Our rolled recirculating ball screws are made by subjecting the threaded shaft to a deformation process known as “cold rolling”, a cost and time effective procedure that makes it possible to produce the rolled ball version. However, the distinguishing feature of B.B. brand products is their “Gothic Arch” profile, a particular rolling track profile designed to optimise contact pressure occurring between ball and screw tracks as well as axial load capacity.
This is made up of two symmetrical arches which have a bend radius that is larger than that of the balls themselves. These arches meet on the axis of symmetry, forming a point; the two arches are related to the ball radius in such a way as to produce an optimum contact angle. This solution definitively prevents ball slippage or wedging.
The nut, on the other hand, can be either cylindrical or flanged, and is available in 4 different types.