Overview of R188 Bearing
The R188 miniature ball bearing is a compact, high-precision bearing widely used in applications that require smooth rotation, low friction, and reliable performance in limited space. With a bore diameter of 0.25 inch (6.35 mm) and an outer diameter of 0.5 inch (12.7 mm), the R188 offers an excellent balance between size and load-handling capacity.
Key specifications of R188 Bearing:
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Bore (Inner Diameter): 0.25 inch (6.35 mm)
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Outer Diameter: 0.5 inch (12.7 mm)
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Width: 0.125 inch (3.175 mm)
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Ball Material: Chrome Steel (AISI 52100) or optional Stainless Steel
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Shield/Seal Options: Open, Shielded (Z), or Sealed (RS) depending on application
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Design Type: Deep Groove Ball Bearing
This bearing is engineered for low noise, high-speed operation, and long service life, making it a popular choice for both industrial and consumer-grade precision devices.
Applications of R188 Bearing
Due to its compact size and precision tolerances, the R188 bearing is commonly used in:
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Medical devices – dental tools, pumps, surgical equipment
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Robotics – servo motors, gimbals, micro-actuators
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Aerospace & defense – navigation instruments, control systems
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Electronics & computing – hard drives, cooling fans, miniature motors
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Instrumentation & measurement devices – sensors, precision gauges
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Consumer products – performance yo-yos, fidget spinners, hobby models
Its versatility across industries comes from its ability to operate smoothly at high RPM while maintaining stability under light to moderate loads.
Maintenance & Care Tips for R188 Bearing
To maximize the performance and lifespan of your R188 miniature bearing:
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Regular Inspection: Check for signs of wear, noise, or misalignment.
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Cleaning: Use a non-corrosive solvent for cleaning; ensure complete drying before re-lubrication.
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Lubrication: Apply the correct lubricant (light oil or grease) depending on speed and load requirements.
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Replacement: If excessive vibration, heat, or visible damage occurs, replace the bearing promptly to prevent equipment failure.
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Operating Conditions: Always ensure the bearing is used within its rated speed, load, and environmental limits.
Proper care helps ensure stable operation, reduced downtime, and longer service life in demanding applications.
Why Choose R188 Bearings from [Your Brand/Company]
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Manufactured to strict precision standards (ABEC ratings available)
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Available in chrome steel or stainless steel for different environments
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Options for open, shielded, or sealed designs to fit application needs
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Competitive pricing with reliable supply for both OEM and replacement use
Whether you need bulk orders for manufacturing or individual replacements, the R188 bearing provides consistent performance in compact, high-precision systems.
