Single Row Deep Groove Ball Bearing

Single row deep groove ball bearings are available in two designs: open or closed seals (with seals or dust caps). Open bearings can also be fitted with seals or dust caps, and generally have grooves on the side of the inner ring.


Closed bearing

Users can choose different sealing devices according to the instructions of Table 1 according to different operating conditions. However, these instructions are not a substitute for practical application testing of dust caps or seals. For more information, see Integral Seals .

The seal is installed in the groove of the outer ring, which makes good contact with the groove and does not cause deformation of the outer ring. The sealing devices are:

Dust cover (model suffix Z)

  • Mainly used in the working condition of inner ring rotation
  • Installed in the outer ring and form a narrow gap with the inner ring
  • Made of stamped steel
  • The standard configuration has an extension in the dust hole , some extensions are expected
  • Prevents friction losses from dirt and debris

Non-contact seal (model suffix RZ, )

  • Provide better sealing effect than dust cap
  • Can be operated at the same speed as the dust cover
  • A very narrow gap with the shoulder of the inner ring
  • Made of steel reinforced NBR (oil and abrasion resistant)

Low friction seal (designation suffix RSL or RST)

  1. Provides better sealing results than non-contact seals
  2. Made of steel reinforced NBR (oil and abrasion resistant)

RSL design :

  1. Can be operated at the same speed as the dust cover
  2. Little contact with the groove in the shoulder of the inner ring
  3. Available in two designs for 60, 62, 63 series bearings, depending on size 

RST design :

  1. Positive contact with the groove in the shoulder of the inner ring for good sealing
  2. Three RST designs available for 60, 62, 63 series bearings, depending on size

Contact seals (designation suffix RSH, RSH2, RS1 or RS2)

  • Made of reinforced steel plate
    1. NBR
    2. FKM (model suffix RS2 or RSH2, available on request)
  • Different designs are available depending on the bearings they use:
    1. Two RSH designs available for 60, 62, 63 series bearings depending on size
    2. RS1 is designed to seal the groove on the shoulder of the inner ring or on the side of the inner ring ; the relevant design is determined by the size d 1or d 2 in the product table.


ICOS oil sealed bearing unit

  • Usually used in applications that exceed standard sealing solution capabilities, i.e. oil retention
  • The following advantages over bearings with external sealing solutions:
    • Less axial displacement
    • Simplified installation
    • The inner ring shoulder can be used as an ideal sealing mating surface, thus reducing the expensive cost of shaft machining
  • Includes a deep groove ball bearing of the 62 series and a SKF WAVE seal;
    • A spring-loaded radial shaft seal with a single sealing lip 
    • Made of NBR
  • The limit speed in the product table is the peripheral speed allowed by the seal (14 m / s)



Bearing Parameters

Size standard

Dimensions: GB / T273.3 standard
Stop ring and stop groove: GB / T305 standard


According to customer needs, from P0 ~ P5.
Tolerance: GB / T307.1 standard

Internal clearance

Radial clearance: GB / T4604 standard





Deep groove ball bearings

Minimum load 

If the minimum load cannot be reached, consider preload.

Axial load capacity

Pure axial load→ Fa ≤ 0,5 C0 
Small bearings1) And light series bearings 2) → Fa ≤ 0.25 C0 

Excessive axial load results in greatly reduced bearing working life.


2)Diameter series 8, 9, 0 and 1





Basic static load rating [kN]

  • Single bearing
  • Paired bearings(→ Load carrying capacity of matched bearing pairs)


Average bearing diameter [mm] = 0.5 (d + D) 


The limit of the load rate depends on f0 FaC:0  


Calculation factor


Axial load[kN]


Radial load[kN]


Minimum radial load[kN]


Minimum load factor


Rotating speed [r/min]


Bearing equivalent dynamic load [kN]


Bearing equivalent static load [kN]


Calculation factor for radial load(

Y, Y1, Y2

The calculation factor for axial load depends onf0 FaC:0 


n = Actual working viscosity of lubricant [mm2/s]

Temperature Limit

The allowable operating temperature of deep groove ball bearings depends on:

Dimensional stability of bearing rings and steel balls

· Cage

· Seals

· Lubricant

When the temperature exceeds the allowable range or falls below 0 ° C

Bearing rings and steel balls

Deep groove ball bearings have a thermal stability of at least 120 ° C (250 ° F).


Steel, stainless steel, brass or PEEK cages operate at the same temperature as bearing rings and steel balls. Temperature limits for cages made of other polymer materials.

The allowable operating temperature of the seal depends on the seal material:

  • NBR: -40 To +100 °C (–40 to +210 °F) 
    Can withstand temperatures up to 120 ° C (250 ° F) in a short time
  • FKM: -30 To +200 °C (–20 to +390 °F) 
    Can withstand temperatures up to 230 ° C (445 ° F) for a short period of time

Usually, the temperature peak is mostly at the sealing lip. 


Allowable Speed

Allowable Speed

The rated speed indicates:

  • This reference speed enables rapid evaluation of speed capabilities from a thermal reference frame
  • The limit speed is a mechanical limit. Unless the bearing design and application are adapted to higher speeds, this limit should not be exceeded.


For bearings with a ring-centered cage (suffix MA or MB), oil lubrication is recommended. If grease is used to lubricate these bearings, the ndm value will be limited to 250 000 mm / min. 



Average bearing diameter [mm] = 0.5 (d + D) 


Rotating speed [r/min]