Circular knitting machine with a replaceable needle cylinder

Circular knitting machine comprising:

• a replaceable needle cylinder (7) having an underside, a support ring (3) having a surface (6) for supporting said underside of said the needle cylinder (7), at least one attachment (9) projecting axially above said underside and a means to facilitate replacement of the needle cylinder (7), said means having lifting parts acting on said needle cylinder (7) and by means of which said needle cylinder (7) is selectively adjustable into an operating position, in which its underside lies on said supporting surface (6) and is arranged below an upper edge of said attachment (9), and into a mounting position, in which its underside is held in a raised position by said lifting parts, so that said underside is arranged to be at least flush with said upper edge of said attachment (9), characterised in that said lifting parts contain eccentrics (19, 32), which are arranged between the support ring (3) and said needle cylinder (7) and are disposed to be rotatable around rotational axes (20, 37) arranged transversely to a machine axis (4).