5 Must-Have Features in a Deep Groove Ball Bearings 6240m

As we all know, bearings have a lot of types, and different structures, materials, sizes, precisions, etc. can lead to different models. Each bearings have different characteristics, advantages, and disadvantages, these make them suitable for different application scenarios. 

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Deep groove ball bearings are one of the most widely used in various machinery among bearings due to their simple structure, stable performance, low friction, strong durability, etc. Choosing suitable deep groove ball bearings will not only affect the machines' operating efficiency and performance but also the reliability and safety of the mechanical equipment. 

In order to make users understand deep groove ball bearings better, LNB Bearing will detailly introduce the deep groove ball bearings' meaning, models, applications, and so on. If you need the ball bearing size charts PDF document, please contact us, we will send the PDF for user reference.

What is a deep groove ball bearing?

1. Deep Groove Ball Bearing Definition

Deep groove ball bearing is a kind of rolling bearing, which is mainly composed of four basic components: rolling element (ball), inner ring, outer ring, and cage.

Inner ring:

The inner ring usually fits tightly with the shaft and it is the main component to bear axial load.

Outer ring:

The outer ring is installed in the bearing seat to provide support and guidance.

Rolling element:

The rolling element of deep groove ball bearing is spherical, which can effectively reduce friction and improve working efficiency.

Cage:

The cage is used to maintain the spacing of rolling elements to ensure their balance and stability during bearing rotation.

Generally speaking, the rolling elements, inner and outer rings of deep groove ball bearings are usually made of high chromium steel, of course, there are also other materials such as ceramics, carbon steel, stainless steel, plastic, etc. But the cage's materials normally have more choices, it is usually divided into two types: Metal materials and Non-metal materials, such as brass, carbon steel, aluminum alloy, chrome steel, stainless steel and other metal materials, and Teflon, nylon, PTEF, ceramics, polymer materials, and other non-metallic materials.

Because of its special and simple structure, deep groove ball bearings can withstand both radial loads and certain axial loads. Its core function is to reduce friction through the ball's movement to help mechanical equipment smoothly and efficiently run.

2. Deep Groove Ball Bearing Classification

Deep groove ball bearings can be classified into many types according to their different designs, materials, structural features, and so on. Each bearing type has its own unique design and characteristic and application field. 

The following are common classifications of deep groove ball bearings:

(1) Classification By Design Structure

Open Type

Open type deep groove ball bearings have low friction, no seals or dustproof devices, and allowing free flow of lubricating oil. They are suitable for clean, high-speed operation and regular lubrication environments. 

Sealed Type

Sealed type deep groove ball bearings have rubber seals, usually with bearing model post-codes RS (single-sided sealed) and 2RS (double-sided sealed), which can effectively prevent lubricating oil leakage and the external pollutants entering. They are suitable for working environments with high dust and humidity. 

Shielded Type

Shielded type deep groove ball bearings have metal cover shield, usually with bearing model post-codes Z (single-sided shield) and ZZ (double-sided shield). The shielded type bearings have less sealing than sealed types, but they can also prevent larger dust particles and impurities from entering the bearing. They are suitable for generally polluted environments.

(2) Classification By Material

Steel Bearing

The most common types of steel bearings include carbon steel bearings, chrome steel bearings, stainless steel bearings, alloy steel bearings, etc., they are suitable for most industrial and life applications. 

Ceramic Bearing

According to the amount of ceramic material used, ceramic bearings can be divided into full ceramic bearings and hybrid ceramic bearings. Based on the different ceramic materials, they can be divided into zirconia bearings, silicon nitride bearings, silicon carbide bearings, etc. Ceramic deep groove ball bearings have many strong points, for instance, low density, high-temperature resistance, electrical insulation, higher wear resistance, and corrosion resistance, etc. They are suitable for use in high-temperature, high speed, or corrosive environments. 

Plastic Bearings

Plastic deep groove ball bearings are usually made of engineering plastics, which have light weight and have good corrosion resistance. The plastic bearings are usually suitable for applications that are sensitive to weight and have a relatively mild working environment.

(3) Classification By Size

Small Deep Groove ball bearings 

Small deep groove ball bearings are generally used in small mechanical equipment, such as small motors, etc. 

