A scroll type machine comprising: a first scroll member having a first spiral wrap projecting outwardly from a first end plate; a second scroll member having a second spiral wrap projecting outwardly from a second end plate, said second scroll wrap being interleaved with said first spiral wrap to define a plurality of moving chambers therebetween when said second scroll member orbits with respect to said first scroll member; a fixed member for supporting said first and second scroll members (70 and 56); a drive member for causing said second scroll member to orbit with respect to said first scroll member; an Oldham coupling disposed between said second scroll member and said fixed member, said Oldham coupling preventing relative rotational movement between said first and second scroll members (70 and 56), characterised in that said Oldham coupling comprises: a connecting member; a first post disposed on a surface of the connecting member and defining a first key and a second key, said first scroll member engaging opposing faces of said first key of said first post at an elevation distal to the connecting member and said second scroll member engaging opposing faces of said second key of said first post at an elevation proximate to the connecting member; and a second post disposed on said surface and engaging said second scroll member and said first scroll member. a first scroll member having a first spiral wrap projecting outwardly from a first end plate; a second scroll member having a second spiral wrap projecting outwardly from a second end plate, said second scroll wrap being interleaved with said first spiral wrap to define a plurality of moving chambers therebetween when said second scroll member orbits with respect to said first scroll member; a fixed member for supporting said first and second scroll members (70 and 56); a drive member for causing said second scroll member to orbit with respect to said first scroll member; an Oldham coupling disposed between said second scroll member and said fixed member, said Oldham coupling preventing relative rotational movement between said first and second scroll members (70 and 56), characterised in that said Oldham coupling comprises: a connecting member; a first post disposed on a surface of the connecting member and defining a first key and a second key, said first scroll member engaging opposing faces of said first key of said first post at an elevation distal to the connecting member and said second scroll member engaging opposing faces of said second key of said first post at an elevation proximate to the connecting member; and a second post disposed on said surface and engaging said second scroll member and said first scroll member. a connecting member; a first post disposed on a surface of the connecting member and defining a first key and a second key, said first scroll member engaging opposing faces of said first key of said first post at an elevation distal to the connecting member and said second scroll member engaging opposing faces of said second key of said first post at an elevation proximate to the connecting member; and a second post disposed on said surface and engaging said second scroll member and said first scroll member.