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
- For example, for a shaft diameter of 8mm (LM8UU):
- 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.
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