SKF 6309-2RS1 45x100x25 mm - Deep Groove Ball Bearing

SKF 6309-2RS1 45x100x25 mm - Deep Groove Ball Bearing

SKF 6309-2RS1 is a single-row deep groove ball bearing measuring 45x100x25 mm, with a cylindrical bore and contact seals on both sides. The 2RS1 version is factory grease lubricated and protected against contamination. The bearing has normal CN internal clearance, a sheet steel cage and belongs to the SKF Explorer performance class.

Technical Data - SKF 6309-2RS1

What Does SKF 6309-2RS1 Mean?

The complete designation:

SKF 6309-2RS1

precisely identifies the bearing variant.

SKF is the manufacturer.

6 identifies a single-row deep groove ball bearing.

63 identifies the dimensional series within the deep groove ball bearing family.

09 is the bore code. For bore codes from 04 upwards, the code is multiplied by 5:

09 x 5 mm = 45 mm

2RS1 identifies contact seals on both sides of the bearing.

The absence of the additional C3 suffix means that this version is not 6309-2RS1/C3. SKF specifies normal internal clearance:

CN

for SKF 6309-2RS1.

SKF 6309-2RS1 Dimensions

The principal dimensions are:

45x100x25 mm

where:

• d = 45 mm - bore diameter
• D = 100 mm - outside diameter
• B = 25 mm - bearing width

Additional catalogue dimensions include:

• d1 = approx. 62.18 mm
• D2 = approx. 86.7 mm
• r1,2 min. = 1.5 mm

The 45x100x25 mm dimensions are essential for identification, but they are not the only criteria for interchangeability.

Seal design, internal clearance, load ratings, speed and the requirements of the specific bearing arrangement should also be verified.

SKF 6309-2RS1 Construction

SKF 6309-2RS1 is a non-separable, single-row deep groove ball bearing.

Its construction includes:

• inner ring,
• outer ring,
• deep raceway grooves,
• one row of balls,
• sheet steel cage,
• contact seal on both sides,
• factory grease fill.

Deep groove raceway geometry enables the bearing to carry primarily radial loads while also accommodating axial loads in both directions within the operating capabilities of a single-row deep groove ball bearing.

SKF 2RS1 Sealing

The suffix:

2RS1

is an important part of the complete product designation.

It identifies a bearing with:

contact seals on both sides

The seals help to:

• retain grease inside the bearing,
• reduce the ingress of contaminants,
• protect the balls and raceways,
• maintain suitable lubrication conditions inside the bearing.

SKF 6309-2RS1 is supplied factory grease lubricated.

The seals should not be removed simply to add grease before standard installation.

CN Internal Clearance

SKF 6309-2RS1 without an additional C3 suffix has:

normal internal clearance CN

This is important when selecting a replacement.

Another version available within the same bearing family is:

SKF 6309-2RS1/C3

which has internal clearance greater than normal.

Both variants measure 45x100x25 mm, but the difference in internal clearance can be significant in operation.

The required internal clearance depends on factors including:

• shaft and housing fits,
• operating temperature,
• rotational speed,
• load,
• temperature differences between the bearing rings.

SKF 6309-2RS1 Load Ratings

SKF specifies:

C = 55.3 kN

Basic dynamic load rating.

C0 = 31.5 kN

Basic static load rating.

Pu = 1.34 kN

Fatigue load limit.

These parameters apply specifically to SKF 6309-2RS1 and are relevant when calculating bearing life and selecting a bearing for defined operating conditions.

SKF 6309-2RS1 Limiting Speed

SKF specifies:

4500 r/min

as the limiting speed for 6309-2RS1.

Speed values specified for an open 6309 or a shielded 6309-2Z should not automatically be applied to the 6309-2RS1 version.

The closure type influences friction and thermal operating conditions.

SKF 6309-2RS1 Mass

The catalogue mass is approximately:

0.84 kg

Small differences between masses shown in different product databases may result from rounding.

SKF 6309-2RS1 vs SKF 6309

Both variants have the principal dimensions:

45x100x25 mm

but they are not identical versions.

SKF 6309-2RS1 has contact seals on both sides and is supplied factory grease lubricated.

The standard open:

SKF 6309

does not have the same double-sided 2RS1 sealing arrangement.

Selection should consider lubrication method, environmental contamination, speed and the design of the complete bearing arrangement.

SKF 6309-2RS1 vs SKF 6309-2Z

Both variants measure:

45x100x25 mm

but use different closure systems.

SKF 6309-2RS1 - contact seals on both sides.

SKF 6309-2Z - sheet steel shields on both sides.

The 2RS1 version and the 2Z version differ in sealing performance, friction and permissible operating conditions.

They should therefore not be considered technically identical simply because their mounting dimensions are the same.

SKF 6309-2RS1 vs SKF 6309-2RS1/C3

Both variants have:

• d = 45 mm
• D = 100 mm
• B = 25 mm
• 2RS1 seals on both sides

However, their internal clearance differs.

