[2] ntn (World Integrated Precision Machinery Manufacturing Company) - wikipedia
[6] Deep groove ball bearings 6306 6307 6308 6309 deep groove ball bearing
[8] What brand is NTN bearings?
Designed for high-speed rotation and moderate radial/axial loads, these bearings are widely used in motors, bicycles, and industrial machinery.
| Model | Inner Diameter (mm) | Outer Diameter (mm) | Width (mm) | Dynamic Load (kN) | Static Load (kN) | Max Speed (rpm) |
|---|---|---|---|---|---|---|
| 697Z | 7 | 17 | 5 | 2.15 | 0.95 | 34,000 |
| 698Z | 8 | 19 | 6 | 2.80 | 1.30 | 30,000 |
| 699Z | 9 | 20 | 6 | 3.10 | 1.50 | 28,000 |
Optimised for CNC spindle units, conveyor systems, and robotic arms requiring precision under 0.005mm radial runout.
Reduces energy loss by 12-15% compared to standard bearings, with noise levels below 45dB at 20,000rpm.
Supports pedal axles and gear hubs with IP54 dust/water resistance for all-weather cycling.
Z-type steel shields increase service life by 30% versus open-type bearings in abrasive environments.
ABEC-3 tolerance grade maintains positional accuracy within ±0.0025mm.
698Z bearings enabled 24/5 operation in aluminium milling with 98.7% uptime over 18 months.
699Z units withstand 250W motor vibrations while maintaining 0.03mm axial play for 15,000km.
Challenge. Frequent bearing seizures in turbocharger test rigs at 80°C+ temperatures.
Solution. 697Z bearings with high-temperature grease (180°C rating).
Result. 400% MTBF improvement, saving €72,000/year in maintenance.
Challenge. 23% failure rate in wheel hubs within 6 months.
Solution. 698Z bearings with enhanced sealing.
Result. 0 field failures in 15,000 units over 12 months.
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