SKF 6903 Bearing — Specifications, Dimensions & Cross-Reference

The SKF 6903 is a deep groove ball bearing manufactured by SKF. It belongs to the 6900 series and features dimensions of 17 × 30 × 7 mm (bore × OD × width). This bearing has a dynamic load rating of 3,450 N and a static load rating of 2,070 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	17 mm
Outside Diameter (D)	30 mm
Width (B)	7 mm
Weight	0.016 kg

Performance
Dynamic Load Rating (Cr)	3,450 N
Static Load Rating (C₀r)	2,070 N
Limiting Speed (Grease)	20,000 rpm
Limiting Speed (Oil)	28,000 rpm

💡 Application Note: The 6900 series bearings are commonly used in office equipment, small electric motors, and light industrial applications.

Brand Cross-Reference — 6903 Equivalents

The following bearings from other manufacturers are interchangeable with the SKF 6903. All share identical dimensions (17×30×7mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
SKF	SKF 6903 ✦	3,450	2,070
NTN	NTN 6903	3,450	2,070
NACHI	NACHI 6903	3,450	2,070
KOYO	KOYO 6903	3,450	2,070
FAG	FAG 6903	3,450	2,070
Timken	Timken 6903	3,450	2,070
NSK	NSK 6903	3,450	2,070
NTN	NTN 6903	3,450	2,070

Available Variants

The SKF 6903 base bearing is available in these configurations:

SKF 6903-NR

Open with snap ring

SKF 6903-ZZ-C3

Double shielded, C3 clearance

SKF 6903-2RS-C3

Double sealed, C3 clearance

SKF 6903-C3

Open, C3 clearance

SKF 6903-2Z

Double metal shielded (ISO)

SKF 6903-ZZ

Double metal shielded

SKF 6903-2RS

Double rubber sealed

Frequently Asked Questions

What are the dimensions of the SKF 6903?

The SKF 6903 has a bore diameter of 17mm, outside diameter of 30mm, and width of 7mm. It weighs 0.016kg.

What is the load capacity of the SKF 6903?

The dynamic load rating (Cr) is 3,450 N and the static load rating (C₀r) is 2,070 N. The maximum recommended speed is 20,000 rpm with grease lubrication or 28,000 rpm with oil lubrication.

What bearings are equivalent to SKF 6903?

The 6903 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 17×30×7mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.