SKF NJ309ECP/C3 — Cylindrical Roller Bearing (Single Row), NJ Design, Polyamide Cage, Explorer, C3 Clearance (45x100x25 mm)

Specifications

• Brand: SKF
• Item Number / MPN: NJ309ECP/C3
• EAN: 7316577109279
• Category: Cylindrical Roller Bearing — Single Row
• Bore Type: Cylindrical bore
• Seal: None (open bearing)
• Radial Internal Clearance: C3 (greater than normal / slightly increased clearance)
• Cage Type: ECP — Glass fibre reinforced polyamide (PA66) cage
• Tolerance / Accuracy: Dimensional accuracy P0/PN (ABEC 1); running accuracy P6 (ABEC 3)
• Current Insulation: None
• Outer Ring: Without groove / lubrication holes
• Version: Explorer (improved internal construction)

Dimensions & Weight

• Bore (d): 45 mm (1.7717 in)
• Outside Diameter (D): 100 mm (3.9370 in)
• Width (B): 25 mm (0.9843 in)
• Weight: 0.916 kg (≈ 2.02 lb) (catalog values may vary slightly)

Design / Construction

• Roller Rows: Single row
• Design Type: NJ (support / semi-locating bearing)
• Outer ring with two rigid ribs
• Inner ring with one rigid rib
• Supports high radial loads and axial load in one direction
• Allows axial displacement of the shaft relative to the housing in one direction
• Inner ring removable on one side (separable design for easier installation)
• Can be used as a locating arrangement when combined with HJ angle ring(s) (sold separately)

Operating Range

• Operating Temperature Range: -30°C to +120°C (polyamide cage; application/lubrication dependent)

Suffix / Internal Design Meaning

• EC: Optimized internal design incorporating more and/or larger rollers, with modified roller/end flange contact
• P (ECP): Injection moulded cage of glass fibre reinforced polyamide 6,6 (PA66), roller centered
• C3: Internal clearance larger than normal

SKF NJ309ECP/C3 is a single-row cylindrical roller bearing with Explorer optimized internal construction, a glass fibre reinforced polyamide cage, and C3 internal clearance for applications where thermal expansion, interference fits, or operating temperature could reduce bearing clearance during operation. The NJ design is commonly used as a support/semi-locating bearing, carrying axial load in one direction while allowing axial displacement in the opposite direction. The separable ring design makes installation and maintenance easier, while the optimized internal geometry provides high radial load capacity and reliable performance.

Typical Applications

Commonly used in:

• Gearboxes and transmissions
• Electric motors
• Pumps and compressors
• Agricultural and industrial machinery
• General equipment requiring high radial load capacity with axial location in one direction

   PACKAGE INCLUDES: ONE (1) SKF  Bearing NJ309 ECP C3