KOYO 1204-2RS Bearing — Specifications, Dimensions & Cross-Reference

The KOYO 1204-2RS is a self-aligning ball bearing double rubber sealed manufactured by KOYO. It belongs to the 1200 series and features dimensions of 20 × 47 × 14 mm (bore × OD × width). This bearing has a dynamic load rating of 9,360 N and a static load rating of 3,100 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	20 mm
Outside Diameter (D)	47 mm
Width (B)	14 mm
Weight	0.094 kg

Performance
Dynamic Load Rating (Cr)	9,360 N
Static Load Rating (C₀r)	3,100 N
Limiting Speed (Grease)	13,000 rpm
Limiting Speed (Oil)	17,000 rpm

💡 Application Note: The 1200 series bearings are commonly used in conveyor rollers, textile machinery, and applications with shaft misalignment. The -2RS suffix indicates double rubber contact seals, providing excellent protection against dust, moisture, and contaminants — ideal for harsh operating environments.

Brand Cross-Reference — 1204-2RS Equivalents

The following bearings from other manufacturers are interchangeable with the KOYO 1204-2RS. All share identical dimensions (20×47×14mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
KOYO	KOYO 1204-2RS ✦	9,360	3,100
Timken	Timken 1204-2RS	9,360	3,100
SKF	SKF 1204-2RS	9,360	3,100
NACHI	NACHI 1204-2RS	9,360	3,100
Timken	Timken 1204-2RS	9,360	3,100
FAG	FAG 1204-2RS	9,360	3,100
NSK	NSK 1204-2RS	9,360	3,100
NTN	NTN 1204-2RS	9,360	3,100
SKF	SKF 1204-2RS	9,360	3,100

Available Variants

The KOYO 1204 base bearing is available in these configurations:

KOYO 1204-ZZ-C3

"Double shielded

KOYO 1204-ZZ

Double metal shielded

KOYO 1204-NR

Open with snap ring

KOYO 1204-C3

"Open

KOYO 1204-2Z

Double metal shielded (ISO)

KOYO 1204-2RS-C3

"Double sealed

KOYO 1204

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the KOYO 1204-2RS?

The KOYO 1204-2RS has a bore diameter of 20mm, outside diameter of 47mm, and width of 14mm. It weighs 0.094kg.

What is the load capacity of the KOYO 1204-2RS?

The dynamic load rating (Cr) is 9,360 N and the static load rating (C₀r) is 3,100 N. The maximum recommended speed is 13,000 rpm with grease lubrication or 17,000 rpm with oil lubrication.

What bearings are equivalent to KOYO 1204-2RS?

The 1204-2RS is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 20×47×14mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.