SKF 6309-2RS1 - normal CN internal clearance.

SKF 6309-2RS1/C3 - C3 internal clearance, greater than normal.

The C3 version should not automatically replace the CN version without checking the requirements of the specific application.

6309 2RS SKF vs SKF 6309-2RS1

In trade and online searches, this product is frequently described as:

6309 2RS SKF

SKF 6309 2RS

6309-2RS SKF

These are common commercial search terms for a double-sealed SKF 6309 bearing.

For precise technical identification, however, the manufacturer's complete designation should be used:

SKF 6309-2RS1

For this reason, the exact designation should be used in the product name, H1 and technical specification, while "6309 2RS SKF" can be included naturally in the content as a common search variant.

Alternative Designations and Search References

Natural search variations include:

SKF 6309-2RS1

6309-2RS1 SKF

SKF6309-2RS1

6309 2RS1 SKF

6309 2RS SKF

6309-2RS SKF

SKF 6309 2RS

SKF 6309-2RS1 45x100x25

6309 SKF 45x100x25

6309 45x100x25 SKF

SKF 6309 sealed bearing

SKF 6309 rubber sealed bearing

For technical identification and ordering, the recommended complete designation is:

SKF 6309-2RS1

How to Select a Replacement for SKF 6309-2RS1

Before selecting a replacement, verify:

• complete designation,
• d = 45 mm,
• D = 100 mm,
• B = 25 mm,
• bearing type,
• number of rows,
• sealing arrangement,
• internal clearance,
• cage construction,
• dynamic load rating,
• static load rating,
• required rotational speed,
• shaft fit,
• housing fit,
• operating temperature,
• lubrication conditions,
• contamination level.

The designation 6309 or dimensions 45x100x25 mm alone do not confirm complete interchangeability between all variants.

Suffixes such as 2RS1, 2Z and C3 are technically significant.

Typical Applications of the 6309-2RS1 Design

SKF 6309-2RS1 belongs to the family of single-row deep groove ball bearings.

This type of bearing is suitable for bearing arrangements requiring:

• radial load carrying capability,
• axial load carrying capability in both directions within the limits of the design,
• compact bearing construction,
• sealing on both sides,
• factory grease lubrication,
• protection of the bearing interior against contamination.

Selection for a specific machine should be based on the actual operating parameters of the bearing arrangement rather than dimensions alone.

SKF 6309-2RS1 Installation

During installation:

• keep the bearing, shaft and housing clean,
• verify the dimensions and tolerances of the bearing seats,
• apply mounting force to the ring being press fitted,
• do not transmit mounting force through the balls,
• protect the raceways against impact loads,
• avoid damaging the 2RS1 seals,
• do not remove the seals without a justified technical reason,
• protect the bearing against contamination during installation.

Until installation, the bearing should preferably remain in its original packaging and be stored in a clean, dry environment.

FAQ

What are the dimensions of SKF 6309-2RS1?

SKF 6309-2RS1 measures 45x100x25 mm. The bore diameter is 45 mm, outside diameter is 100 mm and bearing width is 25 mm.

What does 2RS1 mean in SKF 6309-2RS1?

The suffix 2RS1 identifies contact seals on both sides of the bearing. The seals help retain grease and protect the bearing interior against contaminants.

Is 6309 2RS SKF the same as SKF 6309-2RS1?

"6309 2RS SKF" is a common commercial and online search description for a double-sealed SKF 6309 bearing. The precise SKF designation for the product described here is SKF 6309-2RS1.

Does SKF 6309-2RS1 have C3 clearance?

No. The version without the C3 suffix has normal internal clearance CN. The greater-than-normal clearance version is designated SKF 6309-2RS1/C3.

What are the load ratings of SKF 6309-2RS1?

SKF specifies a basic dynamic load rating C = 55.3 kN, basic static load rating C0 = 31.5 kN, and fatigue load limit Pu = 1.34 kN.

What is the limiting speed of SKF 6309-2RS1?

The limiting speed is 4500 r/min.

How much does SKF 6309-2RS1 weigh?

The catalogue mass is approximately 0.84 kg.

Can SKF 6309-2Z replace SKF 6309-2RS1?

Both versions measure 45x100x25 mm, but they use different closure systems. 2RS1 identifies contact seals, while 2Z identifies sheet steel shields. Replacement suitability should therefore be evaluated according to the operating conditions.

SKF 6309-2RS1 - Quick Answer

SKF 6309-2RS1 is a single-row deep groove ball bearing measuring 45x100x25 mm, equipped with contact seals on both sides. It has normal CN internal clearance and a sheet steel cage. SKF specifies C = 55.3 kN, C0 = 31.5 kN, Pu = 1.34 kN and a limiting speed of 4500 r/min.

Available from simmering.pl, a specialist B2B supplier of bearings and technical sealing solutions for industry, maintenance departments and technical service companies. Stock in Poland with worldwide shipping.