KOYO 51100-2RS-C3 Bearing — Specifications, Dimensions & Cross-Reference

The KOYO 51100-2RS-C3 is a thrust ball bearing double rubber sealed manufactured by KOYO. It belongs to the 51100 series and features dimensions of 10 × 24 × 9 mm (bore × OD × width). This bearing has a dynamic load rating of 8,710 N and a static load rating of 5,530 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	10 mm
Outside Diameter (D)	24 mm
Width (B)	9 mm
Weight	0.020 kg

Performance
Dynamic Load Rating (Cr)	8,710 N
Static Load Rating (C₀r)	5,530 N
Limiting Speed (Grease)	11,000 rpm
Limiting Speed (Oil)	14,000 rpm

💡 Application Note: The 51100 series bearings are commonly used in automotive steering mechanisms, machine tool tables, and applications with pure axial loads. The -2RS suffix indicates double rubber contact seals, providing excellent protection against dust, moisture, and contaminants — ideal for harsh operating environments.

Brand Cross-Reference — 51100-2RS-C3 Equivalents

The following bearings from other manufacturers are interchangeable with the KOYO 51100-2RS-C3. All share identical dimensions (10×24×9mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
KOYO	KOYO 51100-2RS-C3 ✦	8,710	5,530
Timken	Timken 51100-2RS-C3	8,710	5,530
SKF	SKF 51100-2RS-C3	8,710	5,530
NACHI	NACHI 51100-2RS-C3	8,710	5,530
Timken	Timken 51100-2RS-C3	8,710	5,530
FAG	FAG 51100-2RS-C3	8,710	5,530
NSK	NSK 51100-2RS-C3	8,710	5,530
NTN	NTN 51100-2RS-C3	8,710	5,530
SKF	SKF 51100-2RS-C3	8,710	5,530

Available Variants

The KOYO 51100 base bearing is available in these configurations:

KOYO 51100-ZZ-C3

"Double shielded

KOYO 51100-ZZ

Double metal shielded

KOYO 51100-NR

Open with snap ring

KOYO 51100-C3

"Open

KOYO 51100-2Z

Double metal shielded (ISO)

KOYO 51100-2RS

Double rubber sealed

KOYO 51100

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the KOYO 51100-2RS-C3?

The KOYO 51100-2RS-C3 has a bore diameter of 10mm, outside diameter of 24mm, and width of 9mm. It weighs 0.020kg.

What is the load capacity of the KOYO 51100-2RS-C3?

The dynamic load rating (Cr) is 8,710 N and the static load rating (C₀r) is 5,530 N. The maximum recommended speed is 11,000 rpm with grease lubrication or 14,000 rpm with oil lubrication.

What bearings are equivalent to KOYO 51100-2RS-C3?

The 51100-2RS-C3 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 10×24×9mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.