Small Size Open Deep Groove Ball Bearing R188 6.35×12.7×3.18mm for Precision Machinery

Product Specifications

Application Industries

Eliminate Downtime with Reliable R188 Deep Groove Ball Bearings

Equipment failures from low-quality small ball bearings cost manufacturers thousands in lost production. When precision machinery relies on components like the 6.35×12.7×3.18mm bearing, even minor dimensional errors or material defects lead to premature wear, excessive noise, and unplanned shutdowns. Sourcing from uncertified suppliers often means inconsistent quality, long lead times, and no technical support when problems arise.

Engineered for Precision Machinery Performance

Our R188 deep groove ball bearing solves these challenges with decades of manufacturing expertise backing every unit. As a professional integrated bearing supplier, we produce this small size deep groove ball bearing to strict P0-P4 precision grades, ensuring it meets the tight tolerance requirements of precision machinery. With automated production lines and in-house testing, we guarantee consistent performance across every batch—whether you need 1 piece for emergency repairs or bulk orders for production runs.

Optimal Performance in Compact Applications

The R188 bearing’s 6.35mm bore diameter and 12.7mm outer diameter make it ideal for space-constrained equipment where precision and durability are critical. Its open design allows for easy lubrication maintenance, while the Z2-Z4 noise grade options ensure quiet operation in sensitive environments like medical devices and office equipment. Whether operating at moderate speeds in home appliance motors or handling continuous duty in industrial components, this bearing delivers reliable rotation under varying load conditions.

Technical Excellence That Drives Reliability

Our R188 precision machinery bearing incorporates key engineering features that directly impact performance. The available precision grades (P0-P4) control radial and axial runout, with P4 grade offering sub-micron accuracy for high-precision applications. Clearance options (C0, C3, C4) allow customization for thermal expansion needs—C3 and C4 clearances accommodate higher operating temperatures without compromising rotation smoothness. Manufactured with high-grade chrome steel, the bearing maintains structural integrity under cyclic loads, extending service life in continuous-operation equipment.

Why Quality Matters More Than Price for Small Bearings

Choosing an inferior R188 bearing to save costs often leads to higher total expenses. Counterfeit or low-quality versions typically use substandard steel, resulting in 30-50% shorter service life and increased vibration that damages adjacent components. Our bearings, certified to ISO 9001:2015 standards, undergo full-process quality control—from raw material inspection to dimensional testing and noise/vibration analysis. This rigorous process ensures each bearing meets ABMA and DIN international standards, reducing the risk of unexpected failures and unplanned maintenance.

Your Trusted Partner for Precision Bearings

Packaging & Shipping

• Protective carton packaging with palletized bulk options
• Sample orders shipped within 3-5 working days
• Bulk orders delivered in 5-15 working days
• Multiple logistics options including express and sea freight
• 1 piece MOQ available for standard bearings

Get Your R188 Bearing Today

Don’t let equipment downtime affect your production schedule. Whether you need a single R188 bearing for emergency repair or a bulk order for your manufacturing line, we ensure fast delivery and consistent quality. Send your requirements now to receive a personalized quote within 24 hours.

Frequently Asked Questions