Therefore, it is important to secure as a danger zone a cylindrical area with the length of the clamp arm as its radius, and the stroke plus 20 mm as its height. 123 135 155 203 363 518 65 56 Head flange (including mounting bolt) 130 150 175 209 371 578 69 58 Calculation: (Example) MKG20-10RNZ Standard calculation: MKB20-10RZ Extra weight calculation: Head flange With arm ...222 g .130