DKFL 5302 2RS C3 Angular Contact Ball Bearing
The DKFL 5302 2RS C3 (interchangeable with standard ISO designation 3302 2RS C3) is a premium heavy-duty double row angular contact ball bearing engineered for 15 mm diameter shafts. Structurally, it integrates two opposed raceway rows with high-precision steel balls, functioning as a factory-matched pair of single row angular contact bearings arranged in a rigid Back-to-Back (DB) configuration within an ultra-compact single envelope.
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Product Detail
Double Row Angular Contact Ball Bearing DKFL 5302 2RS C3 (3302 2RS) Simultaneous Bidirectional Axial & Heavy Radial Load Capacity | 15 mm Bore | C3 Clearance | Dual Rubber Seals
Compact, highly rigid construction equivalent to a back-to-back single-row bearing pair: exceptional tilting moment resistance, high-speed stability, and maintenance-free pre-greased operation.
Technical Overview: DKFL 5302 2RS C3
The DKFL 5302 2RS C3 (interchangeable with standard ISO designation 3302 2RS C3) is a premium heavy-duty double row angular contact ball bearing engineered for 15 mm diameter shafts. Structurally, it integrates two opposed raceway rows with high-precision steel balls, functioning as a factory-matched pair of single row angular contact bearings arranged in a rigid Back-to-Back (DB) configuration within an ultra-compact single envelope.
This specialized internal geometry allows the bearing to accommodate heavy radial loads combined with bidirectional thrust (axial) forces, while maintaining outstanding stiffness against tilting moments and angular misalignment forces. Equipped with reinforced dual contact nitrile rubber seals (2RS) and a factory-engineered C3 internal radial clearance, the DKFL 5302 delivers reliable, cool-running performance in demanding industrial installations without requiring periodic re-lubrication.
Part Number Breakdown (DKFL 5302 2RS C3)
5: Double row angular contact ball bearing identifier (standard industry designation, equivalent to prefix 3 under ISO 3302 nomenclature).
3: Medium/heavy-duty dimensional series (Series 53 / 33), offering thicker rings and larger rolling elements for higher dynamic load ratings than the lighter 52 series.
02: Standard bore size code: 02 corresponds directly to a 15 mm shaft bore.
2RS: Dual sheet steel-reinforced nitrile butadiene rubber (NBR) contact lip seals, delivering impermeable protection against dust, slurry, moisture, and abrasive contaminants.
C3: Greater than normal internal radial clearance (radial play), preventing thermal preloading, shaft expansion binding, and high-speed thermal seizure.
DKFL: Precision industrial bearing brand supplied with full quality assurance and certified distribution by Kamyar Gostar Iranian (KGICO).
Technical & Dimensional Specifications
| Bore Diameter (d) | Outer Diameter (D) | Width (B) | Row Configuration | Radial Clearance | Sealing Type | Raceway & Ball Material |
|---|---|---|---|---|---|---|
| 15 mm | 42 mm | 19 mm | Double Row | C3 (Expanded Internal Play) | 2RS (Dual Rubber Contact Seals) | 100Cr6 Chrome Bearing Steel |
Engineering Selection Guide: 5302 vs. 5202 (15 mm Bore)
When designing or refurbishing 15 mm shaft assemblies, choose between the two standard series based on envelope constraints and load envelopes:
| Part Number | Bore (d) | OD (D) | Width (B) | Application Focus |
|---|---|---|---|---|
| DKFL 5202 2RS | 15 mm | 35 mm | 15.9 mm | Light series; ideal for compact housings with moderate combined radial and axial loads. |
| DKFL 5302 2RS C3 | 15 mm | 42 mm | 19 mm | Reinforced medium series; wider envelope, larger balls, higher dynamic capacity, and superior tilting moment rigidity. |
Engineering Benefits & Technical Value
Bidirectional Thrust Containment
Unlike single row units limited to unilateral thrust, this bearing supports alternating axial forces in both directions with equal reliability.
Tilting Moment Resistance
The wide load-center spread acts like a DB bearing pair, resisting angular tipping moments and keeping the shaft true under cantilevered loads.
C3 Thermal Clearance Stability
Enlarged internal clearance absorbs thermal shaft growth and press-fit ring expansion, eliminating the hazard of ball binding at high speeds.
Factory 2RS Sealing
Dual lip contact seals keep factory grease securely inside while shielding the raceways from particulate matter, grit, and moisture.
Through-Hardened 100Cr6 Alloy
Premium high-carbon chromium steel heat-treated to 60–64 HRC with super-finished raceways for minimal rolling friction and extended fatigue life.
KGICO Corporate Guarantee
Supplied in genuine DKFL packaging with metallurgical trace integrity, official invoicing, and full engineering support from Kamyar Gostar Iranian.
Primary Industrial Applications
- Industrial & Booster Pumps: Impeller shaft axial location and resistance against dynamic fluid pressure pulses.
- Refrigeration, Screw & Reciprocating Compressors: Rotor shafts exposed to cyclic compression forces and continuous bidirectional thrust.
- Belt Tensioners & Industrial Idler Pulleys: Handling combined radial tension and asymmetric tilting loads induced by belt drives.
- Compact Industrial Gearboxes & Servomotors: Helical and bevel pinion shafts demanding tight axial backlash control.
- Continuous Processing & Packaging Lines: Heavy-duty drive rolls and tensioners requiring zero maintenance and high uptime.
Mounting Instructions & Safety Warnings
When press-fitting the bearing onto a 15 mm shaft, mounting force must be applied exclusively to the face of the inner ring. Never transmit mounting force through the outer ring, balls, or rubber seals, as doing so causes instant raceway brinelling and seal damage.
This bearing is pre-filled at the factory with high-grade synthetic grease engineered for its entire service life. Do not wash the bearing with solvents (gasoline, thinners, or kerosene) and do not attempt to pry open the 2RS seals.
Recommended Installation Method
Use mechanical fitting tool kits (matching sleeve and impact ring) or a low-tonnage hydraulic arbor press with an inner-ring backing sleeve to ensure true, uniform seating along the shaft axis.
Frequently Asked Questions (FAQ)
1. What are the key boundary dimensions of DKFL 5302 2RS C3?
This bearing features a 15 mm bore (inner diameter), 42 mm outer diameter, and a 19 mm width.
2. Is the 5302 interchangeable with the 3302 part number?
Yes. The designations 5302 and 3302 represent the identical physical bearing dimensions, internal double-row architecture, and load ratings, differing only between conventional and ISO coding formats.
3. Why is C3 radial clearance important in this bearing?
C3 clearance provides extra internal radial play to compensate for tight interference shaft fits and thermal expansion under high operating speeds, preventing overheating and bearing lockup.
Inquire & Order DKFL 5302 2RS C3 Bearings
Contact the industrial sales engineering team at Kamyar Gostar Iranian (KGICO) for current pricing, bulk stock inquiries, and certified supply chain delivery.
Check Stock & Submit Inquiry at kgico.co