Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of double row cylindrical roller bearing nn3018k in China. As we have world-leading production equipment and strong manufacturing capabilities, we warmly welcome you to buy bulk high quality bearings at competitive price from our factory.

Double Row Precision Cylindrical Roller Bearing NN3018KW33/P5

Specifications

Bearing Type:	Precision cylindrical roller bearing NN3017K
Dimensions (dxDxB):	9014037mm (NN3018)
Material:	100% Chrome Steel for higher resistance and durability material
Retainer:	Steel or brass
Speed:	5600 rpm with grease, 6700 rpm with oil
Precision:	P5, P4
Lubrication:	Oil or grease
Brand:	HXB or OEM brand

How to choose the right precision?

Table 1 – Bore Diameter Tolerances (Inner Ring)

Units: μm

Bore Diameter d (mm)		Single Plane Mean Bore Diameter Deviation Δdmp										Single Bore Diameter Deviation Δds
Bore Diameter d (mm)		Grade 0		Grade 6		Grade 5		Grade 4		Grade 2		Grade 4 (Series 0,1,2,3,4)		Grade 2
Over	To	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower
0.6	2.5	0	−8	0	−7	0	−5	0	−4	0	−2.5	0	−4	0	−2.5
2.5	10	0	−8	0	−7	0	−5	0	−4	0	−2.5	0	−4	0	−2.5
10	18	0	−10	0	−8	0	−6	0	−5	0	−2.5	0	−5	0	−2.5
18	30	0	−12	0	−10	0	−8	0	−6	0	−4	0	−6	0	−4
30	50	0	−15	0	−12	0	−9	0	−7	0	−5	0	−7	0	−5
50	80	0	−19	0	−15	0	−10	0	−8	0	−5	0	−8	0	−5
80	120	0	−22	0	−18	0	−13	0	−10	0	−7	0	−10	0	−7
120	180	0	−25	0	−22	0	−15	0	−12	0	−8	0	−12	0	−8
180	250	0	−30	0	−25	0	−18	-	-	-	-	-	-	-	-
250	315	0	−35	0	−30	0	−23	-	-	-	-	-	-	-	-
315	400	0	−40	0	−35	0	−25	-	-	-	-	-	-	-	-
400	500	0	−45	0	−40	-	-	-	-	-	-	-	-	-	-
500	630	0	−50	-	-	-	-	-	-	-	-	-	-	-	-
630	800	0	−75	-	-	-	-	-	-	-	-	-	-	-	-
800	1000	0	−100	-	-	-	-	-	-	-	-	-	-	-	-
1000	1250	0	−125	-	-	-	-	-	-	-	-	-	-	-	-
1250	1600	0	−160	-	-	-	-	-	-	-	-	-	-	-	-
1600	2000	0	−200	-	-	-	-	-	-	-	-	-	-	-	-

Table 2 – Outside Diameter Tolerances (Outer Ring)

Units: μm

Outside Diameter D (mm)		Single Plane Mean Outside Diameter Deviation ΔDmp										Single Outside Diameter Deviation ΔDs
Outside Diameter D (mm)		Grade 0		Grade 6		Grade 5		Grade 4		Grade 2		Grade 4 (Series 0,1,2,3,4)		Grade 2
Over	To	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower	Upper	Lower
2.5	6	0	−8	0	−7	0	−5	0	−4	0	−2.5	0	−4	0	−2.5
6	18	0	−9	0	−8	0	−6	0	−5	0	−4	0	−5	0	−4
18	30	0	−11	0	−9	0	−7	0	−6	0	−4	0	−6	0	−4
30	50	0	−13	0	−11	0	−9	0	−7	0	−5	0	−7	0	−5
50	80	0	−15	0	−13	0	−10	0	−8	0	−6	0	−8	0	−6
80	120	0	−18	0	−15	0	−11	0	−9	0	−5	0	−9	0	−5
120	150	0	−25	0	−18	0	−13	0	−10	0	−7	0	−10	0	−7
150	180	0	−30	0	−20	0	−15	0	−11	0	−8	0	−11	0	−8
180	250	0	−36	0	−25	0	−18	0	−13	0	−10	0	−13	0	−10
250	315	0	−40	0	−28	0	−20	0	−15	0	−8	0	−15	0	−8
315	400	0	−45	0	−33	0	−23	-	-	-	-	-	-	-	-
400	500	0	−50	0	−38	0	−25	-	-	-	-	-	-	-	-
500	630	0	−75	0	−45	-	-	-	-	-	-	-	-	-	-
630	800	0	−100	0	−60	-	-	-	-	-	-	-	-	-	-
800	1000	0	−125	-	-	-	-	-	-	-	-	-	-	-	-
1000	1250	0	−160	-	-	-	-	-	-	-	-	-	-	-	-
1250	1600	0	−200	-	-	-	-	-	-	-	-	-	-	-	-
1600	2000	0	−250	-	-	-	-	-	-	-	-	-	-	-	-
2000	2500	0	−300	-	-	-	-	-	-	-	-	-	-	-	-

