TIMKEN 6303-2RS 17x47x14 Sealed Deep Groove Ball Bearing

TIMKEN 6303-2RS 17x47x14 Sealed Deep Groove Ball Bearing

TIMKEN 6303-2RS is a sealed single-row deep groove ball bearing with nominal dimensions of 17x47x14 mm. The bore diameter d is 17 mm, outside diameter D is 47 mm and width B is 14 mm. The 2RS version has two contact seals, closing and protecting the internal bearing space on both sides.

TIMKEN 6303-2RS – characteristics

TIMKEN 6303-2RS belongs to the 63 series of deep groove ball bearings.

The key characteristics of this reference include:

• single-row construction,
• deep groove ball bearing design,
• dimensions of 17x47x14 mm,
• cylindrical bore,
• two contact seals,
• sealing on both sides,
• suitability primarily for radial loads,
• ability to accommodate axial loads in both directions within the limits of the bearing arrangement.

The 6303-2RS should be distinguished from an open 6303 bearing and from 6303 variants using different sealing arrangements.

Dimensions of TIMKEN 6303-2RS

The dimensional sequence is d x D x B:

d – bore diameter 17 mm
D – outside diameter 47 mm
B – bearing width 14 mm

The 17x47x14 mm dimensions correspond to the standard dimensional envelope of a 6303 deep groove ball bearing.

Bearing construction

TIMKEN 6303-2RS is a single-row deep groove ball bearing.

The inner and outer rings incorporate deep raceway grooves operating with a single row of balls.

This geometry allows the bearing to accommodate primarily radial loads, while deep groove ball bearings can also support axial loads acting in both directions.

In the 6303-2RS version, the internal bearing space is protected by contact seals on both sides.

What does 2RS mean?

The designation 2RS identifies the sealing configuration.

RS – one contact seal
2RS – two contact seals

TIMKEN 6303-2RS therefore has one contact seal on each side of the bearing.

The seals help:

• retain lubricant inside the bearing,
• restrict the ingress of contaminants,
• protect the internal rolling contact surfaces during operation.

This sealing configuration is an important functional difference between 6303-2RS and an open 6303 bearing.

Why is the seal type important?

Two bearings with identical dimensions of 17x47x14 mm can have different sealing arrangements.

A contact seal touches the corresponding sealing surface of the bearing ring. This provides protection for the internal bearing space but also influences friction and speed characteristics.

For this reason, 2RS is a functional part of the complete bearing designation, not merely an additional description.

Radial and axial loads

TIMKEN 6303-2RS belongs to the deep groove ball bearing family.

Its primary load direction is radial.

The deep raceway geometry also enables this bearing type to accommodate axial loads in both directions.

The permissible combination of radial and axial loading depends on the actual operating conditions, including speed, fits, temperature, lubrication and required bearing life.

TIMKEN 6303-2RS vs open 6303

Both versions have the same nominal dimensions:

17x47x14 mm

However, their closure configuration differs.

An open 6303 should therefore not automatically be treated as technically identical to 6303-2RS simply because the principal dimensions are the same.

6303-2RS vs 6303-2RZ

The designations 2RS and 2RZ should not be treated as synonyms.

2RS identifies a configuration with two contact seals.

A version using non-contact seals has different friction, sealing and speed characteristics.

When evaluating an alternative bearing, the exact sealing arrangement should therefore be compared rather than relying only on the basic 6303 designation.

Internal clearance – important note

The product designation supplied is:

TIMKEN 6303-2RS

without the additional C3 suffix.

For this reason, C3 radial internal clearance should not be assigned to this product.

If an application specifically requires increased C3 radial clearance, the corresponding TIMKEN reference containing the C3 designation should be selected and verified separately.

This distinction is also important for product identification and search visibility.

What does 6303-2RS mean?

The complete designation can be interpreted as:

6303 – 63-series deep groove ball bearing with 17x47x14 mm dimensions
2RS – two contact seals
TIMKEN – manufacturer

For purchasing, maintenance and technical identification, the complete reference:

TIMKEN 6303-2RS

should be used.

Selecting an equivalent for TIMKEN 6303-2RS

When evaluating an equivalent bearing, verify at least:

1. bearing type – single-row deep groove ball bearing,
2. bore diameter d – 17 mm,
3. outside diameter D – 47 mm,
4. width B – 14 mm,
5. cylindrical bore,
6. sealing on both sides,
7. contact seal design,
8. required radial internal clearance,
9. dynamic and static load ratings,
10. permissible speed,
11. cage construction,
12. lubrication requirements.

Matching dimensions of 17x47x14 mm alone do not establish full technical interchangeability.

A bearing from another manufacturer should be compared using the complete technical specification and the requirements of the specific bearing arrangement.

Technical specification

FAQ – TIMKEN 6303-2RS

What are the dimensions of TIMKEN 6303-2RS?

TIMKEN 6303-2RS measures 17x47x14 mm: bore diameter d 17 mm, outside diameter D 47 mm and width B 14 mm.

What type of bearing is TIMKEN 6303-2RS?

It is a single-row deep groove ball bearing sealed on both sides.

What does 2RS mean?

2RS means that the bearing has two contact seals, one on each side.

Is TIMKEN 6303-2RS an open bearing?

No. The 2RS version is closed on both sides by contact seals.

Does TIMKEN 6303-2RS have C3 clearance?

C3 should not be assumed. The supplied designation is 6303-2RS without a C3 suffix. A C3 version must be identified by its complete manufacturer reference.

Can TIMKEN 6303-2RS carry axial loads?

Deep groove ball bearing geometry allows the bearing to accommodate radial loads and axial loads acting in both directions, subject to the operating limits of the specific bearing arrangement.

What is the difference between 6303 and 6303-2RS?

Both have nominal dimensions of 17x47x14 mm. The standard 6303 is open, while 6303-2RS has two contact seals.

Can any 17x47x14 mm bearing replace TIMKEN 6303-2RS?

Not automatically. Seal type, internal clearance, load ratings, permissible speed, cage construction and the requirements of the specific application should also be compared.

AI Overview

TIMKEN 6303-2RS is a sealed single-row deep groove ball bearing measuring 17x47x14 mm. The 2RS configuration uses two contact seals, one on each side, helping retain lubricant and restrict contaminant ingress. Deep-groove raceway geometry is designed primarily for radial loads while also allowing axial loads in both directions.