DAC3055-2RKCS48-FG KOYO 30x55x23

DAC3055-2RKCS48-FG KOYO 30x55x23

DAC3055-2RKCS48-FG KOYO is a special double-row angular contact ball bearing with nominal dimensions of 30x55x23 mm. This specific version features a double-row ball construction and seals on both sides. The bearing is used, among other applications, in air-conditioning compressors. The complete DAC3055-2RKCS48-FG designation should be verified when selecting a replacement because other DAC3055 variants may have different widths and designs.

Technical data

For this specific DAC3055-2RKCS48-FG version, available bearing references specify a 30 mm bore, 55 mm outside diameter and approximately 23 mm width, together with a double-row construction and sealing on both sides.

DAC3055-2RKCS48-FG dimensions

The nominal bearing dimensions are:

30x55x23 mm

where:

• d 30 mm - bore diameter
• D 55 mm - outside diameter
• B 23 mm - nominal bearing width

A precise width of 23.017 mm is also reported for this specific version.

The dimensions alone should not be used as the only criterion for bearing identification. Other DAC3055 variants exist with different widths and construction details.

What does DAC3055-2RKCS48-FG mean?

The complete bearing designation is:

DAC3055-2RKCS48-FG

DAC3055

DAC3055 is the basic designation associated with this family of special bearings. For the analyzed version, the 30x55x23 mm dimensions and double-row angular contact ball bearing construction are confirmed.

The basic DAC3055 designation alone does not fully identify the bearing because different DAC3055 versions can have different widths and design features.

2RKCS48

2RKCS48 is part of the specific KOYO bearing designation. For DAC3055-2RKCS48-FG, sealing on both sides is confirmed, with available technical references describing the bearing as having double-sided contact seals.

The individual characters within 2RKCS48 should not be assigned separate technical meanings without the appropriate KOYO/JTEKT designation documentation for this bearing family.

FG

FG is an integral part of the complete DAC3055-2RKCS48-FG designation.

Without an authoritative KOYO/JTEKT suffix table specifically covering this bearing series, no additional technical meaning should be assigned to FG.

For replacement purposes, DAC3055-2RKCS48-FG should therefore be treated as the complete designation of this specific bearing version.

Double-row angular contact design

DAC3055-2RKCS48-FG is a double-row angular contact ball bearing. Its construction incorporates two rows of balls and appropriately designed raceways.

Angular contact ball bearing geometry allows radial and axial loads to be accommodated within the design limits of the bearing. Actual permissible loads depend on the specific bearing design and operating conditions.

For DAC3055-2RKCS48-FG, the following construction features are reported:

• double-row construction
• ball rolling elements
• sealing on both sides
• contact seals
• polyamide cage

Dynamic load rating, static load rating, limiting speed, internal clearance and other numerical operating parameters should not be assigned from similar DAC3055 bearings unless they are confirmed for the exact DAC3055-2RKCS48-FG version.

Sealing on both sides

The DAC3055-2RKCS48-FG is sealed on both sides. Available references for this exact version describe the seals as double-sided contact seals.

The seals help limit the ingress of contaminants into the bearing and retain lubricant within the bearing assembly.

The 2RKCS48 designation should not be considered equivalent to suffixes such as 2RS, 2RSH or 2RS1 used by other bearing manufacturers. Suffix terminology is manufacturer- and product-family-specific.

DAC3055-2RKCS48-FG vs other DAC3055 variants

The basic designation DAC3055 alone is not sufficient to identify this bearing.

Different DAC3055 variants are available with different widths and design details. Consequently, two bearings belonging to the DAC3055 family are not automatically interchangeable.

For this product, the key identification is:

DAC3055-2RKCS48-FG KOYO

with dimensions:

30x55x23 mm

When replacing the bearing, compare the complete designation rather than relying only on DAC3055 or the 30x55 mm bore and outside diameter combination.

