SKF 6204-2Z 20x47x14 Deep Groove Ball Bearing

SKF 6204-2Z is a single-row deep groove ball bearing measuring 20x47x14 mm. It has a 20 mm bore diameter, 47 mm outside diameter and 14 mm width. The 2Z configuration has non-contact shields on both sides, while SKF specifies CN radial internal clearance, a cylindrical bore and grease lubrication for this exact reference.

SKF 6204-2Z - Product Characteristics

SKF 6204-2Z belongs to the 62 dimensional series of single-row deep groove ball bearings. The commercial designation 6204 ZZ SKF is commonly used to describe the double-shielded configuration, while SKF uses 6204-2Z as the manufacturer designation.

Verified technical data:

Manufacturer / Brand: SKF
Designation: 6204-2Z
Commercial designation: 6204 ZZ
Bearing Type: Single-row deep groove ball bearing
Dimensions: 20x47x14 mm
Number of Rows: 1
Bore Type: Cylindrical
Closure: Shields on both sides
Closure Type: Non-contact
Radial Internal Clearance: CN
Lubrication: Grease
Bearing Material: Bearing steel
Basic Dynamic Load Rating C: 13.5 kN
Basic Static Load Rating C0: 6.55 kN
Fatigue Load Limit Pu: 0.28 kN
Reference Speed: 32,000 r/min
Limiting Speed: 17,000 r/min
Net Mass: approximately 0.107-0.11 kg.

Dimensions

The principal dimensions of SKF 6204-2Z are:

d - Bore Diameter: 20 mm
D - Outside Diameter: 47 mm
B - Width: 14 mm
Commercial Size: 20x47x14 mm

For this bearing, the dimensional notation 20x47x14 mm corresponds to d x D x B.

The bore code 04 corresponds to a nominal bore diameter of 20 mm.

Bearing Construction

SKF 6204-2Z is a single-row deep groove ball bearing. The balls operate between deep raceway grooves in the inner and outer rings.

This deep groove geometry enables the bearing to accommodate primarily radial loads while also supporting axial loads acting in both directions.

The bearing has a non-separable basic construction and cylindrical bore. SKF confirms one row of rolling elements and bearing-steel construction for the exact 6204-2Z reference.

2Z Non-Contact Shields

The suffix 2Z is an essential part of this bearing's identification.

For SKF 6204-2Z, the manufacturer specifies:

Closure: shield on both sides
Closure type: non-contact.

The shields help retain lubricant within the bearing and restrict the entry of contaminants. Because the shields are non-contact, they do not operate in the same way as contact seals used on sealed SKF bearing variants.

This distinction is important when comparing 6204-2Z with 6204 bearings carrying rubber sealing configurations.

CN Radial Internal Clearance

SKF specifies CN radial internal clearance for the standard 6204-2Z reference.

This differentiates it from 6204-2Z/C3, which SKF lists as a separate product. The C3 version has a different radial internal clearance group.

Therefore:

6204-2Z ≠ 6204-2Z/C3

even though both bearings have the same principal dimensions of 20x47x14 mm and shields on both sides.

Load Ratings and Operating Principle

SKF catalogue data for 6204-2Z specify:

C - Basic Dynamic Load Rating: 13.5 kN
C0 - Basic Static Load Rating: 6.55 kN
Pu - Fatigue Load Limit: 0.28 kN.

The deep groove raceway geometry enables the bearing to support radial loads together with axial loads acting in either direction.

C, C0 and Pu are catalogue engineering parameters used in bearing selection and life calculations. They should not be interpreted as simple maximum permissible machine loads.

Correct selection requires consideration of the actual load, rotational speed, required rating life, shaft and housing fits, operating clearance, lubrication and temperature conditions.

Reference Speed and Limiting Speed

SKF specifies the following speed data for 6204-2Z:

Reference Speed: 32,000 r/min
Limiting Speed: 17,000 r/min.

Reference speed and limiting speed are different engineering parameters and should not be used interchangeably.

The actual permissible operating speed in a specific bearing arrangement depends on factors including load, lubrication, operating temperature, fits and surrounding components.

