THK Co., Ltd. LMCF20LUU Round Center Flange Linear Bushing

Description:

The THK LMCF20LUU Round Center Flange Linear Bushing is a long-type, center-flanged linear ball bearing designed to provide smooth, low-friction linear motion on a 20 mm hardened shaft. Its centrally positioned round flange allows loads and mounted components to be evenly distributed on both sides of the bearing, making it ideal for applications requiring balanced linear travel, high rigidity, and precise positioning. Commonly installed in CNC machinery, industrial automation systems, semiconductor equipment, packaging machines, and precision assembly equipment, this bearing is used by maintenance teams, OEM machine builders, and system integrators for equipment repairs, retrofits, and replacement of worn linear bushings.

Applications:

The THK LMCF20LUU is commonly used in CNC machining centers, industrial robots, automated assembly equipment, semiconductor manufacturing systems, packaging machinery, medical devices, inspection equipment, linear actuators, and material handling systems requiring smooth, accurate, and balanced linear motion on 20 mm guide shafts. Its center flange design is especially suited for applications where workpieces or fixtures are mounted directly to the flange for equal stroke distribution in both directions.

Technical Specifications:

• Manufacturer Part Number (MPN): LMCF20LUU (#324841)
• Manufacturer: THK Ltd.
• Product Type: Round Center Flange Linear Ball Bushing
• Series: LMCF-L Series (Long Type)
• Bearing Type: Center Flange Linear Bearing
• Nominal Shaft Diameter: 20 mm
• Outer Diameter: 32 mm
• Overall Length: 80 mm
• Flange Diameter: 54 mm
• Flange Position: Center
• Bearing Style: Long Type (LUU)
• Rolling Element: Recirculating Steel Balls
• Seal Type: Double-End Seals (UU)
• Basic Dynamic Load Rating: 1.40 kN (1400 N)
• Basic Static Load Rating: 2.75 kN (2750 N)
• Motion Type: Precision Linear Motion
• Lubrication: Grease or Oil Lubrication
• Maximum Recommended Operating Temperature: 80 °C (synthetic resin retainer)
• Construction Material: Hardened Bearing Steel with Resin Ball Retainer
• Features: Low friction, smooth operation, balanced load distribution, high positioning accuracy, long service life, and compact flange mounting.

Common Replacements:

• THK LMF20LUU
• THK LM20UU
• THK LMIF20LUU