Application

The exact DAC3055-2RKCS48-FG KOYO designation is referenced as a special bearing used in air-conditioning compressors.

This does not mean that it is automatically compatible with every compressor using a 30x55x23 mm bearing.

For a specific compressor or vehicle application, verify:

• complete designation of the removed bearing
• dimensions
• bearing design
• sealing arrangement
• confirmed compressor or manufacturer cross-reference

A matching size alone does not confirm application compatibility.

Alternative designations and reference numbers

Natural variations of the product designation include:

• DAC3055-2RKCS48-FG KOYO
• KOYO DAC3055-2RKCS48-FG
• DAC 3055 2RKCS48 FG KOYO
• DAC3055 2RKCS48 FG KOYO
• DAC3055-2RKCS48-FG 30x55x23
• KOYO DAC3055 30x55x23

Available industry cross-reference sources also associate the following designations with this bearing:

• 30BD40T12DDUCG21 NSK
• 30BG05S5G-2DS NACHI
• PC30550023CS PFI

These should be treated as cross-reference numbers rather than automatic confirmation of interchangeability. The exact construction and compatibility with the intended compressor should be verified before installation.

How to select a replacement for DAC3055-2RKCS48-FG

Before ordering a replacement, verify:

• full designation DAC3055-2RKCS48-FG
• manufacturer
• 30 mm bore diameter
• 55 mm outside diameter
• 23 mm width
• double-row construction
• sealing arrangement
• designation on the removed bearing
• requirements of the specific assembly

Identical 30x55x23 mm dimensions do not automatically guarantee full interchangeability.

For special-purpose bearings, the complete designation and construction are particularly important when identifying a replacement.

Installation

Keep the bearing and surrounding components clean during installation and protect the raceways, rolling elements and seals against damage.

When press-fitting the bearing onto a shaft, installation force should be applied to the inner ring. When pressing the bearing into a housing, force should be applied to the outer ring.

Installation force should not be transmitted through the balls and raceways. The bearing should not be struck directly.

The shaft, housing and mating surfaces should also be checked for condition and correct fit before installation.

FAQ

What are the dimensions of DAC3055-2RKCS48-FG KOYO?

The nominal dimensions are 30x55x23 mm: 30 mm bore diameter, 55 mm outside diameter and approximately 23 mm width. A precise width of 23.017 mm is also reported for this version.

What type of bearing is DAC3055-2RKCS48-FG?

It is a double-row angular contact ball bearing.

Is DAC3055-2RKCS48-FG sealed on both sides?

Yes. This specific version is reported with seals on both sides. Available references describe them as contact seals.

What is DAC3055-2RKCS48-FG used for?

This exact bearing designation is referenced for use in air-conditioning compressors. Compatibility with a particular compressor should be verified separately.

Are all DAC3055 bearings 30x55x23 mm?

No. DAC3055 is a basic family designation and different versions can have different widths and construction details. The complete suffix and dimensions should always be checked.

Is NSK 30BD40T12DDUCG21 a replacement for DAC3055-2RKCS48-FG?

30BD40T12DDUCG21 NSK is listed in industry cross-reference information for this bearing. Compatibility with the specific compressor and application should still be confirmed before installation.

Is NACHI 30BG05S5G-2DS an equivalent bearing?

30BG05S5G-2DS NACHI is also listed as a cross-reference for this bearing. It should not be treated as automatically interchangeable without checking the complete technical specification and application requirements.

Can I select a replacement only by the 30x55x23 mm dimensions?

No. The complete designation, bearing construction, sealing arrangement and requirements of the specific assembly should also be verified.

DAC3055-2RKCS48-FG KOYO - key information

DAC3055-2RKCS48-FG KOYO is a double-row angular contact ball bearing with nominal dimensions of 30x55x23 mm and sealing on both sides. This special bearing is used, among other applications, in air-conditioning compressors. Replacement selection should be based on the complete DAC3055-2RKCS48-FG designation because other DAC3055 variants may differ in dimensions and construction.