Screw wings | It is one of the types of screw wings that can be used with a ball holder rack, with low noise and low torque oscillations, as well as without the need for service for a longer period of time. The main technical consideration is the shelving wing screw. The shelved wing screw has the model number as follows: SBN, SBK Screw-winged wing, SDA Screw-winged wing, HBN Screw-winged wing, SBKH Screw-winged wing.
