THK 4HRT2042UUS504L LINEAR BEARING YAH30090 HRT2042 4HRT2042UUS EA

Description:

The THK 4HRT2042UUS504L Linear Bearing is a heavy-load linear guide assembly consisting of four HR2042UU bearing blocks mounted on a 504 mm precision rail. Designed for high rigidity, smooth linear motion, and four-way equal load capacity, it delivers reliable performance in demanding industrial applications requiring high load support and positioning accuracy. Commonly installed in CNC machine tools, machining centers, transfer equipment, industrial robots, precision manufacturing systems, and heavy-duty automation machinery. Maintenance teams, machine builders, and system integrators use this linear bearing assembly for OEM installations, equipment upgrades, repairs, and replacement of heavy-load linear guide systems.

Applications:

The THK 4HRT2042UUS504L belongs to THK's HR Series heavy-load LM Guide family. It features four HR2042UU linear bearing blocks mounted on a 504 mm rail, providing exceptional rigidity and stable linear motion under loads applied from any direction. The HR Series utilizes a four-way equal load design that automatically accommodates installation errors while maintaining high positioning accuracy. The UU designation indicates double end seals for improved protection against contaminants, while the assembly is suitable for applications requiring heavy-duty linear guidance, including machining equipment, gantry systems, industrial automation, precision assembly lines, and material handling equipment. The associated identifier YAH30090 refers to the rail configuration used for this assembly.

Technical Specifications:

• Brand: THK
• Part Number: 4HRT2042UUS504L
• Alternate Reference: YAH30090
• Product Type: Linear Bearing Assembly (LM Guide)
• Series: HR Heavy Load LM Guide Series
• Model: HR2042UU
• Rail Length: 504 mm
• Number of Bearing Blocks: 4
• Guide Size: HR2042
• Bearing Type: Recirculating Ball Linear Bearing
• Load Direction: Four-Way Equal Load
• Block Type: Standard Length
• Seal Type: UU (Double End Seals)
• Rail Mounting: Bolt Mounted from Top or Bottom
• Lubrication: Grease or Oil Lubrication Compatible
• Dynamic Load Rating: 17.0 kN (per block)
• Static Load Rating: 18.2 kN (per block)
• Block Height: 20 mm
• Block Width: 26.3 mm
• Block Length: 91.6 mm
• Operating Temperature: -20°C to +80°C (standard configuration)
• Rail Joint Capability: Supported
• Features: High rigidity, self-aligning capability, four-way equal load design, precision-ground rail, smooth low-friction motion, high positioning accuracy, contamination-resistant double seals, and long service life.

Common Replacements:

• THK 4HRT2042UUS600L
• THK 4HRT2042UUS750L
• THK 4HRT2042TUUS504L