THK HSR20R1SS-GK Precision Linear Guide Block

Description:

The THK HSR20R1SS(GK) Linear Guide Block is a compact narrow-type precision recirculating ball linear motion bearing designed for use with THK HSR20 series guide rails. As part of THK's Global Standard (GK) interchangeable series, it features an R-type narrow carriage with threaded mounting holes and SS sealing (end, side, and inner seals) for superior protection against contaminants while delivering smooth, high-precision linear motion. Commonly installed in CNC machine tools, semiconductor equipment, industrial robots, medical equipment, and factory 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 HSR20R1SS(GK) Linear Guide Block is ideal for compact automation systems, CNC machining centers, semiconductor manufacturing equipment, robotic positioning systems, medical devices, inspection machines, packaging equipment, and precision linear motion applications where installation space is limited but high rigidity, smooth travel, and accurate positioning are required. The narrow R-type design allows installation in applications with restricted table width while maintaining THK's four-way equal load capability.

Technical Specifications:

• Manufacturer: THK Ltd.
• Brand: THK
• Manufacturer Part Number: HSR20R1SS(GK)
• Product Type: Linear Guide Block (LM Guide Carriage)
• Series: HSR Global Standard (GK)
• Block Style: R (Narrow Type)
• Rail Compatibility: THK HSR20 Series (20 mm Rail)
• Guide Type: Precision Recirculating Ball Linear Guide
• Interchangeable: Yes (GK Series)
• Seal Configuration: SS (End Seals + Side Seals + Inner Seals)
• Overall Height (M): 30 mm
• Block Width (W): 44 mm
• Block Length (L): 74 mm
• Carriage Height (K): 26 mm
• Mounting Dimensions (B × C): 32 mm × 36 mm
• Mounting Thread: M5 × 6 mm
• Rail Width: 20 mm
• Rail Height: 18 mm
• Rail Mounting Hole Pitch: 60 mm
• Basic Dynamic Load Rating: 19.8 kN
• Basic Static Load Rating: 27.4 kN
• Block Weight: Approximately 0.25 kg
• Material: Hardened Bearing Steel
• Standard Grease Nipple: B-M6F
• Operating Temperature: -20°C to +80°C
• Features: Four-way equal load design, compact narrow profile, self-aligning capability, interchangeable GK design, high rigidity, low-friction operation, and long service life.

Common Replacements:

• THK HSR20R1UU(GK) Linear Guide Block
• THK HSR20C1SS(GK) Linear Guide Block
• THK SHS20R Linear Guide Block