Product Overview

The NMT 7010 CE/HCP4ADGB is a pre-assembled duplex universally matchable super-precision hybrid ceramic angular contact ball bearing set, comprising 2 rows of bearings precision-paired in a universal matchable (SU) configuration. With a total width of 32 mm (16 mm per row × 2), a 50 mm bore, and an 80 mm outer diameter, this set features a 15° contact angle (CE type) and high-speed E-type design, combined with silicon nitride (Si₃N₄) hybrid ceramic rolling elements (HC) , a lightweight phenolic resin cage, and factory-preset Class B medium preload (GB) . It integrates ultra-high-speed performance, high load capacity, and flexible arrangement capability into a single package, accommodating radial and unidirectional axial loads simultaneously.

 

The bearing set offers a radial dynamic load rating of 25.52 kN (5,738 lbf) and a radial static load rating of 21.22 kN (4,770 lbf) . The GB universal matchable suffix indicates that this set features universal matchable (SU) capability – any two sets of the same model can be directly paired without selective shimming or additional grinding. Users can freely configure them in back-to-back (<>), face-to-face (><), or tandem (>>) arrangements. Manufactured to the P4A super-precision tolerance class with hybrid ceramic technology and Class B medium preload, the set achieves a limiting speed of 41,000 r/min. The operating temperature range is -30°C to 110°C.

 

Model Code Decoding – Understanding NMT 7010 CE/HCP4ADGB

Code Meaning

7010 Basic series designation, 50 mm bore, 80 mm OD

CE 15° contact angle + High-speed E-type design – 15° small contact angle provides ultra-high-speed low-heat operation; E-type optimizes internal geometry for higher speed capability and higher load capacity than equivalent B-type designs

HC Hybrid ceramic – rolling elements made of bearing-grade silicon nitride (Si₃N₄) 

P4A Super-precision tolerance class – dimensional accuracy to ISO P4 class (ABEC 7), running accuracy superior to P4

DGB Duplex General Arrangement + Class B preload – 2-bearing matched set with universal matchable (SU) capability, factory-preset Class B medium preload

Core Value: GB universal matchability means every NMT 7010 CE/HCP4ADGB bearing's end-face height difference and parallelism are tightly controlled, allowing any two bearings of the same model to be directly paired without selection or re-grinding. The E-type high-speed design offers higher speed capability and higher load capacity than equivalent B-type high-speed bearings. HC hybrid ceramic technology drastically reduces centrifugal forces and frictional heat at high speeds. P4A super-precision ensures bore and OD tolerances are controlled within -0.004mm to 0 – these four elements work together to make this bearing set a high-performance yet flexible general-purpose precision bearing solution.

 

Core Performance Advantages

1. Hybrid Ceramic Technology – A Leap in High-Speed Performance

Silicon nitride (Si₃N₄) ceramic balls have only 60% the density of bearing steel, drastically reducing centrifugal forces and frictional heat at high speeds. Ceramic materials also offer lower thermal expansion coefficients and higher elastic modulus, effectively suppressing geometric deformation at high speeds while improving seizure resistance and lubrication-starvation tolerance, extending bearing service life.

 

2. 15° Contact Angle (CE Type) + High-Speed E-Type Design – Ultra-High Speed and Heavy Load Combined

The 15° small contact angle generates less frictional heat at equivalent speeds. The E-type high-speed design optimizes internal geometry and rolling element parameters, significantly reducing sliding friction and churning losses at high speeds. Combined with hybrid ceramic rolling elements and a phenolic resin cage, the set achieves a limiting speed of 41,000 r/min.

 

3. Universal Matchable (GB) – One Inventory, Infinite Arrangements

GB universal matchability delivers outstanding value:

 

Simplified inventory: Stock a single model to cover DB, DF, and DT pairing needs

 

On-site flexibility: Change arrangements during commissioning based on actual load directions

 

Easy maintenance: Replace individual bearings without replacing entire matched sets

 

No shims required: Install directly to achieve design preload

 

4. High Load Capacity – High Load in Compact Space

With optimized rolling element parameters (ball diameter 7.938 mm, 21 ceramic balls per bearing), it achieves an outstanding 25.52 kN (5,738 lbf) dynamic and 21.22 kN (4,770 lbf) static load rating within a compact 32 mm total width. The set weighs only 0.456 – 0.47 kg.

 

5. Class B Medium Preload – Ideal for High-Speed Heavy-Load Applications

Class B medium preload provides "just-right" internal contact stiffness for high-speed spindles – eliminating internal clearance, reducing vibration and noise at high speeds, while providing higher system rigidity than Class A extra light preload, making it particularly suitable for heavy-load high-speed applications requiring greater stiffness.

