KOYO 6806-ZZ Bearing — Specifications, Dimensions & Cross-Reference

The KOYO 6806-ZZ is a deep groove ball bearing double metal shielded manufactured by KOYO. It belongs to the 6800 series and features dimensions of 30 × 42 × 7 mm (bore × OD × width). This bearing has a dynamic load rating of 3,050 N and a static load rating of 2,240 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	30 mm
Outside Diameter (D)	42 mm
Width (B)	7 mm
Weight	0.022 kg

Performance
Dynamic Load Rating (Cr)	3,050 N
Static Load Rating (C₀r)	2,240 N
Limiting Speed (Grease)	15,000 rpm
Limiting Speed (Oil)	21,000 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 — 6806-ZZ Equivalents

The following bearings from other manufacturers are interchangeable with the KOYO 6806-ZZ. All share identical dimensions (30×42×7mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
KOYO	KOYO 6806-ZZ ✦	3,050	2,240
Timken	Timken 6806-ZZ	3,050	2,240
SKF	SKF 6806-ZZ	3,050	2,240
NTN	NTN 6806-ZZ	3,050	2,240
NACHI	NACHI 6806-ZZ	3,050	2,240
FAG	FAG 6806-ZZ	3,050	2,240
Timken	Timken 6806-ZZ	3,050	2,240
NSK	NSK 6806-ZZ	3,050	2,240
NTN	NTN 6806-ZZ	3,050	2,240
SKF	SKF 6806-ZZ	3,050	2,240

Available Variants

The KOYO 6806 base bearing is available in these configurations:

KOYO 6806-ZZ-C3

"Double shielded

KOYO 6806-NR

Open with snap ring

KOYO 6806-C3

"Open

KOYO 6806-2Z

Double metal shielded (ISO)

KOYO 6806-2RS-C3

"Double sealed

KOYO 6806-2RS

Double rubber sealed

KOYO 6806

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the KOYO 6806-ZZ?

The KOYO 6806-ZZ has a bore diameter of 30mm, outside diameter of 42mm, and width of 7mm. It weighs 0.022kg.

What is the load capacity of the KOYO 6806-ZZ?

The dynamic load rating (Cr) is 3,050 N and the static load rating (C₀r) is 2,240 N. The maximum recommended speed is 15,000 rpm with grease lubrication or 21,000 rpm with oil lubrication.

What bearings are equivalent to KOYO 6806-ZZ?

The 6806-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 30×42×7mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.