Abstract: An isolated lubrication system for a drill bit is disclosed. The system comprises a body having a cutting arm with a journal and a rotary cutter mounted on the journal. The system also comprises a reservoir in a body to contain a fluid lubricant that isolated from communication outside the body. The system also comprises multiple conduits in communication with the reservoir and with respect to each other. The multiple conduits facilitate lubrication between the journal and the rotary cutter, including the bearings, by means of a gravitational force and/or a centrifugal force acting of the fluid lubricant. Further, the system comprises a sealing system. The sealing system includes a sealing cap provided to the reservoir, a seal provided between the journal and the rotary cutter, and a stepped passageway provided in a clearance between the rotary cutter and a cutting arm of the body.

Abstract: An example track shoe, cutting edge, or other component of a machine is formed in a heated process, such as hot-rolling followed by air-hardening. The air-hardening process involves cooling the component by flowing air over the component (e.g., air cooling), such that the component is cooled at a controlled rate. During the air-cooling process, such as in the range of about 250° C. to about 1100° C., the component may be machined, such as by shearing, punching, drilling, etc. The machining may form the final shape of the component. As the air-hardening process is completed, and the component approaches room temperature, the component may have at least 5% bainitic crystal composition, and as high as greater than 80% bainitic crystal composition, resulting in relatively high hardness and fracture toughness. The final track shoe may have a hardness between about 40 HRC and 55 HRC.

Abstract: An isolated lubrication system for a drill bit is disclosed. The system comprises a body having a cutting arm with a journal and a rotary cutter mounted on the journal. The system also comprises a reservoir in a body to contain a fluid lubricant that isolated from communication outside the body. The system also comprises multiple conduits in communication with the reservoir and with respect to each other. The multiple conduits facilitate lubrication between the journal and the rotary cutter, including the bearings, by means of a gravitational force and/or a centrifugal force acting of the fluid lubricant. Further, the system comprises a sealing system. The sealing system includes a sealing cap provided to the reservoir, a seal provided between the journal and the rotary cutter, and a stepped passageway provided in a clearance between the rotary cutter and a cutting arm of the body.

Abstract: A method for manufacturing a ground engaging component is disclosed. The method includes providing a mixture of compacted powders including carbon, titanium, and a first alloy, the first alloy having a first composition and heating the mixture to a temperature and for a duration sufficient to combine the mixture to form an insert having a desired shape. The method further includes locating the insert in a desired position in a mold and casting a second alloy having a second composition into the mold, the second alloy forming a ground engaging component with the insert bonded therein.

Abstract: A method of casting an article includes positioning a first portion of the article, formed from a first material, in a rotatable mold. Additionally, the method includes, while rotating the mold, pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

Abstract: The disclosure may provide a method of forming a track assembly. In the method, a track pin may be disposed within a first through hole of a first track link and within a second through hole of a second track link. A force may be applied to a tool positioned in a first position to plastically deform a first portion of the first track link which surrounds the first through hole, to thereby form a first connection between the track pin and the first track link. A force may be applied to the tool positioned in a second position to plastically deform a second portion of the first track link which surrounds the first through hole, to thereby form a second connection between the track pin and the first track link. The second connection may be formed after the first connection.

Abstract: A method of casting an article includes positioning a first portion of the article, formed from a first material, in a rotatable mold. Additionally, the method includes, while rotating the mold, pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

Abstract: A method of casting an article includes positioning a first portion of the article, formed from a first material, in a rotatable mold. Additionally, the method includes, while rotating the mold, pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

Abstract: A steel article is provided for improved wear resistance due to optimized hardness, toughness and temper resistance. In one exemplary embodiment, the steel article may have a composition including about 0,2 to 0.43 percent by weight of carbon, about 0.5 to about 3.0 percent by weight of silicon, about 0.01 to about 3.0 percent by weight of chromium, and 0.43 to about 2.5 percent by weight of vanadium.

Abstract: A wear component includes a base portion and a tip portion. The tip portion includes a proximate end and a distal end. The proximate end is metallurgically bonded to the base portion at a base-tip interface, which may have a generally parabolic cross-sectional profile. The distal end defines an exterior surface of the wear component.

Abstract: A method of casting an article includes positioning a first portion of the article, formed from a first material, in a rotatable mold. Additionally, the method includes, while rotating the mold, pouring a molten second material into the mold over the first portion to form a second portion of the article that is metallurgically bonded to the first portion of the article.

Abstract: The disclosure may provide a method of forming a track assembly. In the method, a track pin may be disposed within a first through hole of a first track link and within a second through hole of a second track link. A force may be applied to a tool positioned in a first position to plastically deform a first portion of the first track link which surrounds the first through hole, to thereby form a first connection between the track pin and the first track link. A force may be applied to the tool positioned in a second position to plastically deform a second portion of the first track link which surrounds the first through hole, to thereby form a second connection between the track pin and the first track link. The second connection may be formed after the first connection.