635 Deep Groove Ball Bearing (ZrO2)

635 Deep Groove Ball Bearing (ZrO₂ – Full Ceramic)

Description:
The 635 deep groove ball bearing is a single-row radial bearing designed for high-precision and high-speed applications. This specific model is manufactured from Zirconium Dioxide (ZrO₂) , a technical-grade ceramic material that offers superior performance over standard steel bearings in demanding environments.

Dimensions (Metric):

• Bore (d): 5 mm

• Outer Diameter (D): 19 mm

• Width (B): 6 mm

Material Specifications:

• Rings & Balls: ZrO₂ (Zirconia Ceramic) – High fracture toughness, thermal shock resistance, and white in color.

• Cage (Retainer): PEEK (Polyether Ether Ketone), PTFE, or PA66 (depending on application) – chosen for low friction and chemical resistance.

• Lubrication: Available as dry (no lubricant), oil-lubricated, or grease-lubricated (food-grade or high-vacuum compatible options available).

Key Advantages (vs. Standard 635 Steel Bearings):

1. Corrosion Resistance: ZrO₂ is chemically inert. It is fully resistant to acids, alkalis, salt water, and most aggressive chemical solvents, making it ideal for chemical processing and marine environments.

2. High Temperature Operation: Capable of operating continuously between -40°C to +300°C (-40°F to 572°F) without loss of dimensional stability.

3. Electrical Insulation: As a non-conductive ceramic, this bearing provides 100% electrical arc resistance (prevents electrical pitting damage in motors and generators).

4. Magnetic Resonance (MR) Compatibility: Completely non-magnetic, suitable for MRI machines and sensitive electronic equipment.

5. Low Density & Speed: Lighter than steel (approx. 60% of steel weight), reducing centrifugal force and allowing for higher rotational speeds with lower friction torque.

Applications:

• Chemical pumps and valves

• Semiconductor manufacturing equipment

• Medical devices (MRI, CT scanners, dental handpieces)

• Food processing machinery (allows for operation without oil/grease to prevent contamination)

• Vacuum environments (e.g., aerospace, coating systems)