Brand: SKF
ID: NJ309 ECP/C4

Description:

 

SKF NJ309ECP/C4 — Cylindrical Roller Bearing (Single Row), NJ Design, Polyamide Cage, Explorer, C4 Clearance (45x100x25 mm)

Specifications

• Brand: SKF
• Item Number / MPN: NJ309ECP/C4
• Also Known As: NJ309ETC4-VM, NJ309-E-XL-TVP2-C4
• EAN: 7316570735116
• Category: Cylindrical Roller Bearing — Single Row
• Bore Type: Cylindrical bore
• Seal: None (open bearing)
• Radial Internal Clearance: C4 (greater than C3 / strongly 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: Improved internal construction (Explorer)

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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: 0.895 kg (≈ 1.97 lb)

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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)

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Operating Range

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

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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
• C4: Bearing internal clearance greater than C3

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SKF NJ309ECP/C4 is a single-row cylindrical roller bearing with an optimized internal design and a glass fibre reinforced polyamide cage, intended for demanding applications requiring high radial load capacity and reliable performance. The C4 internal clearance (higher than C3) is typically selected for higher operating temperatures, larger thermal expansion, or tighter fits where normal clearance could be reduced 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 simplifies installation and maintenance.

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Typical Applications

Commonly used in:

• Gearboxes and transmissions
• Electric motors
• Pumps and compressors
• Agricultural and industrial machinery
• Equipment with higher operating temperatures or interference fits where extra clearance is required

 

   PACKAGE INCLUDES: ONE (1) SKF  Bearing NJ309 ECP C4