NSK 3304B-2RSRTNGC3 YRLN5 — Angular Contact Ball Bearing (Double Row), Double Sealed, C3 Clearance (20x52x22.2 mm)

Specifications

• Brand: NSK
• Item Number / MPN: 3304B-2RSRTNGC3 YRLN5
• Category: Angular Contact Ball Bearing — Double Row
• Bore Type: Cylindrical bore
• Seal: 2RSR — Rubber seals on both sides (contact lip seals)
• Cage Type: TNG — Glass-fibre reinforced polyamide 66 cage
• Radial Internal Clearance: C3 (greater than normal / slightly increased clearance)
• Precision / Tolerance Class: P0 / PN2 / ABEC 1 (standard precision)
• Lubrication: YRL — Grease for operating temperature range -30°C to +120°C
• Heat Stabilization: None (up to 120°C)
• Ring Design: Standard (not split)

Dimensions & Weight

• Bore (d): 20 mm (0.7874 in)
• Outside Diameter (D): 52 mm (2.0472 in)
• Width (B): 22.2 mm (0.8740 in)
• Weight: 0.216 kg (≈ 0.48 lb)

Contact Angle / Internal Design

• B: Contact angle designation per NSK series (commonly associated with an angular contact design)
• Note on contact angle: Your data set mentions 40° for a comparable double-row design; this NSK designation is listed as B = 25° contact angle in the suffix notes. For listing purposes, I’m keeping the NSK suffix definition exactly as provided (B = 25°).

Suffix / Code Meaning

• B: 25° contact angle
• 2RSR: Rubber seals at each side of the bearing
• TNG: Cage made of glass-fibre reinforced polyamide 66
• C3: Internal clearance larger than normal
• YRL: Lubricant for operating temperature -30°C to +120°C
• N: Normal filling (35%)
• 5: Standard single pack (boxed packaging)

NSK 3304B-2RSRTNGC3 YRLN5 is a double-row angular contact ball bearing designed to support combined loads (radial loads plus axial loads in both directions). The double-row construction provides a compact solution similar to a matched pair of single-row angular contact bearings. This version features rubber seals on both sides (2RSR) to retain lubrication and reduce contamination, a glass-fibre reinforced polyamide cage (TNG), and C3 internal clearance for applications where operating temperature or press fits may reduce clearance during operation. The bearing is supplied with YRL grease rated for -30°C to +120°C operating conditions.

Typical Applications

Commonly used in:

• Electric motors and compact industrial drives
• Pumps and compressors
• Gearboxes and general machinery
• Equipment requiring a compact bearing that can handle axial load in both directions with sealed lubrication

   PACKAGE INCLUDES: ONE (1) NSK Bearing 3304 2RS TNG C3 YRLN5