Product Overview

The NMT 7014 FEGA/HCP4AL is an open, universally matchable single-row super-precision hybrid ceramic angular contact ball bearing. With a 70 mm bore, 110 mm outer diameter, and 20 mm width, this bearing features an 18° contact angle (FE type) and high-speed E-type design, combined with silicon nitride (Si₃N₄) hybrid ceramic rolling elements (HC)  and a phenolic resin cage, factory-preset with Class A measured load preload (GA) . It integrates ultra-precision rotational accuracy, ultra-high-speed performance, high load capacity, and flexible arrangement capability into a single package, accommodating radial and unidirectional axial loads simultaneously.

 

The bearing offers a radial dynamic load rating of 5,265 lbf (23.4 kN) and a static load rating of 4,118 lbf (18.3 kN) . The GA universal matchable suffix indicates that this bearing features universal matchable (SU) capability – any two bearings 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 an 18° contact angle and hybrid ceramic technology, the bearing achieves a limiting speed of 28,000 r/min. The bearing weighs 0.56 kg with an operating temperature range of -30°C to 110°C.

 

Model Code Decoding – Understanding NMT 7014 FEGA/HCP4AL

Code Meaning

7014 Basic series designation, 70 mm bore (14×5 mm), 110 mm OD

FE 18° contact angle + High-speed E-type design – 18° small contact angle provides an optimized balance between speed and load capacity; E-type offers higher speed capability than equivalent B-type designs

G Single bearing (not a pre-assembled set)

A Class A measured load preload – ideal for high-speed precision applications

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

P4A Super-precision tolerance class – dimensional accuracy to ISO P4 class, running accuracy superior to P4

L Light metal cage, rolling element guided

Core Value: GA universal matchability (SU) means every NMT 7014 FEGA/HCP4AL 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 FE-type 18° contact angle + E-type high-speed design generates less frictional heat at equivalent speeds, offering higher limiting speed potential than 25° designs, with a limiting speed of 28,000 r/min. 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 -0.004 mm to 0 – these five elements work together to make this bearing a high-performance yet flexible flagship general-purpose precision bearing.

 

Core Performance Advantages

1. 18° Contact Angle (FE Type) + High-Speed E-Type Design – Optimized Balance of Speed and Load

The 18° small contact angle generates less frictional heat at equivalent speeds, offering higher limiting speed potential than 25° designs, with a limiting speed of 28,000 r/min. The E-type high-speed design optimizes internal geometry and rolling element parameters – ball diameter 9.525 mm, 25 ceramic balls per bearing – achieving an outstanding 5,265 lbf (23.4 kN) dynamic and 4,118 lbf (18.3 kN) static load rating. Compared to equivalent B-type designs, the E-type design offers higher speed capability.

 

2. Hybrid Ceramic Technology – A Leap in Ultra-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 providing excellent electrical insulation and extended service life. Combined with chrome steel rings, this achieves the perfect balance of high rigidity, high speed, and durability. The open design facilitates efficient heat dissipation and easy relubrication.

 

3. Light Metal Cage (L) – Speed and Durability Combined

The light metal cage, rolling element guided, offers an excellent strength-to-weight ratio, providing superior guidance accuracy and low friction at high speeds, contributing to reduced centrifugal forces, friction, and heat generation – a key factor in achieving the 28,000 r/min limiting speed.

 

4. Universal Matchable (GA) – One Inventory, Infinite Arrangements

GA 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

 

5. Class A Measured Load Preload – Ideal for High-Speed Precision Applications

Class A measured load preload provides precise internal contact stiffness for high-speed spindles – eliminating internal clearance, reducing vibration and noise at high speeds, while avoiding excessive temperature rise from over-preloading. This ensures stable temperature performance even at the 28,000 r/min limiting speed.

 

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

The P4A tolerance class (dimensional accuracy to ISO P4 class, running accuracy superior to P4) guarantees minimal radial runout and axial play. Bore and outside diameter tolerances are -0.004 mm to 0. The bearing comes pre-lubricated from the factory – ready to install out of the box. Operating temperature range is -30°C to 110°C.

 

7. Clear Performance Specifications

 

Parameter Value

Bore d 70 mm

Outer Diameter D 110 mm

Width B 20 mm

Contact Angle 18°

Dynamic Radial Load 5,265 lbf (23.4 kN)

Static Radial Load 4,118 lbf (18.3 kN)

Fatigue Load Limit Pu 0.56 kN

Ball Diameter Dw 9.525 mm

Ceramic Balls per Bearing 25

Limiting Speed 28,000 r/min

Distance to Pressure Point a 24.6 mm

Ball Material Silicon Nitride (Si₃N₄)

Ring Material Chrome Steel

Cage Material Light Metal Cage (L)

Seal Type Open

Tolerance Class P4A (ABEC 7)

Preload Class A (Measured Load)

Arrangement Universal Matchable (SU)

Weight 0.56 kg

Temperature Range -30°C to 110°C

Typical Applications

The NMT 7014 FEGA/HCP4AL, with its optimized 18° contact angle balance, hybrid ceramic ultra-high-speed performance, and universal matchable flexibility, covers an exceptionally wide range of high-end applications:

 

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

 

High-Speed Electric Spindles – high-speed rotary units

 

Machining Center Spindles – vertical/horizontal spindle systems

 

Aerospace Components – gyroscopes, actuators, jet engine parts

 

Medical Equipment – high-speed dental handpieces, surgical tools, medical imaging devices

 

Semiconductor Manufacturing Equipment – precision wafer processing spindles

 

Precision Instruments – measuring devices, optical equipment

 

Industrial Robots – high-precision transmission mechanisms and rotary axes

 

Important Installation Notes

✅ This bearing is universally matchable (GA) – any two bearings of the same model can be directly paired. Configurable as back-to-back (<>), face-to-face (><), or tandem (>>) arrangements.

 

✅ This bearing features an open design and comes pre-lubricated from the factory – ready to install out of the box. To achieve the 28,000 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 bearing comes with factory-preset Class A measured load preload. No additional preload adjustment is required during installation. However, ensure shaft and housing fits comply with P4A grade requirements (bore/OD tolerance -0.004 mm to 0).

 

⚠️ A single-row angular contact ball bearing can accommodate axial load in one direction only. Paired installations (DB/DF/DT) are required for bidirectional axial load capacity.

 

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

 

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

 

NMT Quality Commitment

Japan NMT (Enmutī) applies strict Japanese quality standards to every 7014 FEGA/HCP4AL bearing – 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 18° contact angle (FE type), E-type high-speed design, hybrid ceramic technology (HC), P4A precision, Class A measured load preload, and universal matchable flexibility makes this bearing the flagship general-purpose precision bearing in the NMT 7014 series – offering the perfect balance of high performance and flexible arrangement.

 

Choose NMT 7014 FEGA/HCP4AL for:

 

✅ 18° contact angle + E-type high-speed design – 28,000 r/min ultra-high-speed performance

 

✅ Hybrid ceramic technology – a leap in high-speed performance

 

✅ Light metal cage – low friction, high speed, precise guidance

 

✅ Universal matchable – one inventory, infinite arrangements

 

✅ Class A measured load preload – ideal for high-speed precision applications

 

✅ P4A super-precision running accuracy – bore/OD tolerance -0.004 mm to 0

 

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

 

✅ Factory pre-lubricated – ready to install