METHOD FOR MANUFACTURING AT LEAST PART OF A DEVICE FOR AN EARTHMOVING OR MATERIALS-HANDLING MACHINE

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Method for manufacturing at least one part of a device (22) for mounting directly or indirectly on an arm (12) of an earth-moving or material-handling machine (10), such as an excavator, tractor, harvester, forwarder or crane, whereby the device (22) enables coupling and/or positioning (tilt and/or turn) of a tool (14), such as a bucket, grapple, fork, vibratory compactor or harvesting head, relatively to the arm of the machine. The method comprises the steps of : a) forming a melt comprising unalloyed or alloyed ductile iron, b) casting at least one part of a device (22) from said melt, c) allowing said at least one part of the device to cool, d) austenitizing said at least one part of the device, e) quenching said at least one part of the device, f) austempering said at least one part of the device, and g) allowing said at least one part of the device to cool.