NACHI 6004-ZZ Bearing — Specifications, Dimensions & Cross-Reference

The NACHI 6004-ZZ is a deep groove ball bearing double metal shielded manufactured by NACHI. It belongs to the 6000 series and features dimensions of 20 × 42 × 12 mm (bore × OD × width). This bearing has a dynamic load rating of 9,380 N and a static load rating of 5,000 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	20 mm
Outside Diameter (D)	42 mm
Width (B)	12 mm
Weight	0.067 kg

Performance
Dynamic Load Rating (Cr)	9,380 N
Static Load Rating (C₀r)	5,000 N
Limiting Speed (Grease)	17,000 rpm
Limiting Speed (Oil)	21,000 rpm

💡 Application Note: The 6000 series bearings are commonly used in electric motors, power tools, small pumps, and household appliances. The -ZZ suffix indicates double metal shields, offering good protection while maintaining lower friction than rubber seals — suitable for higher speed applications.

Brand Cross-Reference — 6004-ZZ Equivalents

The following bearings from other manufacturers are interchangeable with the NACHI 6004-ZZ. All share identical dimensions (20×42×12mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NACHI	NACHI 6004-ZZ ✦	9,380	5,000
KOYO	KOYO 6004-ZZ	9,380	5,000
Timken	Timken 6004-ZZ	9,380	5,000
FAG	FAG 6004-ZZ	9,380	5,000
NTN	NTN 6004-ZZ	9,380	5,000
NSK	NSK 6004-ZZ	9,380	5,000
SKF	SKF 6004-ZZ	9,380	5,000

Available Variants

The NACHI 6004 base bearing is available in these configurations:

NACHI 6004-NR

Open with snap ring

NACHI 6004-ZZ-C3

Double shielded, C3 clearance

NACHI 6004-2RS-C3

Double sealed, C3 clearance

NACHI 6004-C3

Open, C3 clearance

NACHI 6004-2Z

Double metal shielded (ISO)

NACHI 6004-2RS

Double rubber sealed

NACHI 6004

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NACHI 6004-ZZ?

The NACHI 6004-ZZ has a bore diameter of 20mm, outside diameter of 42mm, and width of 12mm. It weighs 0.067kg.

What is the load capacity of the NACHI 6004-ZZ?

The dynamic load rating (Cr) is 9,380 N and the static load rating (C₀r) is 5,000 N. The maximum recommended speed is 17,000 rpm with grease lubrication or 21,000 rpm with oil lubrication.

What bearings are equivalent to NACHI 6004-ZZ?

The 6004-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 20×42×12mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.