NACHI 6902-NR Bearing — Specifications, Dimensions & Cross-Reference

The NACHI 6902-NR is a deep groove ball bearing with snap ring groove manufactured by NACHI. It belongs to the 6900 series and features dimensions of 15 × 28 × 7 mm (bore × OD × width). This bearing has a dynamic load rating of 3,450 N and a static load rating of 1,960 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	15 mm
Outside Diameter (D)	28 mm
Width (B)	7 mm
Weight	0.014 kg

Performance
Dynamic Load Rating (Cr)	3,450 N
Static Load Rating (C₀r)	1,960 N
Limiting Speed (Grease)	22,000 rpm
Limiting Speed (Oil)	30,000 rpm

💡 Application Note: The 6900 series bearings are commonly used in office equipment, small electric motors, and light industrial applications. The -NR suffix indicates an external snap ring groove on the outer ring, allowing easy axial location in housing bores.

Brand Cross-Reference — 6902-NR Equivalents

The following bearings from other manufacturers are interchangeable with the NACHI 6902-NR. All share identical dimensions (15×28×7mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NACHI	NACHI 6902-NR ✦	3,450	1,960
NTN	NTN 6902-NR	3,450	1,960
KOYO	KOYO 6902-NR	3,450	1,960
FAG	FAG 6902-NR	3,450	1,960
Timken	Timken 6902-NR	3,450	1,960
NSK	NSK 6902-NR	3,450	1,960
NTN	NTN 6902-NR	3,450	1,960
SKF	SKF 6902-NR	3,450	1,960

Available Variants

The NACHI 6902 base bearing is available in these configurations:

NACHI 6902-ZZ-C3

"Double shielded

NACHI 6902-ZZ

Double metal shielded

NACHI 6902-C3

"Open

NACHI 6902-2Z

Double metal shielded (ISO)

NACHI 6902-2RS-C3

"Double sealed

NACHI 6902-2RS

Double rubber sealed

NACHI 6902

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NACHI 6902-NR?

The NACHI 6902-NR has a bore diameter of 15mm, outside diameter of 28mm, and width of 7mm. It weighs 0.014kg.

What is the load capacity of the NACHI 6902-NR?

The dynamic load rating (Cr) is 3,450 N and the static load rating (C₀r) is 1,960 N. The maximum recommended speed is 22,000 rpm with grease lubrication or 30,000 rpm with oil lubrication.

What bearings are equivalent to NACHI 6902-NR?

The 6902-NR is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 15×28×7mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.