Medium deep groove ball bearings 

Medium deep groove ball bearings, which have good load-bearing capacity and service lifespan. They are widely used in motors, automobiles, and various industrial equipment. 

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Large deep groove ball bearings 

Large deep groove ball bearings can withstand large loads and impacts and are mostly used in heavy machinery, ships, power generation equipment and other fields.

(4) Classification By Precision Grade

Ordinary precision deep groove ball bearings 

Ordinary precision means P0 grade, in bearing systems with a rotational precision greater than 10μm. Ordinary precision deep groove ball bearings are suitable for general industrial use and they can meet most equipment' requirements. For example, the ordinary machine tools' speed change mechanisms, feed mechanisms,  automobiles, tractors' speed change mechanisms, and other general machinery. 

High-precision deep groove ball bearings 

High-precision deep groove ball bearings usually include P6 and P5 grade, in precision machines with a precision of 5-10μm or a higher rotation speed. High-precision bearings are suitable for applications requiring strict tolerances, such as aerospace, precision instruments, etc. For example, ordinary lathes use grade 5 for the front support and grade 6 for the rear support. Ultra-high precision deep groove ball bearings 

Ultra-high precision deep groove ball bearings 

Ultra-high precision deep groove ball bearings contain P4, and P2 grade, in ultra-precision machinery with a precision of less than 5μm or a very high rotation speed, such as high-precision machine tools, laser equipment, gear systems of precision grinders, scientific research instruments, precision machinery, etc.

(5) Classification By Lubrication Method

Oil-lubricated deep groove ball bearings

This type of deep groove ball bearings uses oil as a lubricant, suitable for high load and high temperature environments. 

Grease-lubricated deep groove ball bearings 

This type of deep groove ball bearings use grease as a lubricant, suitable for low-speed and medium-speed applications, and they are easy to maintain.

3. Deep Groove Ball Bearings Dimensions

In general, the dimensions of deep groove ball bearings are mainly composed of three main parameters: inner diameter (bore diameter), outer diameter, and width. The measurement values are usually in millimeters (mm) or inches (in), and the two can be converted.

Inner diameter (d):

Inner diameter refers to the inner ring's hole diameter of the bearing, which is usually indicated by d. It usually matches the diameter of the rotating shaft.

Outer diameter (D):

Outer diameter refers to the outer ring's diameter of the bearing, which is indicated by D. It determines the installation space of the bearing.

Width (B):

Width refers to the thickness of the bearing, which is indicated by B. It affects the bearing's load-bearing capacity and stability.

Different deep groove ball bearing models have different sizes (inner diameter, outer diameter, width). When selecting deep groove ball bearings, reasonable size selection is crucial to ensure the normal operation of the equipment and devices.

Deep Groove Ball Bearing Size Chart

Deep groove ball bearings mainly include the series, series, series, series, series, series, series, series, etc. 

LNB bearing provides full models and high-quality deep groove ball bearings with different precision (P0-P6), different ABEC tolerances (1-9 grades), different clearances (C2-C4), different materials (steel, ceramic, stainless steel, etc.), different cages (J type, W type, RJ type, TW type, etc.), and different seals (open type, metal guard-ZZ; rubber seal-2RS).

1. Series

series deep groove ball bearings are suitable for bearing low to medium radial loads. They have the advantages of light weight, high speed, small size, small installation space, and convenience, and are very suitable for applications with limited space.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 10 26 8 4.55  1.97  0.019  12 28 8 5.10  2.38  0.022  15 32 9 5.58  2.85  0.030  17 35 10 6.00  3.25  0.040  20 42 12 9.38  5.02  0.069  25 47 12 10.10  5.85  0.080  30 55 13 13.20  8.30  0.116  35 62 14 16.00  10.30  0.155  40 68 15 17.00  11.80  0.185  45 75 16 21.00  14.80  0.230  50 80 16 22.05  16.21  0.250  55 90 18 30.20  21.80  0.362  60 95 18 31.65  24.22  0.385  65 100 18 32.00  24.72  0.410  70 110 20 38.50  30.50  0.575  75 115 20 40.20  33.20  0.603  80 125 22 47.50  39.80  0.821  85 130 22 50.80  42.80  0.848  90 140 24 58.00  49.80  1.100  95 145 24 57.80  50.00  1.150  100 150 24 64.50  56.20  1.180  105 160 26 71.80  63.20  1.520  110 170 28 81.80  72.80  1.890  120 180 28 87.50  79.20  1.990  130 200 33 105.00  96.80  3.080  140 210 33 116.00  108.00  3.170  150 225 35 132.00  125.00  3.900  160 240 38 145.00  138.00  4.830  170 260 42 168.00  172.00  6.500  180 280 46 188.00  198.00  8.510  190 290 46 188.00  200.00  8.865  200 310 51 205.00  225.00  11.640  220 340 56 252 268 18 240 360 56 270 292 20 260 400 65 292 372 28.8

