Dongguan Lihao Bearing Co., Ltd

Metric Ball Bearings

Standard metric series radial bearings and metric sleeve bearings carry moderate radial and thrust loads at low operating torque and provide high performance within small envelope designs. Stainless steel or chrome steel bearings are available with crown or ribbon type metallic cages.

Low Noise Motor Bearing S628ZZ
Model: 628ZZ/628-2ZSize: 8x24x8 mmStructure: Double sided iron cover dustproof (ZZ=2Z)Universal accuracy: ABEC-3/P6High end precision: ABEC-5/P5 (dental, high-speed motor)Deep groove ball bearing, doubleshieldedMiniature bearing 628ZZ,

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Single Row Deep Groove Ball Bearing S689
This S689 bearing has the following advantages:1. Less heat generation2. Lubricating grease has a longer service life3. Higher achievable rotational speed4. The service life of bearings is longer5. Lower energy consumption6. Lower energy

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High-Precision High-Speed Intelligent Dental Bearing S624ZZ
S624ZZ Dental Bearing Features:Withstands Autoclave CyclesRotational Speeds Up to 500,000 RPMSpecialized Bearing DesignWe can customize dental bearings in other sizes

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Crankshaft Bearing 6001-2RS
The crankshaft bearing 6001-2RS is a model of the deep groove ball bearing 6000 series. It is also a rotating component in motorcycle engines that connects the crankshaft and bearing seat, and plays an important role in converting piston

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Universal Bearing 6000-2RS Maintenance Free Ball Bearing
The bearing 6000-2RS is a deep groove ball bearing with double-sided rubber sealing rings, suitable for bicycle axles, pedals and other components. The 6000RS bearings produced by BLH Bearing Factory can be interchanged with 6000-2RS from

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Bearing 697ZZ 7 * 17 * 5
This is a deep groove ball bearing used in high-speed motor motors. We are a direct factory and can provide free samples or customize production according to your installation application.

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Deep Groove Ball Bearing 6704ZZ
Our company specializes in producing bearings 6704ZZ, with dimensions of 20*27*4. This type of bearing is also known as a thin-walled bearing. We can provide free samples,

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Stainless Steel Bearing Model: S685ZZ
This is a standard S685ZZ bearing, made of standard SUS304 stainless steel material and metal sealed; Stainless steel deep groove ball bearing S685ZZ/RS micro motor bearing 5 * 11 * 5mm

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Miniature Ball Bearing 683ZZ
The metric 3mm inner diameter miniature bearing 683 features a double-sided dust cover design. The steel balls and inner and outer rings are made of SUS440 material, offering excellent corrosion resistance. It can operate continuously at

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Car Wiper Motor Special Bearing S607ZZ
The bearings in the car wiper system are used at the hinge of the wiper arm. The motor drives the linkage mechanism to swing. The radial load of the bearing can reach 100-500N. In the case of snow cover, the load can reach up to 2500N. Due

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Special Bearing 6905-2RS For Automotive Steering Systems
Despite the increasing use of electrical controls in automobiles, many internal systems are still designed along traditional lines.For example, the steering column connects the steering wheel at the upper end and the steering gear (rack

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Automotive Tensioner Bearing 6206 2RS
The 6206-2RS automotive tensioner bearing is a crucial component of automotive engines, requiring stringent noise reduction and high-temperature resistance. BLH has collaborated with numerous automotive brands and boasts a long history of

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why choose us

Excellent Testing Equipment

BLH Bearing has its own independent laboratory, a complete R&D system, and a full range of testing equipment.

The Most Competitive Prices

With 60 sets of automated production lines, BLH Bearing can easily meet large-scale demand and provide the most competitive price guarantee.

One-Stop Solution

We offer one-stop solutions for global transmission equipment needs.

Our Service

Our professional bearing R&D capabilities, manufacturing strength, and 24/7 technical and after-sales service ensure that your transmission business is fully supported — with complete peace of mind.

Ball Bearings

Ball bearings are designed to reduce friction between moving parts while supporting and facilitating motion. How a ball bearing is made essentially surrounds the usage of two concentric rings, known as the inner and outer rings, with a set of spherical balls positioned between them which are often held in place by a cage.

