of an inch wide in addition the diameter of a portion 144 of the bar 220 which is adjacent to the conical tip 142 is greater than the diameter of the portion 146 of the bar 220 the diameter of the portions 138 and 144 of the bar 220 are preferably at least 1 4 inch greater than the diameter of the portion 146 of the bar 220 those skilled in the art will recognize that the cross section of the bar 220 of this embodiment may also be semi circular in order to achieve the proper clearance between the bar 220 and the draft rollers 3 the yarn control guide 25 is movably coupled within a slot 152 formed in an intermediate portion of the bar 140 by means of a pin 154 and a second end of the bar 140 is rotatably coupled to a frame 148 of the spinning machine via a bolt 150 thus the yarn guide 25 may be rotated about the bar 20 by moving the pin 154 within the slot 152 the operative position of the bar 140 as shown in fig7 and consequently the operative position of the bar 20 and yarn guide 25 is limited by a stop pin 156 which projects from the frame 148 and prevents rotation of the bar 140 beyond.