SKF 6191-ZZ Bearing — Specifications, Dimensions & Cross-Reference

The SKF 6191-ZZ is a deep groove ball bearing double metal shielded manufactured by SKF. It belongs to the 619 series and features dimensions of 12 × 28 × 8 mm (bore × OD × width). This bearing has a dynamic load rating of 5,070 N and a static load rating of 2,240 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	12 mm
Outside Diameter (D)	28 mm
Width (B)	8 mm
Weight	0.021 kg

Performance
Dynamic Load Rating (Cr)	5,070 N
Static Load Rating (C₀r)	2,240 N
Limiting Speed (Grease)	26,000 rpm
Limiting Speed (Oil)	30,000 rpm

💡 Application Note: The 619 series bearings are commonly used in thin-section applications, robotics, aerospace mechanisms, and space-constrained designs. 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 — 6191-ZZ Equivalents

The following bearings from other manufacturers are interchangeable with the SKF 6191-ZZ. All share identical dimensions (12×28×8mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
SKF	SKF 6191-ZZ ✦	5,070	2,240
Timken	Timken 6191-ZZ	5,070	2,240
SKF	SKF 6191-ZZ	5,070	2,240
NTN	NTN 6191-ZZ	5,070	2,240
NACHI	NACHI 6191-ZZ	5,070	2,240
KOYO	KOYO 6191-ZZ	5,070	2,240
Timken	Timken 6191-ZZ	5,070	2,240
FAG	FAG 6191-ZZ	5,070	2,240
NSK	NSK 6191-ZZ	5,070	2,240
NTN	NTN 6191-ZZ	5,070	2,240

Available Variants

The SKF 6191 base bearing is available in these configurations:

SKF 6191-ZZ-C3

"Double shielded

SKF 6191-ZZ

Double metal shielded

SKF 6191-NR

Open with snap ring

SKF 6191-C3

"Open

SKF 6191-2Z

Double metal shielded (ISO)

SKF 6191-2RS-C3

"Double sealed

SKF 6191-2RS

Double rubber sealed

SKF 6191

Open (no seal/shield)

SKF 6191-NR

Open with snap ring

SKF 6191-ZZ-C3

Double shielded, C3 clearance

SKF 6191-2RS-C3

Double sealed, C3 clearance

SKF 6191-C3

Open, C3 clearance

SKF 6191-2Z

Double metal shielded (ISO)

SKF 6191-2RS

Double rubber sealed

SKF 6191

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the SKF 6191-ZZ?

The SKF 6191-ZZ has a bore diameter of 12mm, outside diameter of 28mm, and width of 8mm. It weighs 0.021kg.

What is the load capacity of the SKF 6191-ZZ?

The dynamic load rating (Cr) is 5,070 N and the static load rating (C₀r) is 2,240 N. The maximum recommended speed is 26,000 rpm with grease lubrication or 30,000 rpm with oil lubrication.

What bearings are equivalent to SKF 6191-ZZ?

The 6191-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 12×28×8mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.