THK RSR12WZMUU390LM LINEAR GUIDE BLOCK RAIL ASSEMBLY

Description:

The THK RSR12WZMUU390LM Linear Guide Block & Rail Assembly is a miniature wide-type recirculating ball linear motion guide consisting of an RSR12WZM bearing block mounted on a 390 mm precision guide rail. Designed for compact, high-precision linear motion applications, the wide-block configuration provides excellent rigidity, smooth low-friction travel, and equal load capacity in all four directions while maintaining a compact footprint. Commonly installed in semiconductor manufacturing equipment, laboratory automation systems, medical devices, optical inspection equipment, electronics assembly machines, and precision measuring systems, this assembly is used by maintenance teams, OEM machine builders, and system integrators for equipment repairs, retrofits, and replacement of miniature linear guide systems. The "UU" designation indicates double end seals for improved protection against dust and contaminants, while the "M" suffix denotes stainless steel construction for enhanced corrosion resistance.

Applications:

The THK RSR12WZMUU390LM linear guide assembly is widely used in semiconductor processing equipment, laboratory instruments, medical diagnostic systems, optical inspection machines, electronics manufacturing equipment, compact CNC machines, pick-and-place systems, miniature robotic assemblies, precision measuring instruments, and other industrial automation applications requiring compact, smooth, accurate, and corrosion-resistant linear motion.

Technical Specifications:

• Manufacturer: THK Ltd.
• Model: RSR12WZMUU390LM
• Product Type: Miniature Linear Guide Block & Rail Assembly
• Series: RSR-WZM
• Guide Type: Recirculating Ball Linear Motion Guide
• Block Type: Wide Type (WZM)
• Rail Size: 12 mm
• Rail Length: 390 mm
• Block Height (M): 14 mm
• Block Width (W): 40 mm
• Block Length (L): 44.5 mm
• Mounting Hole Thread: M3 × 3.6 mm
• Mounting Hole Spacing (B × C): 28 × 15 mm
• Seal Configuration: UU (Double End Seals)
• Material: Stainless Steel LM Block, Rail, and Balls (M designation)
• Rolling Element: Precision Recirculating Steel Balls
• Four-Way Equal Load Design
• High Positioning Accuracy
• Low Friction Operation
• High Rigidity Wide-Block Configuration
• Corrosion-Resistant Construction
• Grease Lubrication Compatible
• Suitable for High-Speed Precision Linear Motion
• Infinite Stroke via Ball Recirculation

Common Replacements:

• THK RSR12WVMUU390LM
• THK RSR12WNUU390LM
• THK SRS12WMUU390L