2. Series

series deep groove ball bearings have lighter weights and lower friction coefficients. They can carry more load compared to the series and run smoothly and stably at high speeds. Their structures are simple, which allows for easy installation and maintenance with space requirements being minimal. Applications that series ball bearings adapt to work for are widely, including household appliances, motorcycles, cars, food processing machinery, chemical and pharmaceutical machinery, pump machinery, ventilation fan machinery, and other industrial machinery.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 10 30 9 5.10  2.38  0.032  12 32 10 6.82  3.05  0.037  15 35 11 7.65  3.72  0.045  17 40 12 9.58  4.78  0.065  20 47 14 12.80  6.65  0.106  47 52 15 14.00  7.85  0.128  30 62 16 19.50  11.30  0.199  35 72 17 25.70  15.40  0.288  40 80 15 29.50  18.00  0.368  45 85 19 31.50  20.50  0.416  50 90 20 35.00  23.20  0.500  55 100 21 43.50  28.80  0.610  60 110 22 53.00  33.00  0.790  65 120 23 56.00  41.00  0.970  70 125 24 60.80  45.00  1.084  75 130 25 66.00  49.50  1.171  80 140 26 71.50  54.20  1.448  85 150 28 83.20  63.80  1.803  90 160 30 95.50  72.00  2.190  95 170 32 108.00  81.50  2.610  100 180 34 122.00  93.00  3.200  105 190 36 132.00  105.00  3.660  110 200 38 133.00  106.00  4.290  120 215 40 156.00  131.00  5.260  130 230 40 165.00  148.00  6.040  140 250 42 166.00  150.00  7.410  150 270 45 175.00  169.00  9.760  160 290 48 215.00  218.00  12.220  170 310 52 227.00  240.00  15.200  180 320 52 256.00  279.00  15.400  190 340 55 265.00  320.00  18.900  200 360 58 288.00  335.00  22.600  220 400 65 297.00  365.00  31.200  240 440 72 360.00  470.00  51.800  260 480 80 430.00  592.00  68.800 

3. Series

The series deep groove ball bearings can balance well in installing space, load capacity, weight, and allowable speed. Therefore, this series of bearings is one of the most frequently used bearings. series bearings use larger balls besides larger sizes of raceways. These allow the bearing to bear up to a larger load capacity for given diameters of bores. Just like the series, the series also finds very wide applications in household appliances, motorcycles, automobiles, food processing, chemical and pharmaceuticals, pumps, water treatment, fans, and many other industrial applications.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 10 35 11 7.65  3.48  0.053  12 37 12 9.72  5.08  0.060  15 42 13 11.50  5.42  0.082  17 47 14 13.50  6.58  0.115  20 52 15 15.80  7.88  0.142  25 62 17 20.60  11.30  0.232  30 72 19 26.70  15.00  0.346  35 80 21 33.40  19.30  0.457  40 90 23 40.80  24.00  0.639  45 100 25 52.80  31.80  0.837  50 110 27 62.00  38.00  1.070  55 120 29 71.50  45.00  1.390  60 130 31 82.00  48.50  1.710  65 140 33 92.50  59.50  2.100  70 150 35 105.00  68.00  2.550  75 160 37 113.00  77.20  3.100  80 170 39 123.00  86.50  3.610  85 180 41 132.00  96.50  4.284  90 190 43 145.00  108.00  4.970  95 200 45 157.00  122.00  5.740  100 215 47 173.00  140.00  7.090  105 225 49 184.00  153.00  8.050  110 240 50 205.00  178.00  9.530  120 260 55 228.00  242.00  12.200  130 280 58 253.00  242.00  14.770  140 300 62 275.00  272.00  18.330  150 320 65 288.00  295.00  21.870  160 340 68 313.00  340.00  26.430  170 360 72 335.00  378.00  31.140  180 380 75 358.00  396.00  35.230  190 400 78 379.00  438.00  39.450  200 420 80 391.00  496.00  46.890  220 460 88 410.00  520.00  52.450  240 500 95 442.00  585.00  59.460  260 540 102 507.00  710.00  64.230  280 580 108 572.00  850.00  73.670  300 620 109 590.00  920.00  85.340 

