Miniature ball bearings
When equipment operates at ultra-high speeds, under harsh temperature conditions, and in demanding precision applications, miniature ball bearings become a crucial component of reliability. The combination of NTE’s compact parts and high mechanical endurance sets new performance standards for precision systems.
Size range
- Bore diameter: from 3 to 9 mm (larger sizes on request)
- Outside diameter: from 9 to 26 mm
- Bearing width: from 3 to 11 mm
This range enables NTE bearings to be integrated into various mechanisms – from small electric motors to measuring equipment.
Design and operating principle
NTE miniature bearings feature a carefully engineered design:
- Inner and outer rings for stable rotation without vibration. These have rolling tracks with a special shape that reduces local contact stresses and distributes the load evenly across the balls.
- High-quality balls for smoothness and precision. Precision-grade G10 rolling elements reduce friction, enable smooth start-up, and minimize noise during operation.
- Cage selection tailored to meet your application requirements. Materials are selected based on the application – steel for high strength, impact and temperature resistance; polyamide for quiet rotation, reduced friction, and safe operation under limited lubrication; heat-resistant polymer for low weight and minimal inertial loads.
- Effective protection. To ensure effective and long-lasting bearing operation in contaminated environments, NTE offers models with metal shields (ZZ) or contact rubber seals (RS, 2RS).
Technical specifications
Due to European manufacturing standards and strict quality control, NTE bearings assure reliable operation of equipment even under extreme loads and variable operating conditions:
- Maximum rotational speed – up to 80,000 rpm. Small rolling elements reduce inertia, minimizing heat generation and allowing operation at speeds unattainable for standard bearings.
- Operating temperature range: from -30°C to +120°C (with rubber seals up to +100°C, briefly +120°C), suitable for systems with elevated thermal conditions and equipment operating in cold environments.
- Basic dynamic load rating – up to 4.75 kN. High-strength raceways ensure extended service life even under cyclic loading.
Industrial advantages
The main advantage is the precise operation of tiny bearings in compact and high-speed assemblies. This is achieved due to the following technical features:
- Compatibility with other brands – ISO-standardized dimensions allow for easy replacement of other brands' equivalents.
- Support for various lubricants types – including high-speed and low-temperature ones.
- Easy integration into precision assemblies – bearings are suitable for various mechanisms due to their standardized dimensions and precise tolerances.
- Long service life under cyclic loads – withstanding frequent start-stop cycles without performance degradation.
- Quiet operation – due to reduced weight, micron-precision grinding, and low friction coefficient.
These advantages make miniature bearings practical, efficient, and cost-effective for industrial applications.
Fields of application
For many years, NTE has been supplying miniature bearing wholesale for a wide range of applications:
- Small electric motors.
- Sensors, detectors, and encoders.
- Compact gearboxes and gear transmissions.
- Instrumentation and measuring systems.
- Agricultural machinery – small drives, dosing units, pumps, and auxiliary mechanisms.
Miniature bearings are a vital component of many modern devices, particularly those requiring high speed.
Miniature ball bearings types
NTE manufactures all commonly used types for various applications:
- Single-row bearings – compact and lightweight, providing smooth rotation under low and medium loads.
- Double-row bearings – the two rows of balls allow them to withstand higher axial and radial loads, increasing durability during intensive operation.
- Special bearings for magnetos – optimized for engine systems requiring high precision and vibration resistance.
Why choose NTE
- Stable supply – reduced waiting times.
- Quality assurance – certified products and multi-stage inspection.
- Flexible terms of cooperation – the option to buy bearings wholesale, discounts, and tailored offers.
- Extensive product range – multiple sizes and designs available.
These small components ultimately determine whether your equipment operates without failure. Buy miniature bearings from NTE – stop worrying about production downtime.
Designations and dimensions
Miniature ball bearings are designed for compact assemblies, and the low mass of their balls makes them suitable for high rotational speeds. NTE offers them with bore diameters from 3 to 9 mm and outside diameters up to 26 mm: open, with metal shields or with rubber seals.
