SKF NJ309ECML/C3 — Cylindrical Roller Bearing (Single Row), NJ Design, Brass Cage, C3 Clearance (45x100x25 mm)

Specifications

• Brand: SKF
• Item Number / MPN: NJ309ECML/C3
• EAN: 7316570847451
• 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: ML — One-piece machined (form-turned) brass window-type cage, inner or outer ring centered
• 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

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: 1.01 kg (≈ 2.23 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 (brass cage; lubrication and application dependent)

Suffix / Internal Design Meaning

• EC: Optimized internal design incorporating more and/or larger rollers, with modified roller/end flange contact
• ML: One-piece form-turned brass cage, window-type, inner or outer ring centered
• C3: Internal clearance larger than normal

SKF NJ309ECML/C3 is a single-row cylindrical roller bearing with an optimized internal design, a one-piece machined brass cage, and C3 internal clearance for applications where operating temperature, interference fits, or shaft expansion may reduce 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 design simplifies installation and servicing, making it a reliable option for heavy-duty industrial equipment.

Typical Applications

Commonly used in:

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

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