution of pores, as evidenced by the provided micrograph, which facilitates the impregnation and retention of lubricating oil. This versatile material finds extensive use across various industries. Specific applications include motors for sensitive equipment like cameras and audio systems, a wide range of FAN motors, and components within office automation devices such as multifunction printers. It is also utilized in electric fishing reels and automotive applications, including washer pumps. From a technical standpoint, the material composition of No.1-H is predominantly Copper (balance), with Tin content ranging from 7 to 10 weight percent, and other elements not exceeding 0.5 weight percent. Its mechanical and performance characteristics are robust: it has a permissible PV value of 100 MPa·m/min, indicating its load-carrying and speed capabilities. The maximum allowable pressure (Pmax) is 2 MPa, and the maximum permissible velocity (Vmax) is 100 m/min. The material's density falls within the range of 6.5 to 7.2 g/cm³, and it exhibits a high compressive strength of 150 MPa or greater. The recommended operating range, illustrated by the P-V curve, clearly defines the safe operational envelope, ensuring optimal performance and longevity under the specified pressure and velocity conditions.