Product Overview

The NMT 7014 CEGA/P4A is a sealed, universally matchable single-row super-precision angular contact ball bearing. With a 70 mm bore, 110 mm outer diameter, and 20 mm width, this bearing features a 15° contact angle (CE type) and high-speed E-type design, combined with all-steel rolling elements and a phenolic resin cage, factory-preset with Class A measured load preload (GA) , and equipped with non-contact rubber seals on both sides. It integrates ultra-precision rotational accuracy, ultra-high-speed performance, maintenance-free sealing, and flexible arrangement capability into a single package, accommodating radial and unidirectional axial loads simultaneously.

 

The bearing offers a basic dynamic load rating of 23.8 kN and a static load rating of 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 E-type high-speed design and Class A preload, the bearing achieves a limiting speed of 17,000 r/min under grease lubrication and 27,000 r/min under oil-air lubrication. The operating temperature range is -30°C to 110°C. The bearing weighs 0.61 – 0.64 kg.

 

Model Code Decoding – Understanding NMT 7014 CEGA/P4A

Code Meaning

7014 Basic series designation, 70 mm bore, 110 mm OD

CE 15° contact angle + High-speed E-type design – 15° small contact angle balances high speed and high load capacity; E-type offers higher speed capability and can accommodate heavier loads than equivalent B-type high-speed bearings

G Single bearing (not a pre-assembled set)

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

P4A Super-precision tolerance class – dimensional accuracy to ISO Class 4, geometrical tolerances in accordance with SKF internal tolerances

Seals Non-contact rubber seals on both sides

Core Value: GA universal matchability means every NMT 7014 CEGA/P4A 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 CE-type 15° contact angle + E-type high-speed design offers higher speed capability and can accommodate heavier loads than equivalent B-type high-speed bearings. P4A super-precision ensures bore and OD tolerances are controlled within extremely narrow ranges. The non-contact seals effectively prevent contaminant ingress, extending bearing service life – these four elements work together to make this bearing a high-performance yet easy-to-use flagship general-purpose precision bearing.

 

Core Performance Advantages

1. Non-Contact Seals – Maintenance-Free, Extended Life

The bearing features non-contact rubber seals on both sides that effectively prevent contaminants such as cutting fluids and dust from entering the bearing interior, while the non-contact design avoids friction between the seal lip and the inner ring – adding no extra resistance or heat generation. Integral sealing prolongs bearing service life. This ensures stable temperature performance even at 27,000 r/min ultra-high speeds, while significantly extending maintenance intervals.

 

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, offering higher limiting speed potential than 25° designs. The E-type high-speed design optimizes internal geometry and rolling element parameters – ball diameter 9.525 mm, 25 balls per bearing – offering higher speed capability and the ability to accommodate heavier loads than equivalent B-type high-speed bearings. Combined with a phenolic resin cage and Class A preload, the bearing achieves a limiting speed of 27,000 r/min under oil-air lubrication.

 

3. 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, providing effective load sharing between bearings

 

4. 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 27,000 r/min oil-air lubrication limiting speed.

 

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

The P4A tolerance class (dimensional accuracy to ISO Class 4, geometrical tolerances in accordance with SKF internal tolerances) guarantees minimal radial runout and axial play. Bore and outside diameter tolerances are controlled within extremely narrow ranges, meeting stringent surface quality and dimensional consistency requirements. Operating temperature range is -30°C to 110°C.

 

6. Lightweight Phenolic Resin Cage

The lightweight high-strength phenolic resin cage provides excellent guidance accuracy and low friction at high speeds. This material offers an excellent strength-to-weight ratio, contributing to reduced centrifugal forces, friction, and heat generation – a key factor in achieving the 27,000 r/min oil-air lubrication limiting speed.

 

7. All-Steel Construction – High Rigidity, Impact Resistance, Cost-Effectiveness

Premium chrome steel rings and balls offer higher fracture toughness and impact resistance – more reliable under interrupted cutting and accidental overload conditions. All-steel bearings also offer significant cost advantages for high-volume industrial applications.

 

8. Sealed Open Design – Flexible Lubrication Options

The bearing features non-contact seals and comes pre-lubricated from the factory – ready to install out of the box. The seal design also allows for relubrication when necessary, balancing maintenance-free operation with flexibility.

 

9. Clear Performance Specifications

 

Parameter Value

Bore d 70 mm

Outer Diameter D 110 mm

Width B 20 mm

Contact Angle 15°

Dynamic Load Rating C 23.8 kN

Static Load Rating C₀ 18.3 kN

Ball Diameter Dw 9.525 mm

Balls per Bearing 25

Speed (Grease) 17,000 r/min

Speed (Oil-Air) 27,000 r/min

Ball Material Chrome Steel

Ring Material Chrome Steel

Cage Material Phenolic Resin

Seal Type Non-Contact Rubber Seals (both sides)

Tolerance Class P4A

Preload Class A (Measured Load)

Arrangement Universal Matchable (SU)

Weight 0.61 – 0.64 kg

Temperature Range -30°C to 110°C

Typical Applications

The NMT 7014 CEGA/P4A, with its sealed protection, 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

 

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 non-contact seals and comes pre-lubricated from the factory – ready to install out of the box.

 

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

 

✅ To achieve the 27,000 r/min oil-air lubrication limiting speed, oil-air or oil-mist lubrication is recommended; grease lubrication limits speed to 17,000 r/min.

 

⚠️ 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.

 

⚠️ 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.

 

NMT Quality Commitment

Japan NMT (Enmutī) applies strict Japanese quality standards to every 7014 CEGA/P4A bearing – from ring material (high-purity chrome steel) and rolling elements 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, P4A precision, Class A measured load preload, non-contact seals, 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, maintenance-free operation, and flexible arrangement.

 

Choose NMT 7014 CEGA/P4A for:

 

✅ Non-contact seals – maintenance-free, extended life

 

✅ 15° contact angle + E-type high-speed design – 27,000 r/min ultra-high speed and heavy load combined

 

✅ Universal matchable – one inventory, infinite arrangements

 

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

 

✅ P4A super-precision running accuracy

 

✅ Lightweight phenolic resin cage – low friction, low noise, high speed

 

✅ All-steel – high rigidity, impact resistance, cost-effectiveness

 

✅ Factory pre-lubricated – ready to install