4. Series

The load of series deep groove ball bearings is higher in comparison with bearings of the same bore diameter. It mainly owing to the employment of larger balls and more optimized raceway design. The series bearings will thus be very suitable for the requirement load-carrying purposes, such as in electric motors, heavy machinery, various sorts of industrial equipment, and automotive parts, etc.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 17 62 17 22.70  10.80  0.270  20 72 19 31.00  15.20  0.400  25 80 21 36.10  19.40  0.530  30 90 23 43.40  23.90  0.735  35 100 25 55.00  31.00  0.952  40 110 27 65.50  37.50  1.221  45 120 29 77.50  45.50  1.520  50 130 31 92.00  55.00  1.855  55 140 33 100.00  62.00  2.310  60 150 35 109.00  70.00  2.780  65 160 37 118.00  78.50  3.250  70 180 42 143.00  103.00  4.730  75 190 45 153.00  114.00  5.570  80 200 48 164.00  125.00  6.630  85 210 52 165.00  136.00  8.120  90 225 54 193.00  158.00  9.470  95 240 55 204.00  171.00  13.400  100 250 58 224.00  195.00  12.800  110 280 65 225.00  238.00  18.340  130 340 78 246.00  278.00  33.700  140 360 82 278.00  345.00  45.700  150 380 85 291.00  478.00  59.300 

5. Series

The series deep groove ball bearings have ultra-thin square section cross-sectional area at the same aperture. They are smaller and lighter in the weight, have the low friction torque, application in compact semiconductor manufacturing equipment, precision machine tools, and aviation and astronomical instruments, mechanical rotary mechanisms, work turntables, etc.are applied.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 10 15 4 103.00  57.000  1.500  12 18 4 109.00  67.000  3.000  15 21 4 117.00  81.000  3.500  17 23 4 122.00  88.000  4.000  20 27 4 183.00  135.000  5.000  25 32 4 197.00  158.000  6.000  30 37 4 209.00  182.000  8.000  35 44 5 190.00  167.000  15.000  40 50 6 257.00  228.000  23.000  45 55 6 263.00  245.000  25.000 

