Brand: NTN
ID: 6306 NC3

Description:

 

6306NC3 – NTN Deep Groove Ball Bearing (Single Row, Snap Ring Groove, C3 Clearance)

Brand: NTN
Item Number: 6306NC3
Category: Deep Groove Ball Bearings – Single Row
EAN: 4547359388008
Country of Origin: Japan
Customs Tariff Number: 8482 1090 (typical for ball bearings)

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Product Description

The NTN 6306NC3 is a single-row deep groove ball bearing engineered for high-speed performance and long-term reliability.
This version features a snap ring groove (N) on the outer ring for easy axial positioning in housings and a C3 internal clearance for applications where thermal expansion or higher operating speeds are expected.

Manufactured from premium bearing steel with a standard steel cage, this open-type bearing offers smooth operation, excellent precision, and long service life in electric motors, gearboxes, pumps, and general machinery.

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Technical Specifications

Parameter	Metric	Imperial
Inner Diameter (d)	30 mm	1.1811 in
Outer Diameter (D)	72 mm	2.8346 in
Width (B)	19 mm	0.748 in
Weight	0.346 kg	—

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Design Features

• Type: Deep Groove Ball Bearing – Single Row
• Bore: C – Cylindrical
• Seal: None (Open design)
• Cage Type: S – Steel or standard cage
• External Modification: N – Snap ring groove in outer ring
• Internal Clearance: C3 – Larger than normal (for high-speed/temperature applications)
• Precision Class: P0 / PN (Standard, ABEC 1)
• Lubrication: Standard factory grease or oil lubrication
• Heat Stabilization: None – suitable up to +120 °C
• Special Treatment: None

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Suffix Description

• N: Snap ring groove in outer ring
• C3: Internal clearance larger than normal

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Performance Advantages

• High radial load capacity with low friction.
• C3 clearance supports higher rotational speeds.
• Snap ring groove simplifies axial retention in housings.
• Robust steel cage for long service life.

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Typical Applications

• Electric motors and generators
• Pumps and compressors
• Industrial gearboxes
• Agricultural and construction equipment
• Fans and blower