THK HSR25YR1SS Linear Bearing Block for THK HSR Series

Description:

The THK HSR25R Linear Bearing Block (HSR25YR1SS, Y4J27, CL) is a precision recirculating ball linear guide carriage designed for use with THK HSR25 series guide rails. Its narrow-profile design provides smooth, accurate, and high-rigidity linear motion while supporting equal loads in all four directions. Commonly installed in CNC machining centers, industrial robots, semiconductor equipment, packaging machinery, and automated production systems, this linear bearing block is used by maintenance teams, OEM machine builders, and system integrators for equipment repairs, machine retrofits, and replacement of worn linear motion components.

Applications:

The THK HSR25R Linear Bearing Block is ideal for CNC machine tools, robotic positioning systems, automated assembly equipment, semiconductor manufacturing machinery, precision inspection systems, packaging machines, medical equipment, and factory automation applications requiring high positioning accuracy, heavy-load capacity, and reliable low-friction linear motion. Its compact narrow-width block design makes it suitable for installations with limited mounting space while maintaining THK's four-way equal load capability.

Technical Specifications:

• Manufacturer: THK Ltd.
• Manufacturer Part Number (MPN): HSR25YR1SS
• Additional Markings: Y4J27, CL
• Brand: THK
• Product Type: Linear Bearing Block (LM Guide Carriage)
• Series: HSR Global Standard (GK Series)
• Bearing Block Model: HSR25R
• Guide Rail Compatibility: THK HSR25 Series Rails
• Guide Type: Recirculating Ball Linear Motion Guide
• Block Type: Narrow Standard Block (R Type)
• Mounting Style: Top Mount with Tapped Holes
• Block Height: 40 mm
• Block Width: 48 mm
• Block Length: 83.1 mm
• Rail Width Compatibility: 23 mm
• Basic Dynamic Load Rating: 27.6 kN
• Basic Static Load Rating: 36.4 kN
• Lubrication: Grease or Oil Lubrication Compatible
• Grease Nipple: B-M6F
• Seal Configuration: SS (End Seals + Side Seals)
• Material: Hardened Bearing Steel
• Features: Four-way equal load design, high rigidity, self-adjusting capability, high positioning accuracy, compact narrow profile, and interchangeable with compatible HSR25 guide rails.

Common Replacements:

• THK HSR25R (GK) Linear Bearing Block
• THK HSR25RM (GK) Linear Bearing Block
• THK HSR25XR (GK) Linear Bearing Block