Type C Deep Groove Thin Section Ball Bearings

Thin Section Deep Groove Ball Bearings – C-Type Open Bearings

Thin section deep groove ball bearings are widely used in modern rotating equipment where compact structure, reduced weight, and stable rotational accuracy are essential. The NKAA10CP0–NKG250CP0 series is designed to provide reliable radial load performance while minimizing space requirements and overall system weight. These bearings are particularly suitable for applications that demand lightweight mechanical structures without sacrificing operational stability or service life.

Manufactured using high-quality 52100 chrome steel and precision-controlled production processes, this series combines compact geometry with dependable running accuracy. The open-type configuration also supports efficient lubrication performance and reduced rotational friction in high-speed operating environments.

Engineered for Compact and Lightweight Equipment

As industrial equipment continues to move toward lightweight and space-saving designs, engineers increasingly require bearing solutions that deliver high efficiency within limited installation spaces. The NKAA–NKG series addresses these requirements through an optimized thin-section structure that maintains a consistent cross section while allowing larger bore diameters.

The bearing design helps equipment manufacturers reduce total assembly weight, simplify surrounding structures, and improve rotational efficiency. Compared with conventional bearings of the same bore size, thin section bearings occupy significantly less space and contribute to lower inertia during operation.

Because of these advantages, C-Type thin section bearings are commonly selected for:

Robotics and automation systems

Medical imaging equipment

Semiconductor manufacturing machinery

Aerospace positioning systems

Optical instruments

Packaging equipment

Precision rotary tables

Industrial automation devices

Lightweight conveyor systems

Optimized Radial Load Performance

The NKAA10CP0–NKG250CP0 series belongs to the single-row radial contact ball bearing category. Engineers primarily optimize this bearing structure for radial load applications. The internal geometry enables smooth rotational performance and stable running accuracy under continuous operating conditions.

The inner and outer rings incorporate a controlled axial displacement design. This structure strategically limits the number of load-carrying balls to approximately 50% of a full complement arrangement. As a result, the bearing achieves an effective balance between compactness, rotational smoothness, friction reduction, and operational efficiency.

Although the bearing is mainly intended for radial loads, it can also support limited unidirectional thrust loads when operating conditions require moderate axial positioning capability.

For applications involving significant axial loads or combined loading conditions, angular contact thin section bearings remain the preferred solution because their internal contact angle is specifically engineered for simultaneous radial and axial load support.

Advantages of C-Type Thin Section Bearings

Compact Cross-Section Design

The thin-section profile allows designers to maximize shaft diameter while minimizing overall assembly dimensions. This feature is especially valuable in compact automation systems and lightweight rotating structures.

Reduced Equipment Weight

The lightweight bearing construction helps lower total machine mass, which can improve motion responsiveness, reduce energy consumption, and decrease drive system loads.

Smooth Rotational Performance

Precision-ground raceways and high-quality steel balls contribute to stable running accuracy, low vibration, and reduced operating noise.

Flexible Integration

The open bearing configuration allows convenient lubrication access and supports integration into customized mechanical systems requiring specialized lubrication methods.

Cost-Effective Performance

Compared with more complex bearing arrangements, C-Type deep groove thin section bearings provide a practical balance between performance, simplicity, and operating economy.

Material and Manufacturing Quality

The NKAA–NKG series uses premium-grade 52100 chrome steel for both rings and rolling elements. This material offers excellent hardness, wear resistance, and fatigue strength, helping the bearing maintain long-term dimensional stability under repeated operating cycles.

Depending on application requirements, the cage material can be selected from:

Brass cages for enhanced durability and high-temperature stability

Nylon cages for lightweight operation and reduced running noise

Each bearing undergoes precision machining and quality inspection procedures to ensure reliable dimensional consistency and dependable operational performance.

Typical Application Industries

Manufacturers and system integrators frequently select thin section deep groove ball bearings for equipment that requires compact rotational support with stable accuracy. Common industries include:

Robotics and Automation

Robotic joints and automated motion systems benefit from reduced bearing weight and compact geometry.

Medical Equipment

CT scanners, imaging systems, and diagnostic devices require smooth and quiet rotational performance within limited installation spaces.

Aerospace Systems

Aircraft and satellite components often demand lightweight rotating assemblies with high reliability.

Semiconductor Equipment

Precision handling systems require low-friction rotation and stable positioning accuracy.

Optical and Inspection Systems

Compact rotary stages and optical alignment devices depend on minimal vibration and consistent rotational accuracy.

Technical Specifications

Why Choose Our Thin Section Bearings

Our engineering team focuses on producing thin section bearings that meet the practical demands of modern industrial equipment. We combine precision machining, stable material quality, and strict dimensional control to help customers achieve reliable rotational performance in compact applications.

