SKF NJ309ECJ — Cylindrical Roller Bearing (Single Row), NJ Design, Pressed Steel Cage, Explorer (45x100x25 mm)

Specifications

• Brand: SKF
• Item Number / MPN: NJ309ECJ
• EAN: 7316577034885
• Category: Cylindrical Roller Bearing — Single Row
• Bore Type: Cylindrical bore
• Seal: None (open bearing)
• Radial Internal Clearance: CN (normal)
• Cage Type: J — Pressed steel cage (roller centered, unhardened)
• Tolerance / Accuracy: Dimensional accuracy P0/PN (ABEC 1); running accuracy P6 (ABEC 3)
• Current Insulation: None
• Outer Ring: Without groove / lubrication holes
• Version: Improved internal construction (Explorer)

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)

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 +150°C (steel cage; application/lubrication dependent)

Suffix / Internal Design Meaning

• EC: Optimized internal design incorporating more and/or larger rollers, with modified roller/end flange contact
• J: Pressed steel cage, roller centered, unhardened

SKF NJ309ECJ is a single-row cylindrical roller bearing with an optimized internal design and a pressed steel cage, suitable for demanding industrial applications requiring high radial load capacity and dependable operation. The NJ design works as a support/semi-locating bearing, carrying axial load in one direction while allowing axial displacement in the opposite direction—helpful for accommodating thermal expansion. The separable ring construction simplifies installation and servicing, and the steel cage design supports stable performance across a broad operating temperature range.

Typical Applications

Commonly used in:

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

   PACKAGE INCLUDES: ONE (1) SKF  Bearing NJ309 ECJ