Tyngdepunktet af de af slaglegemets dele, som faktisk befinder sig foran det momentbegrænsende led, herunder eventuelle lodder, skal med en tolerance på ±10 mm ligge i slaglegemets langsgående centerlinje.
The centre of gravity of those parts of the impactor which are effectively forward of the torque limiting joint, including the extra weights fitted, shall lie on the longitudinal centreline of the impactor, with a tolerance of ±10 mm.