| Designation | dmm | Dmm | Bmm | CkN | C₀kN | n lim.r/min | n ref.r/min | Masskg |
|---|---|---|---|---|---|---|---|---|
| 3 | 10 | 4 | 0,54 | 0,18 | 80 000 | 130 000 | 0,0015 | |
| 3 | 10 | 4 | 0,54 | 0,18 | 40 000 | – | 0,0015 | |
| 3 | 10 | 4 | 0,54 | 0,18 | 63 000 | 130 000 | 0,0015 | |
| 3 | 10 | 4 | 0,54 | 0,18 | 40 000 | – | 0,0015 | |
| 4 | 9 | 4 | 0,54 | 0,18 | 70 000 | 140 000 | 0,001 | |
| 4 | 9 | 4 | 0,54 | 0,18 | 70 000 | 140 000 | 0,0013 | |
| 4 | 11 | 4 | 0,715 | 0,232 | 80 000 | 130 000 | 0,0017 | |
| 4 | 11 | 4 | 0,715 | 0,232 | 63 000 | 130 000 | 0,0017 | |
| 4 | 12 | 4 | 0,806 | 0,28 | 75 000 | 120 000 | 0,0021 | |
| 4 | 12 | 4 | 0,806 | 0,28 | 60 000 | 120 000 | 0,0021 | |
| 4 | 12 | 4 | 0,806 | 0,28 | 60 000 | 120 000 | 0,0021 | |
| 4 | 13 | 5 | 0,936 | 0,29 | 67 000 | 110 000 | 0,0031 | |
| 4 | 13 | 5 | 0,936 | 0,29 | 53 000 | 110 000 | 0,0031 | |
| 4 | 13 | 5 | 0,936 | 0,29 | 67 000 | 110 000 | 0,0031 | |
| 4 | 16 | 5 | 1,11 | 0,38 | 60 000 | 95 000 | 0,0054 | |
| 4 | 16 | 5 | 1,11 | 0,38 | 28 000 | – | 0,0054 | |
| 4 | 16 | 5 | 1,11 | 0,38 | 48 000 | 95 000 | 0,0054 | |
| 4 | 16 | 5 | 1,11 | 0,38 | 28 000 | – | 0,0054 | |
| 4 | 16 | 5 | 1,11 | 0,38 | 60 000 | 95 000 | 0,0054 | |
| 5 | 11 | 3 | 0,637 | 0,255 | 75 000 | 120 000 | 0,0012 | |
| 5 | 11 | 4 | 0,637 | 0,255 | 60 000 | 120 000 | 0,0014 | |
| 5 | 11 | 5 | 0,637 | 0,255 | 60 000 | 120 000 | 0,0016 | |
| 5 | 13 | 4 | 0,884 | 0,34 | 67 000 | 110 000 | 0,0025 | |
| 5 | 13 | 4 | 0,884 | 0,34 | 53 000 | 110 000 | 0,0025 | |
| 5 | 16 | 5 | 1,14 | 0,38 | 60 000 | 95 000 | 0,005 | |
| 5 | 16 | 5 | 1,14 | 0,38 | 28 000 | – | 0,005 | |
| 5 | 16 | 5 | 1,14 | 0,38 | 48 000 | 95 000 | 0,005 | |
| 5 | 16 | 5 | 1,14 | 0,38 | 60 000 | 95 000 | 0,005 | |
| 5 | 19 | 6 | 2,34 | 0,95 | 50 000 | 80 000 | 0,009 | |
| 5 | 19 | 6 | 2,34 | 0,95 | 24 000 | – | 0,009 | |
| 5 | 19 | 6 | 2,34 | 0,95 | 40 000 | 80 000 | 0,009 | |
| 5 | 19 | 6 | 2,34 | 0,95 | 24 000 | – | 0,009 | |
| 5 | 19 | 6 | 2,34 | 0,95 | 50 000 | 80 000 | 0,009 | |
| 6 | 17 | 6 | 2,26 | 0,835 | 48 000 | 95 000 | 0,006 | |
| 6 | 17 | 6 | 2,26 | 0,835 | 31 000 | – | 0,006 | |
| 6 | 13 | 4 | 0,884 | 0,345 | 67 000 | 110 000 | 0,002 | |
| 6 | 13 | 5 | 0,884 | 0,345 | 53 000 | 110 000 | 0,0026 | |
| 6 | 15 | 5 | 1,24 | 0,475 | 63 000 | 100 000 | 0,0039 | |
| 6 | 15 | 5 | 1,24 | 0,475 | 50 000 | 100 000 | 0,0039 | |
| 6 | 15 | 5 | 1,24 | 0,475 | 50 000 | 100 000 | 0,0039 | |
| 6 | 19 | 6 | 2,34 | 0,95 | 50 000 | 80 000 | 0,0084 | |
| 6 | 19 | 6 | 2,34 | 0,95 | 40 000 | 80 000 | 0,0084 | |
| 6 | 19 | 6 | 2,34 | 0,95 | 24 000 | – | 0,0084 | |
| 6 | 19 | 6 | 2,34 | 0,95 | 50 000 | 80 000 | 0,0084 | |
| 7 | 14 | 4 | 0,956 | 0,4 | 63 000 | 100 000 | 0,0022 | |
| 7 | 14 | 5 | 0,956 | 0,4 | 50 000 | 100 000 | 0,0031 | |
| 7 | 17 | 5 | 1,48 | 0,56 | 56 000 | 90 000 | 0,0049 | |
| 7 | 17 | 5 | 1,48 | 0,56 | 45 000 | 90 000 | 0,0049 | |
| 7 | 19 | 6 | 2,34 | 0,95 | 53 000 | 85 000 | 0,0075 | |
| 7 | 19 | 6 | 2,34 | 0,95 | 24 000 | – | 0,0075 | |
| 7 | 19 | 6 | 2,34 | 0,95 | 43 000 | 85 000 | 0,0075 | |
