MR85ZZ Ball Bearing – Miniature Bearing 5x8x2.5mm Shielded High Precision Ball Bearing

MR85ZZ Miniature Ball Bearing – High Precision 5x8x2.5mm Shielded Bearing

The MR85ZZ miniature bearing is a high-precision deep groove ball bearing with metal shields (ZZ type) on both sides, designed to keep out dust, dirt, and contaminants while maintaining smooth operation.

• With dimensions 5mm (inner bore) × 8mm (outer diameter) × 2.5mm (width), this compact ball bearing is lightweight yet durable, ideal for small mechanical assemblies, precision tools, and hobby projects where low friction and high RPM performance are required.
• The double shielded MR85ZZ bearing comes pre-lubricated with grease, ensuring long service life, smooth rotation, and protection in both radial and limited axial load applications.

Specifications – MR85ZZ Miniature Bearing

• Type: Deep Groove Ball Bearing
• Bore Size (ID): 5mm
• Outer Diameter (OD): 8mm
• Width: 2.5mm
• Shield Type: ZZ (Double Metal Shielded) – non-contact shields
• Material: High Carbon Chrome Steel (GCr15)
• Cage Material: Steel Retainer
• Lubrication: Pre-lubricated with grease (maintenance-free)
• Precision Grade: ABEC-3 / ABEC-5 (depending on manufacturer)
• Dynamic Load Rating: ~365 N
• Static Load Rating: ~132 N
• Maximum Speed: Up to 60,000 RPM (grease lubricated)
• Operating Temp Range: -20°C to +120°C
• Weight: ~0.5 – 0.7 grams

Applications – MR85ZZ Miniature Bearings

• The MR85ZZ shielded ball bearing is widely used in:
  • 3D Printers – extruders, idler pulleys, stepper motors
  • RC Cars & Drones – hobby motors, wheel hubs, gearboxes
  • Miniature Electric Motors – high RPM motor shafts
  • Robotics & Automation – compact actuators, servo mechanisms
  • Office Equipment – scanners, cooling fans, printers
  • Medical Devices – precision instruments, small pumps
  • Model Engineering & DIY Projects – robotics kits, micro gearboxes

Package Includes

• 1 × MR85ZZ Miniature Ball Bearing