for lateral needle jogging a feed cam follower 60 shown in fig2 is pivotally mounted to a support post 62 and engages a feed transfer plate 64 the motion of the transfer plate 64 is then imparted to a feed control system not shown which may be as disclosed in my copending patent application ser no 850 985 01cu50711 to which reference may be had referring to fig3 for producing buttonholes a buttonhole cam unit 70 is included within the cam stack 40 having a clutch incorporated therein for selectively taking said cam unit 70 out of driving engagement with the cam shaft 42 the cam unit 70 shown in fig8 comprises a circular driving flange 74 having a plurality of radial notches 76 formed in one surface thereof the driving flange 74 is formed with a hub 78 having a bore 80 therein through which the cam shaft 42 passes a set screw 82 in the hub 78 is used to fixedly mount the driving flange 74 to the cam shaft 42 underlying the driving flange 74 is a circular ball bearing carrier plate 84 having a cylindrical rim 86 which embraces the driving flange 74 the carrier plate 84 is formed with two diametrically opposed through holes 88 of equal size for slidably carrying two ball bearings 90 and a central bore 91 through which the hub 78 of the driving flange 74 may freely pass the holes 88 are positioned.