686B-2ZMC3 / 686-2ZC3 / 686ZZ Miniature Deep Groove Ball Bearing with Metal

686ZZ, 686-2ZC3 and 686B-2ZMC3 belong to the same 686 thin-wall miniature bearing series with unified installation dimension 6×13×5mm, differing only in structural suffix, internal clearance and cage marking code.

• 686ZZ: Standard double-sided non-contact metal ZZ dust shield, CN normal internal clearance, general standard model
• 686-2ZC3: Double ZZ metal shields + C3 enlarged radial clearance, reserved for long-running high-speed miniature spindles
• 686B-2ZMC3: Double ZZ shield, C3 clearance, upgraded reinforced B-type stamped steel cage, optimized internal assembly tolerance for precision high-load micro equipment

All variants adopt non-contact thin steel shield design with ultra-low rotational friction and excellent heat dissipation compared to rubber sealed bearings. Mirror superfinished raceway and precision steel balls support stable ultra-high-speed continuous operation under light radial loads. C3 clearance version compensates thermal expansion of tiny high-speed shafts to avoid bearing seizure after long-hour operation. Widely used for RC drone micro motors, beauty massage equipment, 3D printer guide rollers, small cooling fans, medical testing instruments and miniature automation transmission assemblies.

Get a quote within 24 hours for your miniature equipment spare parts bulk order

Complete CAD dimension drawings and micro equipment fitment list can be provided upon request

1. Three model variants share identical 6×13×5mm installation size, only differ in cage structure and clearance grade, satisfy general dust-proof, high-speed heat expansion and precision light heavy-load demands in one complete series.
2. Non-contact metal ZZ dust shield creates tiny labyrinth gap between shield and inner ring, drastically reduce rotation friction loss and guarantee superior heat dissipation for long-hour continuous high-speed micro motor operation.
3. C3 enlarged clearance design for 686-2ZC3 & 686B-2ZMC3 offsets thermal expansion of miniature high-speed spindles, effectively eliminate bearing locking, rotation lag and abnormal noise caused by temperature rise.
4. Upgraded reinforced B-type cage on 686B-2ZMC3 improves structural stability, avoids cage deformation under frequent start-stop alternating loads, ideal for precision testing and model power equipment.
5. Ultra-smooth mirror superfinished inner/outer raceway and precision steel ball surface cut vibration and noise drastically, maintain silent stable running for beauty instruments, optical measuring devices and RC models.
6. Ultra-thin wall lightweight structure occupies minimal installation space, perfectly matches compact narrow-shaft micro equipment with strict volume and weight limits.
7. Stable quenching & tempering heat treatment for GCr15 steel provides outstanding anti-fatigue performance, withstand frequent start-stop alternating light loads of miniature drive motors.
8. Support customized clearance grade, high-speed low-viscosity special grease, OEM laser marking and neutral vacuum anti-rust packaging for global miniature machinery spare parts distributors.

Reduce precision micro equipment downtime and lower overall production maintenance expenses

This 686 series 6×13×5mm thin wall miniature metal shield bearing is widely suitable for:

• RC drone, remote control car, model aircraft micro drive high-speed motors
• Facial massage guns, beauty skin care vibration equipment, portable beauty instruments
• 3D printer extruder and guide roller miniature transmission shafts
• Notebook cooling fans, small blower ventilation micro rotary components
• Medical analytical testing instruments, optical precision measuring equipment
• Miniature gear reducers, small stepping motors, household mini power tools
• Equipment repair shops and global micro industrial spare parts wholesale suppliers

Model selection guidance:

• 686ZZ: General indoor light dust environment, medium speed miniature motors
• 686-2ZC3: Long continuous running high-speed spindles prone to temperature rise
• 686B-2ZMC3: Precision equipment with frequent start-stop and slight alternating loads

Ideal compact replacement bearing for overhaul of high-speed light-load miniature precision equipment

• Over 25 years professional manufacturing experience of 686 series thin wall miniature deep groove ball bearings
• Strictly comply with international miniature bearing dimensional tolerance standards, 100% interchangeable with original 686ZZ / 686-2ZC3 / 686B-2ZMC3 bearings
• Complete production workflow covering steel forging, heat treatment, precision raceway grinding and finished noise & ultra-high-speed durability testing
• Sufficient spot stock for three 686 series variants, fast shipment for bulk micro equipment spare parts orders
• Professional engineering team provides miniature shaft press-fit installation guidance and clearance & cage type selection suggestions
• Products exported to more than 50 countries, stable long-term supply for precision electronics, beauty equipment and model aftermarket suppliers

We supply low-friction high-speed thin wall miniature metal shield bearings for compact micro motor and automation equipment

1. Raw bearing steel chemical composition and hardness inspection before processing
2. CNC inner/outer ring turning, raceway precision grinding and mirror superfinishing procedure
3. Constant temperature quenching & tempering heat treatment to stabilize internal material stress
4. Full finished product testing: internal clearance, rotation noise, rotational flexibility, ultra-high-speed endurance and light alternating load fatigue test
5. Full dimensional tolerance inspection for inner ring, outer ring and width plus visual appearance scratch check
6. Anti-rust oil coating + independent vacuum packaging to avoid rust during long-distance sea transportation

Every batch of 686 miniature bearings passes full inspection before shipment to guarantee stable precision micro equipment operation

Looking for wholesale 686ZZ, 686-2ZC3 and 686B-2ZMC3 thin wall miniature metal shield bearings 6×13×5mm?
Send your inquiry to obtain:

• Competitive factory direct bulk unit price for CN standard ZZ, C3 clearance and reinforced B cage versions
• Complete RC model / beauty device / micro motor equipment fitment checklist
• Custom clearance grade, high-speed special grease and OEM laser marking packaging solutions
• Technical support for miniature shaft bearing press-fit installation and high-speed noise troubleshooting

Detailed dimension catalog and real-time stock availability can be checked upon contact