Linear Motion Ball Bearing

Specifications

• Type: Linear Motion Ball Bearing (LM Bearing)
• Model Variants:
  • LM (Standard)
  • LME (European Standard)
  • LMH (Square Flange)
  • LMK (Round Flange)
  • LMUU (Sealed)

Materials

• Outer Ring: Hardened Steel (high-carbon chromium bearing steel, typically GCr15)
• Ball Material: Chrome Steel (GCr15) or Stainless Steel (for corrosion-resistant variants)
• Cage/Retainer: Nylon or Polyamide (to hold the balls in place)

Mechanical Specifications

• Shaft Diameter Compatibility: Available in standard sizes, commonly ranging from 3mm to 80mm (e.g., 8mm, 12mm, 16mm, etc.)
• Outer Diameter: Varies based on shaft size and specific bearing type
  • For example, for a shaft diameter of 8mm (LM8UU):
    • Outer Diameter: 15mm
    • Length: 24mm
• Load Capacity: Depends on the size and type of the bearing. Standard bearings support moderate radial loads with high precision.
• Linear Accuracy: Typically in the micron range, providing high precision linear guidance.

Performance Specifications

• Operating Speed: Linear motion bearings allow high-speed motion with minimal friction; speeds can vary but typically reach up to 3m/s depending on lubrication and load conditions.
• Friction Coefficient: Low, generally around 0.001 – 0.003 when properly lubricated.
• Noise Level: Low-noise operation when installed correctly, but noise may increase under high speeds or improper lubrication.

Features

• High Precision: Offers smooth, low-friction linear movement, suitable for precision machinery.
• Durability: Made from high-grade materials for a long service life, especially in high-cycle applications.
• Low Maintenance: Requires lubrication but offers reliable performance with minimal upkeep.
• Sealed Design (Optional): Some models come with rubber seals (e.g., LMUU type) to keep out contaminants and reduce maintenance.
• Corrosion Resistance: Available in stainless steel for high-corrosion environments.

Applications

• Commonly used in:
  • 3D Printers (for smooth axis movement)
  • CNC Machines (for precision tool guidance)
  • Automation Systems (robotics, conveyors)
  • Industrial Equipment (linear actuators, precision instruments)

Lubrication

• Lubrication Type: Can use oil or grease, depending on the operating environment.
• Sealing Option: Some models are available with rubber seals (like LMUU) to prevent dust and debris from entering, improving longevity and reducing maintenance needs.