NSK 51108-NR Bearing — Specifications, Dimensions & Cross-Reference

The NSK 51108-NR is a thrust ball bearing with snap ring groove manufactured by NSK. It belongs to the 51100 series and features dimensions of 40 × 60 × 13 mm (bore × OD × width). This bearing has a dynamic load rating of 26,700 N and a static load rating of 24,500 N, making it suitable for heavy-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	40 mm
Outside Diameter (D)	60 mm
Width (B)	13 mm
Weight	0.110 kg

Performance
Dynamic Load Rating (Cr)	26,700 N
Static Load Rating (C₀r)	24,500 N
Limiting Speed (Grease)	4,500 rpm
Limiting Speed (Oil)	6,000 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 — 51108-NR Equivalents

The following bearings from other manufacturers are interchangeable with the NSK 51108-NR. All share identical dimensions (40×60×13mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NSK	NSK 51108-NR ✦	26,700	24,500
NTN	NTN 51108-NR	26,700	24,500
NACHI	NACHI 51108-NR	26,700	24,500
KOYO	KOYO 51108-NR	26,700	24,500
Timken	Timken 51108-NR	26,700	24,500
FAG	FAG 51108-NR	26,700	24,500
NTN	NTN 51108-NR	26,700	24,500
SKF	SKF 51108-NR	26,700	24,500

Available Variants

The NSK 51108 base bearing is available in these configurations:

NSK 51108-ZZ-C3

Double shielded, C3 clearance

NSK 51108-2RS-C3

Double sealed, C3 clearance

NSK 51108-C3

Open, C3 clearance

NSK 51108-2Z

Double metal shielded (ISO)

NSK 51108-ZZ

Double metal shielded

NSK 51108-2RS

Double rubber sealed

NSK 51108

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NSK 51108-NR?

The NSK 51108-NR has a bore diameter of 40mm, outside diameter of 60mm, and width of 13mm. It weighs 0.110kg.

What is the load capacity of the NSK 51108-NR?

The dynamic load rating (Cr) is 26,700 N and the static load rating (C₀r) is 24,500 N. The maximum recommended speed is 4,500 rpm with grease lubrication or 6,000 rpm with oil lubrication.

What bearings are equivalent to NSK 51108-NR?

The 51108-NR is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 40×60×13mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.