NACHI 6814-ZZ Bearing — Specifications, Dimensions & Cross-Reference

The NACHI 6814-ZZ is a deep groove ball bearing double metal shielded manufactured by NACHI. It belongs to the 6800 series and features dimensions of 70 × 90 × 10 mm (bore × OD × width). This bearing has a dynamic load rating of 6,630 N and a static load rating of 6,100 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	70 mm
Outside Diameter (D)	90 mm
Width (B)	10 mm
Weight	0.093 kg

Performance
Dynamic Load Rating (Cr)	6,630 N
Static Load Rating (C₀r)	6,100 N
Limiting Speed (Grease)	7,000 rpm
Limiting Speed (Oil)	9,500 rpm

💡 Application Note: The 6800 series bearings are commonly used in precision instruments, medical devices, dental handpieces, and miniature mechanisms. 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 — 6814-ZZ Equivalents

The following bearings from other manufacturers are interchangeable with the NACHI 6814-ZZ. All share identical dimensions (70×90×10mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NACHI	NACHI 6814-ZZ ✦	6,630	6,100
Timken	Timken 6814-ZZ	6,630	6,100
SKF	SKF 6814-ZZ	6,630	6,100
NTN	NTN 6814-ZZ	6,630	6,100
KOYO	KOYO 6814-ZZ	6,630	6,100
FAG	FAG 6814-ZZ	6,630	6,100
Timken	Timken 6814-ZZ	6,630	6,100
NSK	NSK 6814-ZZ	6,630	6,100
SKF	SKF 6814-ZZ	6,630	6,100
NTN	NTN 6814-ZZ	6,630	6,100

Available Variants

The NACHI 6814 base bearing is available in these configurations:

NACHI 6814-ZZ-C3

"Double shielded

NACHI 6814-NR

Open with snap ring

NACHI 6814-C3

"Open

NACHI 6814-2Z

Double metal shielded (ISO)

NACHI 6814-2RS-C3

"Double sealed

NACHI 6814-2RS

Double rubber sealed

NACHI 6814

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NACHI 6814-ZZ?

The NACHI 6814-ZZ has a bore diameter of 70mm, outside diameter of 90mm, and width of 10mm. It weighs 0.093kg.

What is the load capacity of the NACHI 6814-ZZ?

The dynamic load rating (Cr) is 6,630 N and the static load rating (C₀r) is 6,100 N. The maximum recommended speed is 7,000 rpm with grease lubrication or 9,500 rpm with oil lubrication.

What bearings are equivalent to NACHI 6814-ZZ?

The 6814-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 70×90×10mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.