KOYO 6211-ZZ Bearing — Specifications, Dimensions & Cross-Reference

The KOYO 6211-ZZ is a deep groove ball bearing double metal shielded manufactured by KOYO. It belongs to the 6200 series and features dimensions of 55 × 100 × 21 mm (bore × OD × width). This bearing has a dynamic load rating of 43,600 N and a static load rating of 28,000 N, making it suitable for heavy-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	55 mm
Outside Diameter (D)	100 mm
Width (B)	21 mm
Weight	0.580 kg

Performance
Dynamic Load Rating (Cr)	43,600 N
Static Load Rating (C₀r)	28,000 N
Limiting Speed (Grease)	6,000 rpm
Limiting Speed (Oil)	7,500 rpm

💡 Application Note: The 6200 series bearings are commonly used in electric motors, agricultural machinery, conveyors, and automotive components. 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 — 6211-ZZ Equivalents

The following bearings from other manufacturers are interchangeable with the KOYO 6211-ZZ. All share identical dimensions (55×100×21mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
KOYO	KOYO 6211-ZZ ✦	43,600	28,000
NACHI	NACHI 6211-ZZ	43,600	28,000
Timken	Timken 6211-ZZ	43,600	28,000
FAG	FAG 6211-ZZ	43,600	28,000
NSK	NSK 6211-ZZ	43,600	28,000
NTN	NTN 6211-ZZ	43,600	28,000
SKF	SKF 6211-ZZ	43,600	28,000

Available Variants

The KOYO 6211 base bearing is available in these configurations:

KOYO 6211-NR

Open with snap ring

KOYO 6211-ZZ-C3

Double shielded, C3 clearance

KOYO 6211-2RS-C3

Double sealed, C3 clearance

KOYO 6211-C3

Open, C3 clearance

KOYO 6211-2Z

Double metal shielded (ISO)

KOYO 6211-2RS

Double rubber sealed

KOYO 6211

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the KOYO 6211-ZZ?

The KOYO 6211-ZZ has a bore diameter of 55mm, outside diameter of 100mm, and width of 21mm. It weighs 0.580kg.

What is the load capacity of the KOYO 6211-ZZ?

The dynamic load rating (Cr) is 43,600 N and the static load rating (C₀r) is 28,000 N. The maximum recommended speed is 6,000 rpm with grease lubrication or 7,500 rpm with oil lubrication.

What bearings are equivalent to KOYO 6211-ZZ?

The 6211-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 55×100×21mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.