NTN 51100-NR Bearing — Specifications, Dimensions & Cross-Reference

The NTN 51100-NR is a thrust ball bearing with snap ring groove manufactured by NTN. 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 -NR suffix indicates an external snap ring groove on the outer ring, allowing easy axial location in housing bores.

Brand Cross-Reference — 51100-NR Equivalents

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

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

Available Variants

The NTN 51100 base bearing is available in these configurations:

NTN 51100-ZZ-C3

Double shielded, C3 clearance

NTN 51100-2RS-C3

Double sealed, C3 clearance

NTN 51100-C3

Open, C3 clearance

NTN 51100-2Z

Double metal shielded (ISO)

NTN 51100-ZZ

Double metal shielded

NTN 51100-2RS

Double rubber sealed

NTN 51100

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NTN 51100-NR?

The NTN 51100-NR 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 NTN 51100-NR?

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 NTN 51100-NR?

The 51100-NR 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.