A feed mechanism for pocketed spring strands, the feed mechanism comprising: an index wheel (111, 112) having a plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) for engaging between pocketed springs of a pocketed spring strand; and a motor for driving rotation of the index wheel, wherein the index wheel (111, 112) comprises: - a first support member which is rotatable about a first rotation axis (Z1; Z2) and comprises, for each of the plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312), a first support element (402, 412) which supports a shaft element (401, 411) of the blade (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) to be tiltable about a tilt axis extending in parallel to the first rotation axis (Z1, Z2), - a second support member which is rotatable about a second rotation axis (Z1', Z2') which extends in parallel to the first rotation axis (Z1, Z2) and comprises, for each of the plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312), a second support element (403, 413) which is slidable along the shaft element (401, 411) of the blade (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) and supports the shaft element (401, 411) to be tiltable about said tilt axis, wherein the first support member and the second support member are movable relative to each other to set a parallel shift (Y1, Y2) of the first rotation axis (Z1, Z2) and the second rotation axis (Z1', Z2'). an index wheel (111, 112) having a plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) for engaging between pocketed springs of a pocketed spring strand; and a motor for driving rotation of the index wheel, wherein the index wheel (111, 112) comprises: - a first support member which is rotatable about a first rotation axis (Z1; Z2) and comprises, for each of the plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312), a first support element (402, 412) which supports a shaft element (401, 411) of the blade (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) to be tiltable about a tilt axis extending in parallel to the first rotation axis (Z1, Z2), - a second support member which is rotatable about a second rotation axis (Z1', Z2') which extends in parallel to the first rotation axis (Z1, Z2) and comprises, for each of the plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312), a second support element (403, 413) which is slidable along the shaft element (401, 411) of the blade (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) and supports the shaft element (401, 411) to be tiltable about said tilt axis, - a first support member which is rotatable about a first rotation axis (Z1; Z2) and comprises, for each of the plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312), a first support element (402, 412) which supports a shaft element (401, 411) of the blade (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) to be tiltable about a tilt axis extending in parallel to the first rotation axis (Z1, Z2), - a second support member which is rotatable about a second rotation axis (Z1', Z2') which extends in parallel to the first rotation axis (Z1, Z2) and comprises, for each of the plurality of blades (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312), a second support element (403, 413) which is slidable along the shaft element (401, 411) of the blade (301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312) and supports the shaft element (401, 411) to be tiltable about said tilt axis, wherein the first support member and the second support member are movable relative to each other to set a parallel shift (Y1, Y2) of the first rotation axis (Z1, Z2) and the second rotation axis (Z1', Z2').