Provided are a chain component that has a simple surface treatment structure and can maintain good wear resistance over a long time, and a chain that includes the chain component and maintains good wear elongation resistance. The chain component of a power transmission chain for industrial use includes a chromium nitride layer formed on an outer side of a steel base material and containing more than 0 mass % but not more than 55 mass % iron. At least a surface of the chromium nitride layer that slides against other components is a rough surface with peaks and valleys.

A chain tool with a main body having a first body portion and a second body portion. A driving mechanism is supported by the first body portion and movable toward and away from the second body portion. The driving mechanism includes a first driving member adapted to retain one of a pair of plates of a chain and a second driving member adapted to drive a pin through the pair of plates. A stopper adapted to stop the pin selectively connected with the second body portion between a first and a second connection way. The second body portion has a slot for connecting the stopper. In the first connection way, the stopper includes a first end inserted in the slot. In the second connection way the stopper includes a second end inserted in the slot.

A method for forming a laser-marked chain assembly. The method includes: coupling a plurality of chain links to one another for form a length of chain having a first and a second end; marking an outer plate of at least one of the plurality of chain links with a laser; and coupling the first and second ends to one another to form the laser-marked chain assembly.

Provided are a chain component that has a simple surface treatment structure and can maintain favorable wear resistance over a long time, and a chain that includes this chain component and maintains favorable wear elongation resistance. The chain component of a power transmission chain for industrial use includes a chromium nitride layer containing more than 0 mass % but not more than 55 mass % iron and formed on an outer side of a steel base material.

Provided are a chain component that has a simple surface treatment structure and can maintain good wear resistance over a long time, and a chain that includes the chain component and maintains good wear elongation resistance. The chain component of a power transmission chain for industrial use includes a chromium nitride layer formed on an outer side of a steel base material and containing more than 0 mass % but not more than 55 mass % iron. At least a surface of the chromium nitride layer that slides against other components is a rough surface with peaks and valleys.

A random pattern chain assembly of the present invention improves noise, vibration and harshness (NVH) performance of a silent or inverted tooth chain. The chain assembly preferably uses at least three different link types arranged in a known pattern. The pattern is arranged such that the first link type is never adjacent the third link type, in that there is always a second link type between the first link type and the third link type.

A method of manufacturing a chain (1), such as a cutting chain for a chain saw, includes providing or pre-assembling a plurality of chain sub-units (10). At least a sufficient property and/or a sufficient functionality of each chain sub-unit (10) are tested. A head-to-tail coupling is combined with the plurality of chain sub-units (10) provided with the sufficient property and/or sufficient functionality of the testing step to make a chain (1) of a predefined length.

A chain includes a plurality of inner links and a plurality of outer links. Each of the inner links includes a pair of inner plates each having a bush hole and a bush. The bush includes both end portions which are press-fitted into bush holes of the pair of the inner plates. Each of the outer links includes a pair of outer plates and a pin. A diametric dimension in a pitch direction of an inner diametric surface of the bush is constant along an entire axial length of the bush. A diametric dimension in a height direction of the inner diametric surface at each of the both end portions of the bush is smaller than a diametric dimension in the height direction of the inner diametric surface at an intermediate part of the bush located between the pair of inner plates.

An apparatus 1 for processing chain C. The chain comprises links L.sub.1, L.sub.2, L.sub.3 mutually connected by pin portions R. The apparatus comprises a chain holder 3 (to hold the chain) and a pin disengager 5 (operable to remove one of the pin-members to disconnect a portion of the chain from a remainder of the chain). The pin disengager is positioned, or positionable, relative to the chain holder to define a length of the portion of the chain.

The present invention relates to an agricultural chain detacher device designed for detaching or attaching chain links in an agricultural chain. The device features a base with a pair of adjustable clamps to securely hold chains of varying sizes. A vertical wall extends from the base to support a chain link in a vertical orientation. The device includes a screw mechanism with a die hand crank to enable linear movement of a die to interact with the chain link for removal or attachment of the chain link. A center stopper on the base maintains a minimum gap between the clamps for smooth movement of the chain. For attaching a new link, a link connection die is used for fastening flat edge of the new link with curved edge of another link. For removing a link from the chain, a link removing die is used for detaching the link.