FK Ball Screw Support Bearing

Overheating is mostly caused by excessive preload, excessive lubrication or improper lubricant selection, interference due to over-tight installation, damaged bearings, poor environmental ventilation, or long-term high-load operation. For troubleshooting and handling, adjust the preload using a torque wrench according to technical parameters; reduce the lubricant quantity to 1/3-1/2 of the bearing internal space and replace with low-viscosity, high-heat-dissipation grease; check the fit clearance and grind the interfering parts; replace the damaged bearing and clean impurities; improve ventilation, install heat dissipation or cooling devices, and avoid long-term full-load operation.

The accuracy decrease may be caused by increased bearing wear or clearance, deformation of the installation datum surface (e.g., box plane) or loose bolts, failure of the preload structure, or excessive fit tolerance between the support bearing and the screw. Solutions include testing the bearing clearance and replacing it with a new one if exceeding the allowable range, then readjusting the preload; repairing or replacing the deformed installation datum surface, tightening bolts with a torque wrench according to specified torque, and adding locating pins if necessary to fix the support bearing position; replacing the fatigued disc spring in the preload structure, retightening the preload nut to ensure the preload meets design requirements; reprocessing or selecting matching parts between the screw and support bearing to ensure shoulder positioning accuracy and tightness of key connection, eliminating fit clearance.

Rust and jamming are mainly caused by insufficient protective measures (allowing humid air, dust, or corrosive media to enter the support bearing), failure of anti-rust grease, and dust accumulation in the bearing raceway. Protection and handling methods include installing protective devices such as dust covers (e.g., telescopic covers, bellows covers) or sealing rings (e.g., double-lip sealing rings) outside the support bearing to isolate external dust and moisture; replacing with extreme pressure lithium-based grease or polyurea grease with anti-rust and waterproof properties, and replenishing grease regularly to maintain protection; disassembling the support bearing during shutdown, cleaning the bearing and internal components with kerosene or special cleaning agent to remove rust and dust, then reapplying grease after drying; improving environmental conditions by installing dehumidifiers or dust screens around the equipment if the environment is harsh, or applying anti-rust treatments such as galvanizing or chrome plating on the support bearing surface.