Method of manufacturing hydraulic hammer using male and female gauges

A method of manufacturing a hydraulic hammer using male and female gauges;

• the hammer comprising a chuck housing with a first threaded fitting and a body machined with a cooperatively formed second threaded fitting such that the chuck housing and the body are configured to be screwed together;
• the male and female gauges each having a thread that is formed to allow the gauges to be screwed together and each having at least one circumferential marking such that the gauges' relative rotational position can be determined when they are screwed together;
• the method comprising the steps of:
• machining the chuck housing with the first threaded fitting such that a first of the male and female gauges can be screwed therein;
• fully screwing the first gauge into the chuck housing and marking the chuck housing such that a rotational position of the first gauge relative to the chuck housing can be determined;
• removing the first gauge;
• hardening the chuck housing;
• determining the distortion of the chuck housing caused by the hardening by fully screwing the first gauge into the chuck housing and determining their relative rotational positions;
• machining the chuck housing on the basis of the determined distortion;
• and
• machining the body with the second threaded fitting such that a second of the male and female gauges can be screwed thereon.