We also support customized solutions based on different operating environments, including:

Custom lubrication options

Special cage materials

Stainless steel alternatives

Higher precision grades

Customized clearance configurations

OEM and bulk production support

Whether your project requires lightweight robotic motion systems or precision industrial positioning equipment, our thin section bearing solutions provide dependable performance for demanding operating environments.

Thin Section Radial Contact Ball Bearings NKAA Series (3/16″X 3/16″)

C-TYPE–Thin Section Bearings

Seals Type: Open

Series: NKAA

Inner Diameters: 1.000 inch (25.4 mm)-1.750 inch (44.45 mm)

Outer Diameters: 1.375 inch (34.925 mm)- 2.125 inch (53.975 mm)

Thin Section Radial Contact Ball Bearings NKA Series (1/4″X 1/4″)

C-TYPE–Thin Section Bearings

Seals Type: Open

Series: NKA

Inner Diameters: 2.000 inch (50.8 mm)-12.000 inch (304.8 mm)

Outer Diameters: 2.500 inch (63.5 mm)- 12.5 inch (317.5 mm)

Weight:0.048 kg-0.254 kg

Thin Section Radial Contact Ball Bearings NKB Series (5/16″X 5/16″)

Thin Section Radial Contact Ball Bearings NKC Series (3/8″X 3/16″)

Thin Section Radial Contact Ball Bearings NKD Series (1/2″X 1/2″)

C-TYPE–Thin Section Bearings
Seals Type: Open
Series: NKD
Inner Diameters: 4.000 inch (101.6 mm)-20.000 inch (508 mm)
Outer Diameters: 5.000 inch (127.000 mm)- 21.000 inch (533.400 mm)
Weight:0.366 kg-1.750 kg

◆NKD SERIES
Part No	Dimension（inch/mm)			Basic Cap（N)		Weight	Interchange
	d	D	H	Cor	Cr	Kg	NTN	KAYDON	INA
NKD040CP0	4.000	5.000	0.500	13690	6270	0.366	KRD040	KD040CP0	CSCD040
	101.600	127.000	12.700
NKD042CP0	4.250	5.250	0.500	14180	6400	0.386	KRD042	KD042CP0	CSCD042
	107.950	133.350	12.700
NKD045CP0	4.500	5.500	0.500	15200	6710	0.405	KRD045	KD045CP0	CSCD045
	114.300	139.700	12.700
NKD047CP0	4.750	5.750	0.500	15690	6850	0.426	KRD047	KD047CP0	CSCD047
	120.650	146.050	12.700
NKD050CP0	5.000	6.000	0.500	16710	7160	0.454	KRD050	KD050CP0	CSCD050
	127.000	152.400	12.700
NKD055CP0	5.500	6.500	0.500	18230	7560	0.485	KRD055	KD055CP0	CSCD055
	139.700	165.100	12.700
NKD060CP0	6.000	7.000	0.500	19780	8000	0.526	KRD060	KD060CP0	CSCD060
	152.400	177.800	12.700
NKD065CP0	6.500	7.500	0.500	21290	8400	0.566	KRD065	KD065CP0	CSCD065
	165.100	190.500	12.700
NKD070CP0	7.000	8.000	0.500	22800	8800	0.606	KRD070	KD070CP0	CSCD070
	177.800	203.200	12.700
NKD075CP0	7.500	8.500	0.500	24310	9160	0.650	KRD075	KD075CP0	CSCD075
	190.500	215.900	12.700
NKD080CP0	8.000	9.000	0.500	25830	9560	0.694	KRD080	KD080CP0	CSCD080
	203.200	228.600	12.700
NKD090CP0	9.000	10.000	0.500	28890	10310	0.780	KRD090	KD090CP0	CSCD090
	228.600	254.000	12.700
NKD100CP0	10.000	11.000	0.500	31920	10980	0.853	KRD100	KD100CP0	CSCD100
	254.000	279.400	12.700
NKD110CP0	11.000	12.000	0.500	34980	11690	0.934	KRD110	KD110CP0	CSCD110
	279.400	304.800	12.700
NKD120CP0	12.000	13.000	0.500	38010	12360	1.020	KRD120	KD120CP0	CSCD120
	304.800	330.200	12.700
NKD140CP0	14.000	15.000	0.500	44090	13650	1.240	KRD140	KD140CP0	CSCD140
	355.600	381.000	12.700
NKD160CP0	16.000	17.000	0.500	50180	14890	1.410	KRD160	KD160CP0	CSCD160
	406.400	431.800	12.700
NKD180CP0	18.000	19.000	0.500	56230	16050	1.580	KRD180	KD180CP0	CSCD180
	457.200	482.600	12.700
NKD200CP0	20.000	21.000	0.500	62320	17200	1.750	KRD200	KD200CP0	CSCD200
	508.000	533.400	12.700

Thin Section Radial Contact Ball Bearings NKF Series (3/4″X 3/4″)

Thin Section Radial Contact Ball Bearings NKG Series (1″X 1″)