NSK 7302 BW (15 x 42 x 13) Angular Contact Bearing

Precision angular contact bearing 7302 BW NSK, 15x42x13, single-row

Technical Description & Applications — NSK 7302 BW (15 x 42 x 13)

The NSK 7302 BW is a single-row angular contact ball bearing, with an inner diameter of 15 mm, an outer diameter of 42 mm, and a width of 13 mm. It is designed to handle combined radial and axial loads in one direction.

Key Features & Benefits

• Bore / Outer / Width: 15 mm x 42 mm x 13 mm

• Angular contact design: typically 40° contact angle, suited for axial and radial load handling

• Single-row configuration: compact and efficient for precision applications

• Steel cage: durable sheet steel cage to maintain ball alignment under load

• Open type (no seals): allows for high-speed operation and effective lubrication

• Operating temperatures: commonly rated from -20 °C to +150 °C under standard conditions

• Applications: used in spindles, small motors, precision machinery, tool heads, CNC spindles

Use Cases

This bearing is ideal where compact size and combined load capability are required:

• Spindle assemblies in CNC machines

• High-speed motors

• Tool holders and rotating heads

• Precision linear mechanisms with axial load components

Installation Tips & Best Practices

• Maintain cleanliness during installation — contamination degrades performance

• Use precise press-fitting tools to avoid damaging inner/outer races

• Ensure alignment and avoid misloading axially in the wrong direction

• Use appropriate lubricants (grease or oil) suitable for speed and temperature

• Monitor bearing during operation, particularly under high speeds or loads

❓ FAQ

Q: What does “7302 BW” mean?
A: It’s the model designation: “7302” refers to the series and size, “BW” typically means a steel cage and 40° contact angle.

Q: What dimensions does this bearing have?
A: It has a 15 mm bore, 42 mm outer diameter, and 13 mm width.

Q: Is this bearing sealed?
A: No — the 7302 BW variant is open (no sealing), which helps with cooling and lubrication in high-speed applications.

Q: Can it handle axial loads?
A: Yes — as an angular contact bearing, it can support axial loads in one direction in combination with radial loads.

Q: In which machines is it commonly used?
A: CNC spindles, precision rotating heads, tool holders, small motors, and other high-speed rotating machinery.