NACHI 6403-NR Bearing — Specifications, Dimensions & Cross-Reference

The NACHI 6403-NR is a deep groove ball bearing with snap ring groove manufactured by NACHI. It belongs to the 6400 series and features dimensions of 17 × 62 × 17 mm (bore × OD × width). This bearing has a dynamic load rating of 22,700 N and a static load rating of 10,800 N, making it suitable for heavy-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	17 mm
Outside Diameter (D)	62 mm
Width (B)	17 mm
Weight	0.268 kg

Performance
Dynamic Load Rating (Cr)	22,700 N
Static Load Rating (C₀r)	10,800 N
Limiting Speed (Grease)	11,000 rpm
Limiting Speed (Oil)	15,000 rpm

💡 Application Note: The 6400 series bearings are commonly used in heavy machinery, large industrial gearboxes, and high-load conveyor systems. The -NR suffix indicates an external snap ring groove on the outer ring, allowing easy axial location in housing bores.

Brand Cross-Reference — 6403-NR Equivalents

The following bearings from other manufacturers are interchangeable with the NACHI 6403-NR. All share identical dimensions (17×62×17mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NACHI	NACHI 6403-NR ✦	22,700	10,800
Timken	Timken 6403-NR	22,700	10,800
SKF	SKF 6403-NR	22,700	10,800
NTN	NTN 6403-NR	22,700	10,800
KOYO	KOYO 6403-NR	22,700	10,800
FAG	FAG 6403-NR	22,700	10,800
Timken	Timken 6403-NR	22,700	10,800
NSK	NSK 6403-NR	22,700	10,800
NTN	NTN 6403-NR	22,700	10,800
SKF	SKF 6403-NR	22,700	10,800

Available Variants

The NACHI 6403 base bearing is available in these configurations:

NACHI 6403-ZZ-C3

"Double shielded

NACHI 6403-ZZ

Double metal shielded

NACHI 6403-C3

"Open

NACHI 6403-2Z

Double metal shielded (ISO)

NACHI 6403-2RS-C3

"Double sealed

NACHI 6403-2RS

Double rubber sealed

NACHI 6403

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NACHI 6403-NR?

The NACHI 6403-NR has a bore diameter of 17mm, outside diameter of 62mm, and width of 17mm. It weighs 0.268kg.

What is the load capacity of the NACHI 6403-NR?

The dynamic load rating (Cr) is 22,700 N and the static load rating (C₀r) is 10,800 N. The maximum recommended speed is 11,000 rpm with grease lubrication or 15,000 rpm with oil lubrication.

What bearings are equivalent to NACHI 6403-NR?

The 6403-NR is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 17×62×17mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.