# Deep groove ball bearings

## Description

Single-row deep groove ball bearings carry not only radial, but also axial forces and are very versatile. They have a simple design, are non-detachable, and can be used at high to very high speeds. In comparison with other bearing types, these bearings are robust. Minor angular deviations are permissible during operation. These characteristics make deep groove ball bearings the type of roller bearings most often used.

## Dimensions/standards

In single-row deep groove ball bearings, the major dimensions are standardized according to ISO 15 (Radial bearings – boundary dimensions), DIN 616 (Roller bearings – boundary dimensions) or DIN 625-1 (Radial deep groove ball bearings).

In many cases, deep groove ball bearings with a circular groove in the outer ring simplify the design, attaching them axially in the housing by means of a retainer ring is easy and saves space. These bearings with/ without retainer ring are standardized according to ISO 464 and DIN 5417 and can be delivered upon request.

## Tolerances

SLF produces deep groove ball bearings with standard tolerances (PN) according to DIN 620-2 (Roller bearing tolerances – tolerances for radial bearings) and ISO 492 (Radial bearings – dimensions and tolerances). We can also supply other tolerance classes or special tolerances upon request.

## Bearing design types

The SLF standard portfolio comprises deep groove ball bearings in the 618, 619, 160, 60, 62, 63 and 64 series. Except for the 618, 619, and 160 series, all are batch-produced with recesses for packing disks or shields. All deep groove ball bearings are made of high-quality certified quality roller bearing steel and are equipped with a sheet metal cage.

Deep groove ball bearings, single row, wide series 630.., 622.. , and 623…
In terms of inner structure and characteristics, single-row deep groove ball bearings in the wide series are like single-row deep groove ball bearings, but have wider rings. As a result, specifically for sealed deep groove ball bearings, there is a larger grease reservoir to keep more grease in reserve, as well as offer longer grease operational time. SLF manufactures wide deep groove ball bearings with/ without packing disks. We supply other design types upon request. Complete bearing designation includes the prefix and/ or suffix.

## Clearance

As the default, SLF supplies deep groove ball bearings according to DIN 620-4 (Roller bearing tolerances – radial clearance) and ISO 5753-1 (Roller bearings – clearance – radial clearance) in clearance class CN (also the commonly used C0). Design types in other clearance classes or special clearance can be delivered upon request.

Clearance tables

## Cage

Deep groove ball bearings without cage-suffix are equipped with a steel sheet cage. Different cage designs are indicated after the bearing type as a designation suffix. Deep groove ball bearings with cages made of fiberglass-reinforced polyamide 66 (TVP) are suitable for constant higher temperatures up to 120°C over the long term. In case of oil lubrication, additives contained in the oil may reduce the cage’s operational life if the temperature is greater than 100°C over a longer time. We can also deliver deep groove ball bearings with a brass cage, M-guided by rolling elements and MA-guided by shoulder on outer ring, as well as in current-insulated design upon request.

## Working temperature

SLF-deep groove ball bearings with a maximum 240 mm outer diameter are standard stabilized in dimension (S0), meaning that they are subjected to heat treatment that makes them usable up to a working temperature of 150 °C. For outer diameters equal to and greater than 240 mm, the deep groove ball bearings are standard stabilized in dimension (S1), meaning that they are heat treated to make them usable up to a working temperature of 200 °C. However, as a rule, the maximum working temperature is not limited by the dimensional stability of the bearing rings and balls. Cage, sealing or lubricant are often the limiting factors. Please find the necessary information in the relevant chapters. If you are uncertain or have specific questions regarding our bearings’ temperature limits, don’t hesitate to contact the SLF team.

## Greasing/lubrication & sealing

Deep groove ball bearings with packing disks (contacting sealing) or with shields (contact-free sealing) make possible simple design. We offer bearings both with one or two packing disks (RSR/2RSR) or shields (ZR/2ZR).

