Inch R series Groove ball bearings from China manufacturer - Ningbo Nide Mechanical Equipment Co., Ltd.

Price:	0.5 USD
Payment Terms:	T/T,L/C
Place of Origin:	Zhejiang, China (Mainland)


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Product Detail

Model No.: NDPJ-ZC-21

Production Capacity: 1000000

Delivery Date: 20 days

Condition: New

Seal Type: Rubber or Iron

Grease Type: SRL or Customized

Certifiacate: CCC

Name: ball bearing

Means of Transport: Ocean,Land,Air

Packing: suitable for sea transport

Model no.: Inch R series

Dimension: Customized

Composition: Two Rings, Rolling Elements...

Vibration Grade: Customized

Material Type: Customized

1.Various of groove ball bearings with different specifications.
2.Product according to customers'requirement.

We could design and manufacture ball bearing according to your drawing and specified requirements. Welcome to inquiry. Competitive price and high quality.

Bearing Specification Inch R Series

Basic Bearing No.

Bore
d
mm inch

Outer Diameter
D
mm inch

Width
W

Radius
r

mm inch

Basic Load
Rating KN

Open
mm inch

Shield
Seal
mm inch

Dynamic
C

Static
C₀

R156

R166

R3A

R168

R188

R4A

R8-7

R10

R12

99502H

4.763 .1875

6.350 .2500

9.525 .3750

12.700 .5000

11.113 .4375

15.875 .6250

19.050 .7500

15.875 .6250

7.938 .3125

9.525 .3750

12.700 .5000

9.525 .3750

12.700 .5000

15.875 .6250

19.050 .7500

22.225 .8750

28.575 1.1250

34.925 1.3750

41.275 1.6250

34.925 1.3750

2.78 .1094

3.18 .1250

3.97 .1562

4.98 .1960

3.18 .1250

4.98 .1960

5.56 .2188

6.35 .2500

7.14 .2812

7.94 .3125

......

3.18 .1250

4.98 .1960

3.18 .1250

4.76 .1875

4.98 .1960

7.14 .2812

7.94 .3125

......

8.73 .3438

11.11 .4375

11 .4331

0.1 .004

0.15 .006

0.1 .004

0.15 .006

0.2 .008

0.3 .012

0.6 .024

0.395

0.710

1.31

0.268

0.83

1.48

2.34

3.30

3.912

4.605

7.246

7.75

0.143

0.268

0.49

0.136

0.37

0.615

0.885

1.40

2.245

2.774

4.445

3.60

* Width RS & 2RS=5/16 inch7.938mm

# Width RS & 2RS=11/32 inch8.731mm

What is ball bearing?

Ball bearings, also known as anti-friction bearings, are small metallic or ceramic spheres used to reduce friction between shafts and axles in a number of applications. Ball bearings are often used in a series to absorb the weight placed on a moving part, or in individual cages to reduce friction in axle assemblies. Most are manufactured to meet very exacting standards of roundness, since any deformation can cause the moving parts to fail unexpectedly.

Manufacturing ball bearings is surprisingly similar to forming balls of dough. A supply of metal wire approximately the same diameter as the bearings is placed in a machine with two plates designed as hemispheres. When the two halves are brought together forcefully, a rough metal ball is formed. The problem is, some additional metal shards called flashing still remain. The balls are then placed in another machine that removes the flashing to create a perfect state of roundness.

This second machine consists of two grooved plates, one with an open notch to receive the ball bearings. As this machine fills with unfinished balls, the upper grooved plate begins to twist in different directions over the immovable bottom plate. This action is similar to a cook using his or her hands to form balls of dough. The first run through this machine removes the flashing and helps the bearings become fairly uniform in size.

A second run through the same machine adds a lubricating liquid and abrasives to the mix. The ball bearings are ground down to a precise size by the action of the abrasives. Once the balls have reached an acceptable size and uniformity, a third run uses a polishing agent to give them a friction-reducing shine. All of the bearings are given one final inspection to check for imperfections before they are approved for use in other applications.