 

6. P4A Super-Precision Grade – Micron-Level Accuracy

The P4A tolerance class (ABEC 7) guarantees minimal radial runout and axial play. Bore and outside diameter tolerances are -0.004mm to 0, meeting stringent surface quality and dimensional consistency requirements. Operating temperature range is -30°C to 110°C.

 

7. Lightweight Phenolic Resin Cage

The lightweight high-strength phenolic resin cage provides excellent guidance accuracy and low friction at high speeds, contributing to reduced centrifugal forces, friction, and heat generation – a key factor in achieving the 41,000 r/min limiting speed.

 

8. Clear Performance Specifications

 

Parameter Value

Bore d 50 mm

Outer Diameter D 80 mm

Total Width B 32 mm (2×16 mm)

Contact Angle 15°

Dynamic Radial Load 25.52 kN (5,738 lbf)

Static Radial Load 21.22 kN (4,770 lbf)

Ball Diameter Dw 7.938 mm

Balls per Bearing 21

Limiting Speed 41,000 r/min

Ball Material Silicon Nitride (Si₃N₄)

Ring Material Chrome Steel

Cage Material Phenolic

Seal Type Open

Tolerance Class P4A (ABEC 7)

Preload Class B (Medium)

Arrangement Universal Matchable (SU)

Bearings in Set 2

Weight 0.456 – 0.47 kg

Temperature Range -30°C to 110°C

Typical Applications

The NMT 7010 CE/HCP4ADGB, with its hybrid ceramic high-speed performance, E-type high-speed design, and universal matchable flexibility, covers an exceptionally wide range of high-end applications:

 

High-Speed Machine Tool Spindles – CNC machine tools, precision grinders, milling center spindles

 

High-Speed Electric Spindles – high-speed rotary units

 

Machining Center Spindles – vertical/horizontal spindle systems

 

Precision Rotary Tables – high-accuracy rotary positioning

 

Aerospace Components – gyroscopes, actuators, jet engine parts

 

Medical Equipment – high-speed dental drills and medical imaging devices

 

Semiconductor Manufacturing Equipment – precision wafer processing spindles

 

Industrial Robots – high-precision transmission mechanisms and rotary axes

 

Photovoltaic and Mold Industries – high-precision machining equipment

 

Important Installation Notes

✅ This bearing set is universally matchable (GB) – any two sets of the same model can be directly paired.

 

✅ This set is open design – select appropriate lubrication method based on application. To achieve the 41,000 r/min limiting speed, oil-air or oil-mist lubrication is recommended.

 

✅ For paired installations, using bearings from the same production batch is recommended for optimal consistency.

 

⚠️ This set comes with factory-preset Class B medium preload. No additional preload adjustment is required during installation. However, ensure shaft and housing fits comply with P4A grade requirements (bore/OD tolerance -0.004mm to 0).

 

⚠️ Hybrid ceramic bearings are more sensitive to installation shock. Heat mounting or hydraulic installation methods are recommended – avoid impact on raceways or rolling elements.

 

⚠️ Ensure the contact angle direction matches the intended load direction – incorrect orientation will eliminate load capacity.

 

NMT Quality Commitment

Japan NMT (Enmutī) applies strict Japanese quality standards to every 7010 CE/HCP4ADGB bearing set – from ring material (high-purity chrome steel), ceramic balls (HIP silicon nitride), to superfinishing processes. End-face height difference, parallelism, and contact angle deviation of each bearing are tightly controlled to ensure universal matchability consistency across any two bearings of the same model. The combination of 15° contact angle (CE type), E-type high-speed design, hybrid ceramic technology (HC), P4A precision, Class B medium preload, and universal matchable flexibility makes this bearing set the flagship general-purpose precision bearing solution in the NMT 7010 series – offering the perfect balance of high performance, high rigidity, and flexible arrangement.

 

Choose NMT 7010 CE/HCP4ADGB for:

 

✅ Hybrid ceramic technology – 41,000 r/min ultra-high-speed performance

 

✅ E-type high-speed design – high speed and heavy load combined

 

✅ Universal matchable – one inventory, infinite arrangements

 

✅ 15° contact angle – ultra-high-speed low-heat operation

 

✅ Class B medium preload – ideal for high-speed heavy-load applications

 

✅ P4A super-precision running accuracy

 

✅ Steel rings + ceramic balls – high rigidity, high speed, cost-effectiveness

 

✅ Factory pre-matched – ready to install