Bearings with sealing on both sides are filled with a high-quality lithium-saponified roller bearing grease (bearings with D≤62mm) or with a high-performance grease -EP-grease (bearings with D>62mm) based on an age-resistant mineral oil.
Sealed bearings can be used from – 20°C to max. 110°C (short term) in case of contacting and up to maximum120°C for contact-free sealing. Please note that the operation life of the grease is reduced at a constant temperature >70°C. In cases like these, we recommend applying special grease customized for this purpose.

## Dimensioning


 $$P = F_r$$ for $$\frac{F_a}{F_r} \leq{e}$$ $$P = X * F_r + Y * F_a$$ for $$\frac{F_a}{F_r} > e$$


 $$P_0 = F_{0r}$$ for $$\frac{F_{0a}}{F_{0r}} \leq{0,8}$$ $$P_0 = 0,6 * F_{0r} + 0,5 * F_{0a}$$ for $$\frac{F_{0a}}{F_{0r}} > 0,8$$

### Factors e, X and Y for deep groove ball bearings

CN C3 C4
e X Y e X Y e X Y
0,30,220,5620,320,461,70,40,441,4
0,50,240,561,80,350,461,560,430,440,31
0,90,280,561,580,390,461,410,450,441,23
1,60,320,561,40,430,461,270,480,441,16
30,360,561,20,480,461,140,520,441,08
60,430,5610,540,4610,560,441
 Fa axial load [kN] C0r static load rating [kN] f0 factor [-]

### Factor f0 for deep groove ball bearings

Bore reference numberRow 618 619 160 60 62 622 63 623 64
Factor f0
0014,814,012,412,112,111,3
0115,314,513,012,312,211,1
0215,814,313,913,913,113,112,112,1
0316,114,714,314,313,113,112,312,212,4
0415,814,514,913,913,113,112,412,113,0
0516,315,215,414,513,813,812,412,413,1
0616,515,615,214,813,813,813,013,012,2
0716,315,515,614,813,813,813,113,112,1
0816,115,416,015,314,014,013,013,012,2
0916,215,715,915,414,314,113,013,012,1
1016,116,016,115,614,314,313,013,013,1
1116,216,016,115,414,314,312,912,913,2
1216,316,116,315,514,314,313,113,113,2
1316,216,316,415,714,313,213,2
1416,116,116,215,514,413,213,3
1516,016,216,415,714,713,213,3
1615,916,416,415,614,613,212,3
1716,216,316,415,714,713,112,3
1816,116,416,315,614,513,912,5
1916,016,516,315,614,513,912,9
2016,016,316,515,914,413,813,1
2115,916,416,315,814,313,813,2
2216,116,516,315,614,313,813,1
2416,016,416,515,914,813,513,1
2616,116,416,415,814,513,613,0
2816,016,516,516,014,813,613,0
3016,116,316,416,015,213,713,3
3216,016,416,516,015,213,913,4
3416,116,516,415,715,313,913,4
3616,016,416,315,615,313,913,4
3816,016,516,415,815,014,013,4
4016,016,316,315,615,314,113,4
4415,916,516,315,615,214,113,4
4815,916,416,515,815,214,213,4
5215,916,416,415,715,214,613,4
5616,016,516,515,915,314,513,3
6016,016,316,415,715,314,613,4
6415,916,416,515,915,014,9
6815,916,516,315,815,214,7
7215,816,416,415,915,314,9
7616,016,516,516,015,414,8
8015,916,516,515,815,514,9
8415,916,416,515,915,615,0
8815,816,516,515,915,514,9
9216,016,516,515,915,714,9
9615,916,516,416,015,615,0
50015,916,416,416,115,514,8
53015,816,416,415,915,514,9
560…85015,816,316,415,915,515,0

Für statisch beanspruchte Rillenkugellager ist neben der nominellen Lebensdauer L (L10h) immer die statische Tragsicherheit S0 zu überprüfen.

$$S_0 = \frac{C_0}{P_0}$$

$$P > \frac{C_0}{100}$$