6. Series

The series deep groove ball bearings are thin-section type bearings. This series of bearings has a thin square cross-section. Their outer diameter is very small and their width is very narrow. Therefore, the series ultra-thin deep groove ball bearing can be installed in a relatively large shaft and shaft diameter under the condition of limited installation space, and demonstrate prominent lightweight characteristics. The series bearings are suitable for applications where space is limited and need to carry high speeds, such as electronic appliances, aeronautics, medical appliances, and highly accurate machinery.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 10 19 5 1.80  0.93  0.005  12 21 5 1.90  1.00  0.005  15 24 5 2.10  1.30  0.005  17 26 5 2.20  1.50  0.007  20 32 7 3.50  2.20  0.015  25 37 7 4.30  2.90  0.017  30 42 7 4.70  3.60  0.019  35 47 7 4.90  4.00  0.023  40 52 7 5.10  4.40  0.026  45 58 7 6.40  5.60  0.030  50 65 7 6.60  6.10  0.043  55 72 9 9.10  8.40  0.070  60 78 10 9.10  8.70  0.093  65 85 10 11.90  11.50  0.130  70 90 10 12.10  11.90  0.138  75 95 10 12.50  12.80  0.147  80 100 10 12.70  13.30  0.155  85 110 13 19.20  19.80  0.245  90 115 13 19.50  20.50  0.258  95 120 13 19.80  21.30  0.270  100 125 13 20.10  22.00  0.280  105 130 13 20.30  22.70  0.300  110 140 16 28.10  30.70  0.500  120 150 16 28.90  32.90  0.540  130 165 18 37.90  42.90  0.736  140 175 19 38.20  44.30  0.784  150 190 20 49.10  57.10  1.114  160 200 20 49.60  59.10  1.176  170 215 22 61.50  73.30  1.545  180 225 22 62.30  75.90  1.621  190 240 24 75.10  91.60  2.100  200 250 24 74.20  91.20  2.178  220 270 24 76.40  97.80  2.369  240 300 28 83.50  108.00  4.500  260 320 28 95.00  128.00  4.850  280 350 33 135.00  178.00  7.400  300 380 38 162.00  206.00  10.400  320 400 38 164.00  220.00  11.400  340 420 38 169.00  227.00  11.600  360 440 38 173.00  242.00  12.200  380 480 46 232.00  320.00  20.500  400 500 46 235.00  335.00  21.000  420 520 46 238.00  345.00  22.200  440 540 46 241.00  355.00  23.600  460 580 56 305.00  480.00  34.300  480 600 56 315.00  610.00  36.000 

7. Series

The series deep groove ball bearings are also thin-section bearings, although the bearings of the series have an identical diameter with the series, series, series, and series, they are made with thin square cross-sections, making the series much smaller. As the series is lightweight and able to support relatively large shafts and shaft diameters in extremely confined space, they are ideal selections in high-performance applications, especially for those situations in which there are requirements for high speed and limited installation space, like aerospace, precision tools, medical devices, etc. Their lightweight characteristic could help reduce the weight of the whole machinery and improve energy efficiency and performance.

Size Inner Dimension (mm) Outer Dimension (mm) Width
 (mm) Dynamic Load
(kn） Static Load
(kn) Weight
(kg) 10 22 6 2.70  1.30  0.008  12 24 6 2.90  1.50  0.008  15 28 7 4.30  2.30  0.012  17 30 7 4.60  2.60  0.014  20 37 9 6.40  3.70  0.031  25 42 9 7.00  4.50  0.038  30 47 9 7.20  5.00  0.043  35 55 10 9.50  6.80  0.078  40 62 12 13.70  9.90  0.103  45 68 12 14.10  10.90  0.123  50 72 12 14.50  11.70  0.132  55 80 13 15.90  13.20  0.170  60 85 13 16.40  14.20  0.181  65 90 13 17.40  16.00  0.196  70 100 16 23.70  21.10  0.336  75 105 16 24.30  22.50  0.355  80 110 16 24.90  23.90  0.375  85 120 18 31.90  29.70  0.507  90 125 18 32.80  31.50  0.533  95 130 18 33.70  33.30  0.560  100 140 20 42.70  41.90  0.770  105 145 20 46.30  44.80  0.805  110 150 20 47.80  47.70  0.840  120 165 22 57.20  56.90  1.150  130 180 24 69.40  70.00  1.496  140 190 24 71.20  74.60  1.600  150 210 28 88.40  93.00  3.050  160 220 28 92.30  98.00  3.250  170 230 28 93.60  106.00  3.400  180 250 33 118.00  134.00  5.050  190 260 33 117.00  134.00  5.250  200 280 38 149.00  168.00  7.400  220 300 38 152.00  178.00  8.000  240 320 38 159.00  200.00  8.600  260 360 46 212.00  270.00  14.500  280 380 46 216.00  285.00  15.500  320 440 56 214.00  395.00  24.900  340 460 56 282.00  420.00  27.000 

8. Series

The series deep groove ball bearings are ball bearings commonly used in various industrial applications. They can take both radial and axial loads in both directions. They have deep raceway grooves and a special design to carry hefty radial and axial loads while keeping low friction. The series deep groove ball bearings are known for their durability, high-speed performance, and long service life. They are available in a range of sizes and configurations to suit different applicative needs. They are widely applied in various industries like automobiles, machinery, agriculture, and so on.

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