Key Features

High-speed performance with low heat generation: Our advanced design allows for higher operating speeds while minimizing thermal buildup, ensuring stable operation even under demanding conditions.
Extended service life: Formulated grease lubrication systems significantly extend maintenance intervals and overall bearing lifespan.
Exceptional high-speed stability: A high-rigidity PPS resin cage effectively resists deformation caused by centrifugal forces, maintaining precise, vibration-free rotation at high speeds.

Primary Applications

These bearings are widely used in industries requiring precision, reliability, and high performance, including:

Machine Tools: CNC lathes, machining centers, milling machines, and grinding spindles.
Automotive Manufacturing: Precision spindle equipment for engine component machining and assembly lines.

Advantages

∗ 30 years of dedicated development

HXB was founded in 1995, with nearly 30 years of dedicated development, HXB now operates6 subsidiaries.

∗ 2 high-tech R&D centers

∗ 2 modern manufacturing factories - Hangzhou Yijia Precision Bearing Co., Ltd. and Zhejiang Ruiyang Bearing Technology Co., Ltd.

∗ Supported by advanced digital MES and SPC management systems

∗ IATF16949:2016, ISO9001:2015 and ISO14001 certifications

∗ High-end equipment and high-quality material

About HXB

Company profile

Founded in May 1995, Hangzhou Huaxing Kechuang Holding Group (HXB), formerly known as Hangzhou Huaxing Bearing Co., Ltd., is a leading national high-tech enterprise and professional manufacturer specialized in high-precision, high-speed, and low-noise ball bearings in China. With nearly 30 years of continuous industry dedication and technical accumulation, HXB has grown into a comprehensive industrial group integrating independent R&D, standardized production, global sales, and one-stop technical services.

HXB owns 6 subsidiaries (including 3 national high-tech enterprises and Zhejiang provincial science and technology enterprises), 2 provincial-level high-tech R&D centers, and two modern intelligent manufacturing bases: Hangzhou Yijia Precision Bearing Co., Ltd. andZhejiang Ruiyang Bearing Technology Co., Ltd.. The group employs over 400 staff members, including more than 80 professional R&D engineers, supporting stable innovation, mass production, and customized bearing solutions for global clients.

Core Manufacturing & R&D Strength

Deep Groove Ball Bearings: 34 production lines, annual output of 30 million pieces

Angular Contact Ball Bearings: 14 production lines, annual output of 3 million pieces

Full Product Portfolio

Precision Machine Tool Bearings: High-precision spindle bearings, high-speed angular contact ball bearings, ball screw support bearings

Motor & Servo Bearings: Low-noise EMQ motor bearings, servo motor bearings, high-speed vertical motor bearings

Strict Quality Certification & Standardization

IATF16949:2016, ISO9001:2015, and ISO14001. Every batch of bearings undergoes strict dimensional inspection, 100% full vibration & noise testing, and high-low temperature durability testing before delivery.

Customization & Global Market Service

HXB supports flexible OEM & ODM customized services. We can develop and produce non-standard precision bearings strictly according to customer drawings, samples, and special working condition requirements.

Certificates

Exhibition

FAQ

Q: Are you a factory or trading company?

A: We are factory specialized in manufacturing and exporting bearings.

Q: How soon can we get a reply after we send you an inquiry?

A: In working days, we will reply to you within 12 hours after receiving the inquiry.

Q: What application areas do your products mainly involve?

A: Our product application fields mainly include motors, water pumps, household appliances, automobiles, motorcycles, power tools, engraving machines, reducers, machine tools, CNC machining centers, textile machinery, woodworking machinery, etc.

Q: Can you make customized products?

A: Yes, we can customize products according to customer needs, develop and produce products according to drawings or samples provided by customers. We also have our own brands of HXB and YJB.

Q: Where are your goods mainly exported to?

A: Our products are mainly exported to the United States, Japan, South Korea, India and other countries. The main customers are Siemens, JOHN-DEER, HUSQVARNA, FEDERAL- MOGUL.

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