NMT Ltd.
Corporate Communications Department
NMT 7007 ACDGC/P4A Super Precision Steel Angular Contact Ball Bearing – Japan NMT Cost-Effective High-Rigidity Spindle Solution
Product Overview
The NMT 7007 ACDGC/P4A is a super-precision single-row angular contact ball bearing manufactured entirely from bearing steel. With a 35 mm bore, 62 mm outer diameter, and 14 mm width, this bearing features a 25° contact angle design, tailored for high-rigidity, moderate-speed spindle applications. Manufactured to the P4A super-precision tolerance class (dimensional accuracy to P4 grade, running accuracy exceeding P4 grade) and combined with a high-capacity D-type design, it delivers exceptional combined radial and axial load capacity within a compact envelope.
With a basic dynamic load rating of 14.8 kN and static load rating of 9 kN – identical to its hybrid ceramic counterpart – the all-steel construction offers a significant cost advantage, making it ideal for precision equipment where budget sensitivity and moderate speed requirements coexist.
Model Code Decoding – Understanding NMT 7007 ACDGC/P4A
Code Meaning
7007 Basic series designation, 35 mm bore, medium-duty angular contact bearing
AC Angular contact design with 25° contact angle
D High-capacity D-type design with increased ball complement
G Single bearing
C Universal matchable with preload class C (measured load level C) – supports back-to-back (<>), face-to-face (><), or tandem (>>) arrangements
P4A Super-precision tolerance class – dimensional accuracy P4, running accuracy exceeding P4
Note: Absence of "HC" suffix indicates steel rolling elements (rather than ceramic). Cage material may be steel or phenolic resin (please refer to actual product).
Core Performance Advantages
1. Super-Precision P4A Running Accuracy
The P4A tolerance class guarantees minimal runout and vibration, meeting stringent rotational stability demands of high-precision machine tool spindles and measuring instruments.
2. High-Capacity D-Type Design
Optimized ball complement and raceway geometry deliver higher rigidity and load-carrying capacity within a limited footprint, effectively resisting cutting forces and impact loads.
3. Universal Matchable Design – Flexible Arrangements
The "C" suffix indicates universal matchable capability with predefined C-class preload. Back-to-back, face-to-face, or tandem configurations can be achieved without selective shimming, ensuring uniform load distribution within the designated preload range and significantly simplifying assembly.
4. All-Steel Rolling Elements – Classic Reliability and Cost Efficiency
Compared to hybrid ceramic versions, the all-steel bearing maintains a high limiting speed while substantially reducing procurement costs. It also offers better compatibility with various lubricants and easier maintenance, making it a mature choice for high-volume industrial applications.
5. Lightweight and Sustainable
Each bearing weighs only 0.15 kg with a carbon footprint of just 0.56 kg CO₂e, balancing performance with environmental responsibility.
Typical Applications
The NMT 7007 ACDGC/P4A is ideally suited for:
General Machine Tool Spindles – turning, milling, and grinding spindles (moderate speed)
CNC Machining Centers – high-rigidity, high-accuracy spindle systems
Precision Rotary Tables – indexing devices and rotary worktables
Industrial Robots – joints and high-precision transmission mechanisms
High-Speed Motors – permanent magnet synchronous motors and spindle motors (non-ultra-high-speed scenarios)
Direct Replacement for SKF 7007 ACDGC/P4A
NMT Quality Commitment
Japan NMT (Enmutī) upholds precision manufacturing excellence, applying micro-profiling to rolling contact surfaces and precision raceway grinding to ensure contact angle deviations are minimized to an extremely narrow range. The 7007 ACDGC/P4A, with its P4A accuracy and C-class preload rigidity, delivers reliable rotational support for your equipment.
Choose NMT 7007 ACDGC/P4A for:
✅ Japanese precision manufacturing craftsmanship
✅ Super-precision P4A tolerance class
✅ High-capacity D-type design
✅ Universal matchable flexible arrangements
✅ All-steel cost-effective solution
✅ Full lifecycle reliability
Speed Note: Maximum limiting speed depends on lubrication, mounting fit, and heat dissipation conditions. Please consult NMT technical engineers for detailed data.