main bearing housing 90 using a plurality of bolts not shown thrust plate 92 defines flat thrust bearing surface 54 on which is disposed orbiting scroll member 56 a flat surface 94 on which oldham coupling 68 is supported referring now to fig2 main bearing housing 90 comprises a generally circular section 100 which supports thrust plate 92 a plurality of legs 102 four in the embodiment shown extend radially outward from circular section 100 in the embodiment illustrated the outer surface 104 of each leg 102 defines an effective diameter that provides a clearance with shell 12 each leg 102 includes an upstanding tower 106 through which extend a mounting hole 108 mounting holes 108 are utilized to secure main bearing housing 90 to compressor mounting frame 22 using bolts 110 as shown in fig1 in another embodiment of the present invention not shown the outer surface 104 of each leg 102 defines an effective diameter that is press fit into shell 12 in this embodiment mounting hole 108 in each tower 106 is eliminated because main bearing housing 90 is attached to shell 12 and not directly attached to mounting frame 22 the inner surface 112 of each tower 106 is machined to radially support thrust plate 92 main bearing housing 90 further comprises a frusto conical web 114 which is angled downwardly to support a cylindrical section 116 frusto conical web 114 extends from the lower end of circular section 100 to the lower end of cylindrical section 116 cylindrical section 116 defines an inner bore.