Deep groove ball bearings are the most widely used bearing type and are particularly versatile. They have low friction and are optimized for low noise and low vibration which enables high rotational speeds. They accommodate radial and axial loads in both directions, are easy to mount, and require less maintenance than other bearing types.

The SKF bearing catalogue lists a large range of designs, variants and sizes of deep groove ball bearings. Beyond our catalogue offering, the SKF Explorer deep groove ball bearings are customizable to offer advantages for applications with specific performance needs.

DESIGNS AND VARIANTS

Single row deep groove ball bearings

Stainless steel deep groove ball bearings

Single row deep groove ball bearings with filling slots

Double row deep groove ball bearings

Product details

Bearing data

Loads

Temperature limits

Permissible speed

Designation system

The seals, which are fitted in a recess on the outer ring, make good, positive contact with the recess, without deforming the outer ring. The capping devices are available as:

Capped bearing

Shields

are identified by the designation suffix Z

are primarily intended for applications where the inner ring rotates

are fitted in the outer ring and form a narrow gap with the inner ring

are made of sheet steel

are available as standard with an extension in the shield bore , expect some sizes without extension

protect from dirt and debris without friction losses

Non-contact seals

are identified by the designation suffix RZ

provide better sealing effectiveness than shields

can be operated at the same speeds as shields

form an extremely narrow gap with the inner ring shoulder

are made of sheet steel reinforced NBR (oil- and wear-resistant)

Low-friction seals

are identified by the designation suffixes RSL or RST

provide better sealing effectiveness than non-contact seals

are made of sheet steel reinforced NBR (oil and wear-resistant)

RSL design

can be operated at the same speeds as shields

make virtually no contact with a recess in the inner ring shoulder

are available for 60, 62, 63 series bearings in two designs, depending on the size

RST design

make positive contact with a recess in the inner ring shoulder for good sealing effectiveness

are available on request for 60, 62 and 63 series bearings in three RST designs, depending on the size

Contact seals

are identified by the designation suffixes RSH, RSH2, RS1 or RS2

are made of sheet steel reinforced

NBR

FKM (designation suffix RS2 or RSH2, available on request)

are available in different designs depending on the bearing they are used with:

for 60, 62 and 63 series bearings in two RSH designs , depending on the size

for RS1 designs, with sealing either against the inner ring shoulder or against a recess in the inner ring side face , the relevant design is determined by dimension d1 or d2 in the product table.

Bearings capped on both sides are lubricated for the life of the bearing and are virtually maintenance-free. They are filled with one of the following greases:

standard deep groove ball bearings

inch deep groove ball bearings

D < 63.5 mm → MT47

D ≥ 63.5 mm → MT33

On request, bearings can be supplied with the following special greases:

high temperature grease GJN

wide temperature range grease HT or WT

wide temperature range and low-noise grease LHT23

low temperature grease LT

The technical specifications of the various greases are listed in table 3.

The standard grease is not identified in the bearing designation (no designation suffix). Special greases are indicated by the corresponding grease suffix. Check availability of bearings with special grease prior to ordering.

Grease life for capped bearings

is presented as L10, i.e. the time period at the end of which 90% of the bearings are still reliably lubricated (diagram 1)

depends on:

the operating temperature

the ndm value

grease performance factor (GPF)

The indicated grease life is valid under this combination of operating conditions:

horizontal shaft

inner ring rotation

light load (P ≤ 0,05 C)

operating temperature within the green temperature zone of the grease (table 3)

stationary machine

low vibration levels

Where the operating conditions differ as described below, the grease life obtained from the diagram should be adjusted:

vertical shafts → 50% of the obtained value

heavier loads (P > 0,05 C) → apply reduction factor (table 4)

When capped bearings must operate under certain extreme conditions, such as very high speeds or high temperatures, grease may appear on the capping diameter. For bearing arrangements where this would be detrimental, appropriate actions could be taken. For additional information, contact the SKF distributor Alier(HongKong)Bearing Co.,Ltd