Description
Rexroth LT304
Technical Specifications Screw diameter 30 mm; Standard lead options; Precision grade C5 / C7; Max linear speed 5 m/s; Dynamic load rating 4385 N; Static load rating 4460 N; Operating temperature range -10℃ to +80℃; Preload adjustable; Built-in wiper seals.
Functional Features Low friction recirculating ball structure to reduce driving torque; High positioning repeatability for continuous linear positioning; Adjustable preload eliminates backlash for high-precision applications; Integrated wiper seal prevents dust, chips and coolant contamination; Support high acceleration up to 150 m/s²; Long service life under regular lubrication; Compatibility with Rexroth linear guide and actuator systems.
Application Scenarios CNC machine tool feed axis; Automated gantry handling system; Packaging machine linear positioning; 3D printing large stroke motion platform; Semiconductor equipment linear transport mechanism.
Performance Parameters Operating ambient temperature -10℃ to +80℃; Storage temperature -40℃ to +85℃; Relative humidity 5% to 90%, no condensation; Positioning accuracy depends on precision grade; Grease lubrication recommended.
Material Composition High-carbon chromium alloy steel for screw shaft and ball raceway; Hardened bearing steel rolling balls; Reinforced plastic wiper seal; Aluminum alloy nut housing; High-performance lithium-based lubricating grease prefilled.
Structural Characteristics Cylindrical threaded screw shaft; Recirculating ball nut assembly; Internal ball circulation channel inside nut body; External mounting flange on nut for mechanical connection; Double-sided wiper seals at both ends of nut; Standard shaft ends for coupling mounting.
Working Principle Rotary torque from driving motor transfers to ball screw shaft. Rolling balls circulate inside the raceway between screw shaft and nut. The rolling contact converts rotation into linear motion of nut assembly. Preload removes mechanical backlash, ensuring precise linear position output. Seals keep contaminants outside the ball raceway.
Installation Requirements Align screw shaft and guide rail parallelism strictly during mounting. Support both ends of screw shaft with bearing housings. Apply proper preload setting on nut assembly. Fill or replenish specified Rexroth Dynalub grease before commissioning. Keep the protective cover intact to block metal chips and liquid splash.
Usage Notes Avoid axial impact and overload shock load. Do not run without lubricant. Inspect seal condition and grease replenishment periodically. Prevent metal chips and abrasive dust entering nut assembly. Protect screw thread surface from scratches and corrosion.
