Abstract: The feeding device (1) comprises two sliding rails (2, 3) arranged in parallel to each other and obliquely to the horizontal. The gap (5) between these rails can be adjusted to the diameter of the bolt blanks to be profiled. In order to be able to perform this adjustment of the gap (5) faster and more accurately, the sliding rails (2, 3) form a parallelogram-type linkage with traverses (10) located above these rails and obliquely to their longitudinal extension. The traverses (10) are attached to bars (9) rotatable in clamping sleeves (6, 7) and mounted so that they can be fixed in position. The clamping sleeves (7) on the movable sliding rail (3) are located, in the conveying direction of the feeding device (1), in front of those (6) on the fixed sliding rail (2), so that the width of the gap (5) is adjustable by pivoting the traverses (10). The device is utilized in machines for rolling thread or other peripheral profiling operations.