| 摘要 |
A linkage pin assembly is disclosed. The linkage pin assembly includes a grease fitting, a linkage pin, and a coupling. The grease fitting includes an outer shell. The outer shell encloses an internal cavity. The outer shell includes a thread blank having at a second end of the outer shell. The thread blank includes hardened lead threads. The hardened lead threads are induction hardened to at least RKW C 53. The linkage pin has an untapped hole. The coupling is between the grease fitting and the linkage pin. The coupling is formed when the hardened lead threads of the grease fitting create corresponding threads in the untapped hole of the linkage pin when the grease fitting is inserted into the linkage pin.
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