Bearing No.	Hole diameter (d)		Outer diameter (D)		Width (B)		Chamfer radius (R)		Rating Load		Ball Complement	Limiting speed		Weight
Bearing No.	mm	inch	mm	inch	mm	inch	mm	inch	(Cr)	(Cor)	(Size)	(Grease)	(Oil)	kg
R2	3.175	0.1250	9.525	0.3750	3.97	0.156	3.97	0.156	0.3	0.012	0.218	56000	67000	0.002
R3	4.762	0.1875	12.700	0.5000	3.97	0.156	4.98	0.196	0.3	0.012	0.485	43000	53000	0.0025
R4	6.350	0.2500	15.875	0.6250	4.98	0.196	4.98	0.196	0.3	0.012	0.615	38000	45000	0.005
R6	9.525	0.3750	22.225	0.8750	5.56	0.219	7.14	0.281	0.4	0.016	1.410	32000	38000	0.010
R8	12.700	0.5000	28.575	1.1250	6.35	0.250	7.94	0.313	0.4	0.016	1.300	26000	32000	0.018
R10	15.875	0.6250	34.925	1.3750	7.14	0.281	8.73	0.344	0.6	0.024	3.285	22000	28000	0.031
R12	19.050	0.7500	41.275	1.6250	7.94	0.313	11.11	0.438	0.6	0.024	4.480	17000	20000	0.046
R14	22.225	0.8750	47.625	1.8750	9.53	0.375	12.70	0.500	0.6	0.024	5.850	13000	17000	0.076
R16	25.400	1.000	50.800	2.0000	9.53	0.375	12.70	0.500	0.6	0.024	5.850	13000	17000	0.085
R18	28.575	1.125	53.975	2.1250	9.53	0.375	12.70	0.500	0.6	0.024	8.300	10000	14000	0.090
R20	31.750	1.250	57.150	2.2500	9.53	0.375	12.70	0.500	0.6	0.024	8.300	10000	14000	0.096
R22	34.925	1.375	63.500	2.5000	11.1	0.437	14.29	0.567	0.8	0.032	10.500	9000	12000	0.133
R24	38.100	1.500	66.675	2.6250	11.1	0.437	14.29	0.567	0.8	0.032	11.800	8500	11000	0.145
R156	4.763	0.188	7.938	0.3125	2.78	0.1094	3.18	0.125	0.10	0.004	一	-	-	0.00044
R166	4.763	0.188	9.525	0.3750	3.18	0.1250	3.18	0.125	0.10	0.004	-	-	-	0.00080
R168	6.350	0.250	9.525	0.3750	3.18	0.1250	3.18	0.125	0.30	0.004	-	-	-	0.00060
R188	6.350	0.250	12.700	0.5000	3.175	0.130	4.76	0.188	0.20	0.08	1.999	40000	50000	0.00153
R3A	4.762	0.188	12.700	0.5000	4.978	0.1960	4.980	0.196	0.30	0.012	2.381	1.31	0.485	0.00250
R4A	6.350	0.250	19.050	0.7500	5.556	0.2188	7.144	0.282	0.40	0.016	3.969	2.175	1.136	0.008
R8-7	11.113	0.428	28.575	1.1250	6.35	0.25			0.40	0.016	4.763	4.62	2.79	0.015
R188Z	6.350	0.250	12.700	0.5000	4.762	0.190	4.76	0.188	0.20	0.08	1.999	40000	50000	0.0016

Advantages

Low Friction Coefficient

Ball bearings exhibit lower starting and running friction, ideal for high-speed applications.

Compact Design

They require less space and can be used in smaller mechanisms.

Versatility

Suitable for both radial and axial (thrust) loads.

Low Maintenance

They have a longer lifespan in applications with less axial load and require less frequent maintenance.

Design of Ball Bearings

Ball bearings contain four key components: two races (rings), the balls (rolling elements), and the retainer (which keeps the balls apart). Angular contact and radial ball bearings include an inner and outer ring, designed to support radial loads, applied perpendicular to the rotation axis.
The stationary outer race is housed to transfer radial loads. The inner race, attached to the rotating shaft, supports and steers the shaft. Rolling elements are crucial for carrying and spreading loads across raceways.

These elements rotate at different speeds from the inner race's speed but revolve around the inner race. The separator acts as a buffer to prevent the balls from colliding. Positioned between the balls, it prevents contact. Thrust bearings are designed to support loads parallel to the rotation axis (axial loads), consisting of two equal-sized rings.

Ball Bearing Dimensions

When specifying ball bearings, consider these critical dimensions:

Bore Diameter

Using a standard system, metric bore sizes are identified. Multiply bore sizes from 04 and up by 5 to determine millimeters. For hex bores, this refers to across-the-flats measurement. For tapered bearings, refer to the narrower diameter.

Outside Diameter

If housed, the outside diameter includes the housing but excludes the flange in flanged bearings. The outer ring width accounts for the entire bearing's outside width.

Overall Width

If present, the locking collar becomes part of the entire width of the bearing assembly.

Ball bearing uses

In addition to examples encountered in the previous sections, there is a wide range of applications for ball bearings. Most devices with engines or other forms of rotation take advantage of the spatial efficiency of rotational motion to convert it into other forms of movement or energy by way of structures that require rolling bearings. Such applications include the following.

Internal combustion engines

Support rotating output shaft

Electric motors

Support rotating output shaft

Gearboxes

Support rotating gear shafts and input and output shafts.

Centrifugal pumps

Support the rotating shaft near engine output and fan input

Agricultural equipment

Support the many rotating parts of tractors, plows, and other machines

Construction

Support many rotating cranes, excavators, compactors, and other machines

Types of Ball Bearings

The world of ball bearings is diverse, with various designs catering to different needs.

Deep Groove Ball Bearings: Can handle both radial and thrust loads.

Thrust Ball Bearings: Specifically designed to support axial loads.

Self-aligning Ball Bearings: Perfect for situations where misalignment might occur.

Angular Contact Ball Bearings: Designed to handle both radial and axial loads but where the load-carrying capacity of thrust loads is higher.

Flanged ball bearings: Having outer rim projections for easier mounting.

Thin section bearings: Designed with a slim cross-section.

Miniature bearings: Compact for small applications.

Stainless steel ball bearings: Able to resist corrosion and durable.

Ceramic Ball Bearings: Noted for their heat resistance and light weight, ceramic ball bearings are favored in high-speed applications where traditional materials fall short.

Packaging & Shipping

Packaging Detail	1. Industrial Exporting Package with anti-tarnish paper/Carton/Pallet 2. Individual plastic/Carton/pallet 3. As the customers' requirements
Delivery Detail	30-45 days for normal order

Our Honor

FAQ

Q: Are you a factory or trading company?

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

Q: Do you provide samples ? it is free charge?

A: Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q: What is your main product?

A: We are making 10 series and total about 100 types of bearings.

Q: What is the MOQ for bearings?

A: Our MOQ is 1000 pieces.

As one of the leading ball bearings manufacturers and suppliers in China, we warmly welcome you to wholesale bulk ball bearings for sale here from our factory. All customized bearings are with high quality and competitive price.