NSK 6307-2RS-C3 Bearing — Specifications, Dimensions & Cross-Reference

The NSK 6307-2RS-C3 is a deep groove ball bearing double rubber sealed manufactured by NSK. It belongs to the 6300 series and features dimensions of 35 × 80 × 21 mm (bore × OD × width). This bearing has a dynamic load rating of 33,200 N and a static load rating of 19,000 N, making it suitable for heavy-duty applications.

Technical Specifications

Dimensions
Bore Diameter (d)	35 mm
Outside Diameter (D)	80 mm
Width (B)	21 mm
Weight	0.413 kg

Performance
Dynamic Load Rating (Cr)	33,200 N
Static Load Rating (C₀r)	19,000 N
Limiting Speed (Grease)	8,500 rpm
Limiting Speed (Oil)	10,000 rpm

💡 Application Note: The 6300 series bearings are commonly used in heavy-duty electric motors, mining equipment, construction machinery, and industrial gearboxes. The -2RS suffix indicates double rubber contact seals, providing excellent protection against dust, moisture, and contaminants — ideal for harsh operating environments.

Brand Cross-Reference — 6307-2RS-C3 Equivalents

The following bearings from other manufacturers are interchangeable with the NSK 6307-2RS-C3. All share identical dimensions (35×80×21mm) and comparable load ratings:

Brand	Part Number	Dynamic Load (N)	Static Load (N)
NSK	NSK 6307-2RS-C3 ✦	33,200	19,000
Timken	Timken 6307-2RS-C3	33,200	19,000
SKF	SKF 6307-2RS-C3	33,200	19,000
NTN	NTN 6307-2RS-C3	33,200	19,000
NACHI	NACHI 6307-2RS-C3	33,200	19,000
KOYO	KOYO 6307-2RS-C3	33,200	19,000
FAG	FAG 6307-2RS-C3	33,200	19,000
Timken	Timken 6307-2RS-C3	33,200	19,000
NTN	NTN 6307-2RS-C3	33,200	19,000
SKF	SKF 6307-2RS-C3	33,200	19,000

Available Variants

The NSK 6307 base bearing is available in these configurations:

NSK 6307-NR

Open with snap ring

NSK 6307-ZZ-C3

Double shielded, C3 clearance

NSK 6307-C3

Open, C3 clearance

NSK 6307-2Z

Double metal shielded (ISO)

NSK 6307-ZZ

Double metal shielded

NSK 6307-2RS

Double rubber sealed

NSK 6307

Open (no seal/shield)

Frequently Asked Questions

What are the dimensions of the NSK 6307-2RS-C3?

The NSK 6307-2RS-C3 has a bore diameter of 35mm, outside diameter of 80mm, and width of 21mm. It weighs 0.413kg.

What is the load capacity of the NSK 6307-2RS-C3?

The dynamic load rating (Cr) is 33,200 N and the static load rating (C₀r) is 19,000 N. The maximum recommended speed is 8,500 rpm with grease lubrication or 10,000 rpm with oil lubrication.

What bearings are equivalent to NSK 6307-2RS-C3?

The 6307-2RS-C3 is manufactured by multiple brands including SKF, NTN, NSK, FAG, Timken, KOYO, and NACHI. All versions share the same 35×80×21mm dimensions and are interchangeable in most applications. See the cross-reference table above for detailed comparisons.