NTN 51104-C3 Bearing — Specifications, Dimensions & Cross-Reference

The NTN 51104-C3 is a thrust ball bearing with C3 clearance manufactured by NTN. It belongs to the 51100 series and features dimensions of 20 × 35 × 10 mm (bore × OD × width). This bearing has a dynamic load rating of 12,500 N and a static load rating of 9,300 N, making it suitable for medium-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	20 mm
Outside Diameter (D)	35 mm
Width (B)	10 mm
Weight	0.038 kg

Performance
Dynamic Load Rating (Cr)	12,500 N
Static Load Rating (C₀r)	9,300 N
Limiting Speed (Grease)	7,500 rpm
Limiting Speed (Oil)	10,000 rpm

💡 Application Note: The 51100 series bearings are commonly used in automotive steering mechanisms, machine tool tables, and applications with pure axial loads. The -C3 suffix indicates greater-than-normal radial internal clearance, recommended for applications with temperature differentials or tight shaft/housing fits.

Brand Cross-Reference — 51104-C3 Equivalents

The following bearings from other manufacturers are interchangeable with the NTN 51104-C3. All share identical dimensions (20×35×10mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NTN	NTN 51104-C3 ✦	12,500	9,300
Timken	Timken 51104-C3	12,500	9,300
SKF	SKF 51104-C3	12,500	9,300
NACHI	NACHI 51104-C3	12,500	9,300
KOYO	KOYO 51104-C3	12,500	9,300
FAG	FAG 51104-C3	12,500	9,300
Timken	Timken 51104-C3	12,500	9,300
NSK	NSK 51104-C3	12,500	9,300
SKF	SKF 51104-C3	12,500	9,300

Available Variants

The NTN 51104 base bearing is available in these configurations:

NTN 51104-NR

Open with snap ring

NTN 51104-ZZ-C3

Double shielded, C3 clearance

NTN 51104-2RS-C3

Double sealed, C3 clearance

NTN 51104-2Z

Double metal shielded (ISO)

NTN 51104-ZZ

Double metal shielded

NTN 51104-2RS

Double rubber sealed

NTN 51104

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NTN 51104-C3?

The NTN 51104-C3 has a bore diameter of 20mm, outside diameter of 35mm, and width of 10mm. It weighs 0.038kg.

What is the load capacity of the NTN 51104-C3?

The dynamic load rating (Cr) is 12,500 N and the static load rating (C₀r) is 9,300 N. The maximum recommended speed is 7,500 rpm with grease lubrication or 10,000 rpm with oil lubrication.

What bearings are equivalent to NTN 51104-C3?

The 51104-C3 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 20×35×10mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.