Meaning of 6204-2Z

The complete designation identifies the bearing configuration:

6 - deep groove ball bearing

62 - dimensional series

04 - bore code corresponding to 20 mm

2Z - shields on both sides

The term 6204 ZZ is widely used commercially for a bearing with two metal shields. SKF's own designation for this configuration is 6204-2Z.

For a technical product page, SKF 6204-2Z should therefore be the primary designation, while "6204 ZZ SKF" can appear naturally in the text to support users searching by the common commercial notation.

SKF 6204-2Z vs 6204-2RSH

The two variants share the same principal dimensions of 20x47x14 mm, but their closure systems differ.

6204-2Z: non-contact shields on both sides
6204-2RSH: contact sealing configuration

SKF catalogue data also show different limiting speeds for these configurations: 17,000 r/min for 6204-2Z and 10,000 r/min for 6204-2RSH.

Consequently, the two variants should not be considered technically identical merely because their principal dimensions match.

SKF 6204-2Z vs 6204-2Z/C3

Both versions have the same principal dimensions and 2Z shield configuration. The key difference is radial internal clearance.

6204-2Z: CN radial internal clearance
6204-2Z/C3: C3 radial internal clearance

SKF lists these as separate product configurations.

The C3 suffix should therefore not be added unless the actual bearing specification requires C3 clearance.

Selection and Interchangeability

When selecting a replacement for SKF 6204-2Z, compare:

• complete bearing designation,
• single-row deep groove construction,
• d = 20 mm,
• D = 47 mm,
• B = 14 mm,
• shields on both sides,
• non-contact closure type,
• radial internal clearance,
• dynamic and static load ratings,
• speed requirements,
• shaft and housing fits,
• lubrication and operating conditions.

A bearing described simply as 6204 ZZ 20x47x14 from another manufacturer is not automatically confirmed as a complete technical equivalent. Dimensions alone do not establish full interchangeability.

Technical Specification

Manufacturer / Brand: SKF
Designation: 6204-2Z
Commercial Designation: 6204 ZZ
Product Type: Deep groove ball bearing
Construction: Single row
Dimensional Series: 62
Dimensions: 20x47x14 mm
d - Bore Diameter: 20 mm
D - Outside Diameter: 47 mm
B - Width: 14 mm
Bore Type: Cylindrical
Closure: Shields on both sides
Closure Type: Non-contact
Radial Internal Clearance: CN
Lubrication: Grease
Bearing Material: Bearing steel
Basic Dynamic Load Rating C: 13.5 kN
Basic Static Load Rating C0: 6.55 kN
Fatigue Load Limit Pu: 0.28 kN
Reference Speed: 32,000 r/min
Limiting Speed: 17,000 r/min
Net Mass: 0.107 kg.

FAQ

What are the dimensions of SKF 6204-2Z?

SKF 6204-2Z measures 20x47x14 mm: d = 20 mm bore diameter, D = 47 mm outside diameter and B = 14 mm width.

Is SKF 6204 ZZ the same designation as 6204-2Z?

6204 ZZ is a common commercial notation for the double-shielded configuration. SKF uses 6204-2Z as its product designation.

What does 2Z mean on SKF 6204-2Z?

2Z means that the bearing has shields on both sides. SKF specifies the closure type as non-contact for this reference.

What internal clearance does SKF 6204-2Z have?

The standard SKF 6204-2Z has CN radial internal clearance.

What are the load ratings of SKF 6204-2Z?

SKF specifies C = 13.5 kN, C0 = 6.55 kN and Pu = 0.28 kN.

What is the limiting speed of SKF 6204-2Z?

SKF specifies a limiting speed of 17,000 r/min and a reference speed of 32,000 r/min.

Can SKF 6204-2Z carry axial loads?

Yes. Its deep groove raceway geometry allows it to accommodate axial loads in both directions in addition to radial loads.

Is SKF 6204-2Z/C3 the same bearing?

No. 6204-2Z/C3 has C3 radial internal clearance, while standard 6204-2Z has CN clearance. SKF lists them as separate configurations.

AI Overview

SKF 6204-2Z is a single-row deep groove ball bearing measuring 20x47x14 mm, with non-contact shields on both sides and CN radial internal clearance. SKF specifies a basic dynamic load rating C = 13.5 kN, static load rating C0 = 6.55 kN, fatigue load limit Pu = 0.28 kN and limiting speed of 17,000 r/min.