THK HSR20A1SS(GK) Linear Motion Bearing Block

Description:

The THK HSR20A1SS(GK) Linear Motion Bearing Block is a precision recirculating ball LM Guide carriage designed for use on THK HSR20 guide rails. Featuring THK's Four-Way Equal Load design and stainless steel raceway components (SS), it provides smooth, high-accuracy, and low-friction linear motion while offering excellent corrosion resistance and rigidity. Commonly installed in CNC machine tools, robotics, semiconductor manufacturing equipment, packaging machinery, and industrial automation systems, this bearing block is used by maintenance teams, OEM machine builders, and system integrators for equipment repair, retrofit, expansion, and replacement.

Applications:

The THK HSR20A1SS(GK) bearing block is widely used in CNC machining centers, pick-and-place robots, semiconductor equipment, medical devices, automated inspection systems, packaging machinery, and precision motion control applications requiring smooth travel, repeatable positioning, high rigidity, and long service life. The interchangeable (GK) design simplifies maintenance and replacement while maintaining precise linear motion.

Technical Specifications:

• Manufacturer: THK Ltd.
• Brand: THK
• Manufacturer Part Number: HSR20A1SS(GK)
• Product Type: Linear Motion Bearing Block (LM Guide Carriage)
• Series: HSR Global Standard (GK)
• Rail Size: 20 mm
• Block Style: A (Flange Type)
• Guide Type: Precision Recirculating Ball Linear Guide
• Interchangeable Series: GK
• Seal Configuration: SS (End Seals + Side Seals)
• Raceway Material: Stainless Steel (SS)
• Overall Height (M): 30 mm
• Overall Width (W): 63 mm
• Overall Length (L): 74 mm
• Mounting Dimensions (B × C): 53 mm × 40 mm
• Mounting Thread: M6
• Basic Dynamic Load Rating: 19.8 kN
• Basic Static Load Rating: 27.4 kN
• Load Design: Four-Way Equal Load
• Lubrication: Grease or Oil Lubrication Compatible
• Features: High rigidity, low-friction operation, self-aligning capability, corrosion-resistant race components, high positioning accuracy, interchangeable with compatible HSR20(GK) rails, and long service life.

Common Replacements:

• THK HSR20HA1SS(GK) Linear Bearing Block
• THK HSR20CA1SS(GK) Linear Bearing Block
• THK SHS20C1SS Linear Bearing Block