above at its outer end each lobe 38 has a cylindrical recess 42 disposed therein the compressor section 14 further includes a crankshaft 46 having an eccentric shaft portion 48 coupled to the orbiting scroll member 20 through a drive bushing and bearing assembly 50 a counter balance weight 60 is fixed to the crankshaft 46 which is supported at its lower end by lower bearing assembly 64 lower bearing assembly 64 is fixedly secured to shell assembly 12 and has a center portion 66 having an elongated bore 68 in which is disposed a journal bearing 70 which is designed to receive the lower end of crankshaft 46 the motor drive section 16 is comprised of a motor stator 80 securely mounted in the lower shell 13 preferably by press fitting and a motor rotor 82 coupled to the crankshaft 46 of the compressor section 14 the lobes 38 of the bearing housing 22 are press fit into the inside diameter of the hermetic shell assembly 12 after proper positioning of the bearing housing 22 inside the lower shell 13 a staking tool 90 is forced radially inwardly against the shell to plastically deform the lower shell 13 in each of the areas of the recesses 42 to form a plurality of circular staked portions 92 as best shown in fig3 the lower shell 13 is deformed sufficiently to cause the edge 94 of recess 42 to bite into the shell metal to form a cylinder retention surface 92 but the plastic deformation of the upper shell is not sufficient to affect the hermetic seal of the sealed chamber 21 by overly weakening or.