NACHI 6218-NR Bearing — Specifications, Dimensions & Cross-Reference

The NACHI 6218-NR is a deep groove ball bearing with snap ring groove manufactured by NACHI. It belongs to the 6200 series and features dimensions of 90 × 160 × 30 mm (bore × OD × width). This bearing has a dynamic load rating of 95,600 N and a static load rating of 73,500 N, making it suitable for heavy-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	90 mm
Outside Diameter (D)	160 mm
Width (B)	30 mm
Weight	1.800 kg

Performance
Dynamic Load Rating (Cr)	95,600 N
Static Load Rating (C₀r)	73,500 N
Limiting Speed (Grease)	3,400 rpm
Limiting Speed (Oil)	4,300 rpm

💡 Application Note: The 6200 series bearings are commonly used in electric motors, agricultural machinery, conveyors, and automotive components. The -NR suffix indicates an external snap ring groove on the outer ring, allowing easy axial location in housing bores.

Brand Cross-Reference — 6218-NR Equivalents

The following bearings from other manufacturers are interchangeable with the NACHI 6218-NR. All share identical dimensions (90×160×30mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NACHI	NACHI 6218-NR ✦	95,600	73,500
KOYO	KOYO 6218-NR	95,600	73,500
Timken	Timken 6218-NR	95,600	73,500
FAG	FAG 6218-NR	95,600	73,500
NSK	NSK 6218-NR	95,600	73,500
NTN	NTN 6218-NR	95,600	73,500
SKF	SKF 6218-NR	95,600	73,500

Available Variants

The NACHI 6218 base bearing is available in these configurations:

NACHI 6218-ZZ-C3

Double shielded, C3 clearance

NACHI 6218-2RS-C3

Double sealed, C3 clearance

NACHI 6218-C3

Open, C3 clearance

NACHI 6218-2Z

Double metal shielded (ISO)

NACHI 6218-ZZ

Double metal shielded

NACHI 6218-2RS

Double rubber sealed

NACHI 6218

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NACHI 6218-NR?

The NACHI 6218-NR has a bore diameter of 90mm, outside diameter of 160mm, and width of 30mm. It weighs 1.800kg.

What is the load capacity of the NACHI 6218-NR?

The dynamic load rating (Cr) is 95,600 N and the static load rating (C₀r) is 73,500 N. The maximum recommended speed is 3,400 rpm with grease lubrication or 4,300 rpm with oil lubrication.

What bearings are equivalent to NACHI 6218-NR?

The 6218-NR is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 90×160×30mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.