THK 3SRS9WMSSC1275LM Linear Motion Guide Assembly

Description:

The THK 3SRS9WMSSC1275LM Linear Guide is a miniature precision LM Guide assembly consisting of three SRS9WM wide-type ball bearing carriages mounted on a 1,275 mm stainless steel rail. Designed to provide smooth, high-accuracy linear motion with four-way equal load capability, it delivers excellent rigidity and reliable performance in compact automation systems. Commonly installed in semiconductor equipment, laboratory instruments, medical devices, optical inspection systems, and precision manufacturing machinery. Machine builders, maintenance technicians, and system integrators use this linear guide assembly for OEM installations, retrofits, repairs, and replacement of miniature linear motion systems.

Applications:

The THK 3SRS9WMSSC1275LM belongs to THK's SRS miniature LM Guide Series and features three SRS9WM wide-type carriages mounted on a 1,275 mm stainless steel rail. The WM carriage design provides greater rigidity and load capacity than the standard S-type block while maintaining a compact footprint. The SS designation indicates side seals, and the C suffix denotes a caged-ball configuration for reduced noise, smoother operation, and extended maintenance intervals. This assembly is well suited for precision positioning systems, electronics manufacturing equipment, compact robotics, measuring instruments, and other applications requiring accurate, low-friction linear guidance over a long travel distance.

Technical Specifications:

• Brand: THK
• Part Number: 3SRS9WMSSC1275LM
• Product Type: Miniature Linear Guide Assembly with Ball Bearing Carriages
• Series: SRS Miniature LM Guide Series
• Model: SRS9WMSSC
• Rail Length: 1,275 mm
• Guide Size: 9 mm
• Number of Carriages: 3
• Block Type: WM (Wide, Medium Length)
• Ball Retainer: Caged Ball (C)
• Seal Type: SS (Side Seals)
• Bearing Type: Recirculating Ball Linear Bearing
• Guide Design: Four-Way Equal Load
• Rail Material: Stainless Steel (LM Specification)
• Block Material: Stainless Steel
• Block Width: 30 mm
• Block Height: 12 mm
• Block Length: 39 mm
• Basic Dynamic Load Rating: 3.29 kN
• Basic Static Load Rating: 3.34 kN
• Preload Grade: Normal or C1 Light Preload (configuration dependent)
• Accuracy Grade: Normal, High (H), or Precision (P) depending on specification
• Lubrication: Grease or Oil Lubrication Compatible
• Features: Wide-block design, caged-ball technology for low noise and smooth motion, high rigidity, precision-ground stainless steel rail, four-way equal load capability, corrosion-resistant construction, and long service life.

Common Replacements:

• THK 2SRS9WMSSC1275LM
• THK 3SRS9WMSC1275LM
• THK 3SRS12WMSSC1275LM