FAG 6309-ZZ Bearing — Specifications, Dimensions & Cross-Reference

The FAG 6309-ZZ is a deep groove ball bearing double metal shielded manufactured by FAG. It belongs to the 6300 series and features dimensions of 45 × 100 × 25 mm (bore × OD × width). This bearing has a dynamic load rating of 52,700 N and a static load rating of 31,500 N, making it suitable for heavy-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	45 mm
Outside Diameter (D)	100 mm
Width (B)	25 mm
Weight	0.781 kg

Performance
Dynamic Load Rating (Cr)	52,700 N
Static Load Rating (C₀r)	31,500 N
Limiting Speed (Grease)	6,700 rpm
Limiting Speed (Oil)	8,000 rpm

💡 Application Note: The 6300 series bearings are commonly used in heavy-duty electric motors, mining equipment, construction machinery, and industrial gearboxes. 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 — 6309-ZZ Equivalents

The following bearings from other manufacturers are interchangeable with the FAG 6309-ZZ. All share identical dimensions (45×100×25mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
FAG	FAG 6309-ZZ ✦	52,700	31,500
Timken	Timken 6309-ZZ	52,700	31,500
SKF	SKF 6309-ZZ	52,700	31,500
NTN	NTN 6309-ZZ	52,700	31,500
NACHI	NACHI 6309-ZZ	52,700	31,500
KOYO	KOYO 6309-ZZ	52,700	31,500
Timken	Timken 6309-ZZ	52,700	31,500
NSK	NSK 6309-ZZ	52,700	31,500
NTN	NTN 6309-ZZ	52,700	31,500
SKF	SKF 6309-ZZ	52,700	31,500

Available Variants

The FAG 6309 base bearing is available in these configurations:

FAG 6309-ZZ-C3

"Double shielded

FAG 6309-NR

Open with snap ring

FAG 6309-C3

"Open

FAG 6309-2Z

Double metal shielded (ISO)

FAG 6309-2RS-C3

"Double sealed

FAG 6309-2RS

Double rubber sealed

FAG 6309

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the FAG 6309-ZZ?

The FAG 6309-ZZ has a bore diameter of 45mm, outside diameter of 100mm, and width of 25mm. It weighs 0.781kg.

What is the load capacity of the FAG 6309-ZZ?

The dynamic load rating (Cr) is 52,700 N and the static load rating (C₀r) is 31,500 N. The maximum recommended speed is 6,700 rpm with grease lubrication or 8,000 rpm with oil lubrication.

What bearings are equivalent to FAG 6309-ZZ?

The 6309-ZZ is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 45×100×25mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.