THK Co., Ltd. HSR55A1SS Linear Motion Guide Block

Description:

The THK HSR55A1SS Linear Guide is a heavy-duty flange-type recirculating ball linear bearing block designed for use with THK HSR55 series linear guide rails in high-load, high-precision linear motion systems. Featuring the HSR55A flange configuration with threaded mounting holes and an SS sealing arrangement, this bearing block delivers smooth low-friction movement, exceptional rigidity, and four-way equal load capability for reliable positioning accuracy in demanding industrial applications. Commonly installed in CNC machining centers, industrial robots, semiconductor manufacturing equipment, automated production lines, heavy material handling systems, and precision inspection machines, this linear guide block is used by maintenance teams, OEM machine builders, and system integrators for equipment repair, retrofit, expansion, and replacement.

Applications:

The THK HSR55A1SS is widely used in CNC milling machines, machining centers, gantry systems, robotic automation, semiconductor manufacturing equipment, packaging machinery, heavy-duty factory automation systems, precision measuring equipment, and material handling equipment. Its flange-type carriage with threaded mounting holes provides superior rigidity, high load capacity, and stable linear motion for applications requiring accurate positioning, excellent moment resistance, and long service life under continuous industrial operation.

Technical Specifications:

• Manufacturer Part Number (MPN): HSR55A1SS
• Manufacturer: THK Ltd.
• Product Type: Linear Motion Guide Block
• Series: HSR Global Standard LM Guide
• Block Type: A (Flange Type, Threaded Mounting Holes)
• Guide Type: Four-Row Recirculating Ball Linear Motion Guide
• Compatible Rail Size: 55 mm
• Overall Height (M): 70 mm
• Block Width (W): 140 mm
• Overall Length (L): 163 mm
• Mounting Hole Spacing (B × C): 116 × 95 mm
• Mounting Thread: M14
• Compatible Rail Width: 53 mm
• Rail Height: 44 mm
• Rail Mounting Hole Pitch: 120 mm
• Dynamic Load Rating: 121 kN
• Static Load Rating: 146 kN
• Grease Nipple: B-PT1/8
• Block Weight: Approximately 4.5 kg
• Material: Hardened Bearing Steel
• Seals: SS (End Seal, Side Seal, and Inner Seal)
• Lubrication: Grease or Oil Lubrication
• Features: Four-way equal load design, flange-type carriage with threaded mounting holes, precision-ground raceways, self-aligning capability, high rigidity, low-friction operation, and long service life.

Common Replacements:

• THK HSR55A1UU
• THK HSR55A1SSC1
• THK HSR55HA1SS