| 7 | 19 | 6 | 2,34 | 0,95 | 24 000 | – | 0,0075 | |
| 7 | 19 | 6 | 2,34 | 0,95 | 53 000 | 85 000 | 0,0075 | |
| 7 | 22 | 7 | 3,45 | 1,37 | 45 000 | 70 000 | 0,013 | |
| 7 | 22 | 7 | 3,45 | 1,37 | 22 000 | – | 0,012 | |
| 7 | 22 | 7 | 3,45 | 1,37 | 36 000 | 70 000 | 0,013 | |
| 7 | 22 | 7 | 3,45 | 1,37 | 22 000 | – | 0,012 | |
| 7 | 22 | 7 | 3,45 | 1,37 | 45 000 | 70 000 | 0,013 | |
| 8 | 16 | 4 | 1,33 | 0,57 | 56 000 | 90 000 | 0,003 | |
| 8 | 16 | 5 | 1,33 | 0,57 | 26 000 | – | 0,0036 | |
| 8 | 16 | 5 | 1,33 | 0,57 | 45 000 | 90 000 | 0,0036 | |
| 8 | 16 | 6 | 1,33 | 0,57 | 45 000 | 90 000 | 0,0043 | |
| 8 | 19 | 6 | 2,34 | 0,95 | 43 000 | 85 000 | 0,0072 | |
| 8 | 19 | 6 | 2,34 | 0,95 | 53 000 | 85 000 | 0,0072 | |
| 8 | 19 | 6 | 1,9 | 0,74 | 50 000 | 80 000 | 0,0071 | |
| 8 | 19 | 6 | 1,9 | 0,74 | 24 000 | – | 0,0071 | |
| 8 | 19 | 6 | 1,9 | 0,74 | 40 000 | 80 000 | 0,0071 | |
| 8 | 22 | 7 | 3,45 | 1,37 | 48 000 | 75 000 | 0,012 | |
| 8 | 22 | 7 | 3,45 | 1,37 | 22 000 | – | 0,012 | |
| 8 | 22 | 7 | 3,45 | 1,37 | 38 000 | 75 000 | 0,012 | |
| 8 | 22 | 7 | 3,45 | 1,37 | 22 000 | – | 0,012 | |
| 8 | 22 | 7 | 3,45 | 1,37 | 48 000 | 75 000 | 0,012 | |
| 8 | 22 | 11 | 3,45 | 1,37 | 22 000 | – | 0,016 | |
| 8 | 24 | 8 | 3,9 | 1,66 | 40 000 | 63 000 | 0,017 | |
| 8 | 24 | 8 | 3,9 | 1,66 | 19 000 | – | 0,017 | |
| 8 | 24 | 8 | 3,9 | 1,66 | 32 000 | 63 000 | 0,017 | |
| 8 | 24 | 8 | 3,9 | 1,66 | 19 000 | – | 0,017 | |
| 8 | 24 | 8 | 3,9 | 1,66 | 40 000 | 63 000 | 0,017 | |
| 9 | 17 | 4 | 1,43 | 0,64 | 53 000 | 85 000 | 0,0034 | |
| 9 | 17 | 5 | 1,43 | 0,64 | 24 000 | – | 0,0043 | |
| 9 | 17 | 5 | 1,43 | 0,64 | 43 000 | 85 000 | 0,0043 | |
| 9 | 17 | 5 | 1,43 | 0,64 | 53 000 | 85 000 | 0,0043 | |
| 9 | 20 | 6 | 2,08 | 0,87 | 48 000 | 80 000 | 0,0076 | |
| 9 | 20 | 6 | 2,08 | 0,87 | 38 000 | 80 000 | 0,0076 | |
| 9 | 24 | 7 | 3,9 | 1,66 | 43 000 | 70 000 | 0,014 | |
| 9 | 24 | 7 | 3,9 | 1,66 | 19 000 | – | 0,014 | |
| 9 | 24 | 7 | 3,9 | 1,66 | 34 000 | 70 000 | 0,014 | |
| 9 | 24 | 7 | 3,9 | 1,66 | 19 000 | – | 0,014 | |
| 9 | 24 | 7 | 3,9 | 1,66 | 43 000 | 70 000 | 0,014 | |
| 9 | 26 | 8 | 4,75 | 1,96 | 38 000 | 60 000 | 0,02 | |
| 9 | 26 | 8 | 4,75 | 1,96 | 19 000 | – | 0,02 | |
| 9 | 26 | 8 | 4,75 | 1,96 | 30 000 | 60 000 | 0,02 | |
| 9 | 26 | 8 | 4,75 | 1,96 | 19 000 | – | 0,02 | |
| 9 | 26 | 8 | 4,75 | 1,96 | 38 000 | 60 000 | 0,02 |
Take advantage of favorable terms and support - become an NTE distributor today!
We offer bearings compliant with international quality standards. NTE products are manufactured at certified facilities, undergo strict inspection, and combine durability, precision, and stable performance. Their high quality is confirmed by experience in automotive, electrical engineering, machine building, and metallurgical industries.
What we offer distributors:
- Professional technical support
- Certificates & documentation
- Special purchase prices
- Convenient terms of cooperation
- Ongoing support
- Easy interaction
Contact us by email – become an NTE partner today!