Product Overview

The NMT 7016 ACDGB/P4A is an open, universally matchable single-row super-precision angular contact ball bearing. With an 80 mm bore, 125 mm outer diameter, and 22 mm width, this bearing features a 25° contact angle (AC type) and D-type high-capacity design, combined with all-steel rolling elements and a phenolic resin cage, factory-preset with Class B light preload (GB) . It integrates ultra-precision rotational accuracy, high load capacity, excellent high-speed performance, and universal matchable flexibility into a single package, accommodating radial and unidirectional axial loads simultaneously.

 

The bearing offers a radial dynamic load rating of 62.4 kN (14,040 lbf) and a static load rating of 58.5 kN (13,162 lbf) . The GB 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 (superior to ABEC 7) with a 25° contact angle and Class B light preload, the bearing achieves a limiting speed of 28,000 r/min. The operating temperature range is -30°C to 110°C. The bearing weighs approximately 0.85 kg.

 

Model Code Decoding – Understanding NMT 7016 ACDGB/P4A

Code Meaning

7016 Basic series designation, 80 mm bore, 125 mm OD

AC Angular contact design with 25° contact angle

D D-type high-capacity design – optimized ball complement (20 balls) for higher load capacity

G Single bearing (not a pre-assembled set)

B Class B light preload – eliminates internal clearance, reduces deflection, improves system stiffness

P4A Super-precision tolerance class – superior to ABEC 7, bore and OD tolerances -0.004 mm to 0

Core Value: GB universal matchability (SU) means every NMT 7016 ACDGB/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, providing effective load sharing within a predetermined preload range. The AC-type 25° contact angle delivers superior axial rigidity while maintaining ample radial capacity. The D-type high-capacity design, with optimized rolling element parameters – ball diameter 14.288 mm, 20 balls per bearing – achieves an outstanding 62.4 kN dynamic and 58.5 kN static load rating. Class B light preload eliminates internal clearance and reduces vibration and noise at high speeds, enhancing system stiffness. 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. D-Type High-Capacity Design – High Load in Compact Space

The D-type high-capacity design optimizes rolling element parameters – ball diameter 14.288 mm, 20 balls per bearing – achieving an outstanding 62.4 kN (14,040 lbf) dynamic and 58.5 kN (13,162 lbf) static load rating. Capable of accommodating heavy loads at relatively high speeds.

 

2. 25° Contact Angle – Optimized Balance of Rigidity and Speed

The 25° contact angle delivers superior axial rigidity while maintaining ample radial capacity. This contact angle optimizes load distribution, providing an ideal balance between thrust load capacity and high-speed capability. Combined with P4A super-precision and Class B light preload, the bearing achieves a limiting speed of 28,000 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, providing effective load sharing within a predetermined preload range

 

4. Class B Light Preload – Ideal for High-Speed Precision Applications

Class B light 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, and enhancing system stiffness. This ensures stable temperature performance even at the 28,000 r/min limiting speed.

 

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

The P4A tolerance class (superior to ABEC 7) guarantees minimal radial runout and vibration. Bore and outside diameter tolerances are -0.004 mm to 0, 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 and superior sliding properties, contributing to reduced centrifugal forces, friction, and heat generation – a key factor in achieving the 28,000 r/min 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. All-steel bearings also offer significant cost advantages for high-volume industrial applications.

 

8. Open Design – Flexible Lubrication Options

This bearing features an open design, allowing flexible selection of lubrication methods based on application requirements, and facilitating easy maintenance and relubrication.

 

9. Clear Performance Specifications

 

Parameter Value

Bore d 80 mm

Bore Tolerance -0.004 mm to 0

Outer Diameter D 125 mm

OD Tolerance -0.004 mm to 0

Width B 22 mm

Contact Angle α 25°

Dynamic Radial Load C 62.4 kN (14,040 lbf)

Static Radial Load C₀ 58.5 kN (13,162 lbf)

Fatigue Load Limit Pu 2.45 kN

Ball Diameter Dw 14.288 mm

Balls per Bearing 20

Limiting Speed 28,000 r/min

Distance to Pressure Point a 35.0 mm

Reference Grease Amount Gref 11.1 cm³

Ball Material Chrome Steel

Ring Material Chrome Steel

Cage Material Phenolic Resin

Seal Type Open

Tolerance Class P4A

Preload Class B (Light)

Arrangement Universal Matchable (SU)

Weight 0.85 kg

Temperature Range -30°C to 110°C

Typical Applications

The NMT 7016 ACDGB/P4A, with its high load capacity, ultra-precision, excellent 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, milling and turning center spindles

 

High-Speed Electric Spindles – PCB drilling, engraving machines, high-frequency motor spindles

 

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 (GB) – 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 – select appropriate lubrication method based on application. 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 B light 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.

 

⚠️ Ensure shaft and housing bore concentricity and straightness meet P4A grade requirements to achieve the expected rotational accuracy and service life.

 

⚠️ GB suffix indicates Class B light preload, which differs from GA (Class A extra light preload) – select the appropriate preload class based on application requirements.

 

NMT Quality Commitment

Japan NMT (Enmutī) applies strict Japanese quality standards to every 7016 ACDGB/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 25° contact angle (AC type), D-type high-capacity design, P4A precision, Class B light preload, and universal matchable flexibility makes this bearing the flagship general-purpose precision bearing in the NMT 7016 series – offering the perfect balance of high performance, high load capacity, and flexible arrangement.

 

Choose NMT 7016 ACDGB/P4A for:

 

✅ 25° contact angle + D-type high capacity – 62.4 kN (14,040 lbf) high load capacity

 

✅ Universal matchable – one inventory, infinite arrangements

 

✅ Class B light preload – ideal for high-speed precision applications

 

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

 

✅ 28,000 r/min ultra-high-speed performance

 

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

 

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

 

✅ Open design – flexible lubrication options