NSK 6901-C3 Bearing — Specifications, Dimensions & Cross-Reference

The NSK 6901-C3 is a deep groove ball bearing with C3 clearance manufactured by NSK. It belongs to the 6900 series and features dimensions of 12 × 24 × 6 mm (bore × OD × width). This bearing has a dynamic load rating of 2,340 N and a static load rating of 1,370 N, making it suitable for light-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	12 mm
Outside Diameter (D)	24 mm
Width (B)	6 mm
Weight	0.010 kg

Performance
Dynamic Load Rating (Cr)	2,340 N
Static Load Rating (C₀r)	1,370 N
Limiting Speed (Grease)	26,000 rpm
Limiting Speed (Oil)	34,000 rpm

💡 Application Note: The 6900 series bearings are commonly used in office equipment, small electric motors, and light industrial applications. The -C3 suffix indicates greater-than-normal radial internal clearance, recommended for applications with temperature differentials or tight shaft/housing fits.

Brand Cross-Reference — 6901-C3 Equivalents

The following bearings from other manufacturers are interchangeable with the NSK 6901-C3. All share identical dimensions (12×24×6mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NSK	NSK 6901-C3 ✦	2,340	1,370
Timken	Timken 6901-C3	2,340	1,370
SKF	SKF 6901-C3	2,340	1,370
NTN	NTN 6901-C3	2,340	1,370
NACHI	NACHI 6901-C3	2,340	1,370
KOYO	KOYO 6901-C3	2,340	1,370
FAG	FAG 6901-C3	2,340	1,370
Timken	Timken 6901-C3	2,340	1,370
NTN	NTN 6901-C3	2,340	1,370
SKF	SKF 6901-C3	2,340	1,370

Available Variants

The NSK 6901 base bearing is available in these configurations:

NSK 6901-NR

Open with snap ring

NSK 6901-ZZ-C3

Double shielded, C3 clearance

NSK 6901-2RS-C3

Double sealed, C3 clearance

NSK 6901-2Z

Double metal shielded (ISO)

NSK 6901-ZZ

Double metal shielded

NSK 6901-2RS

Double rubber sealed

NSK 6901

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NSK 6901-C3?

The NSK 6901-C3 has a bore diameter of 12mm, outside diameter of 24mm, and width of 6mm. It weighs 0.010kg.

What is the load capacity of the NSK 6901-C3?

The dynamic load rating (Cr) is 2,340 N and the static load rating (C₀r) is 1,370 N. The maximum recommended speed is 26,000 rpm with grease lubrication or 34,000 rpm with oil lubrication.

What bearings are equivalent to NSK 6901-C3?

The 6901-C3 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 12×24×6mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.