DKFL BL 210 NR Deep Groove Ball Bearing
The BL series belongs to the category of deep groove ball bearings known as "Maximum Type" bearings. In this model, filling slots are machined into both the inner and outer rings, allowing more balls to be fitted compared to conventional series 62 ball bearings.
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Product Detail
Maximum Capacity Deep Groove Ball Bearing DKFL BL 210 NR Dimensions 50×90×20 mm | Filling Slot Design with Snap Ring (NR)
The BL 210 NR series deep groove ball bearing from DKFL features a unique filling slot design that accommodates a greater number of balls, delivering significantly higher load capacity than standard deep groove ball bearings. Supplied with a snap ring for axial location, this product is distributed by Kamyar Gostar Iranian (KGICO).
Technical Overview of the DKFL BL 210 NR (Maximum Type Series)
The BL series belongs to the category of deep groove ball bearings known as "Maximum Type" bearings. In this model, filling slots are machined into both the inner and outer rings, allowing more balls to be fitted compared to conventional series 62 ball bearings.
This increased ball count directly raises the radial load capacity (Dynamic & Static Load Ratings). In addition, the NR suffix indicates a groove and snap ring on the outer ring, which makes axial positioning and retention of the bearing inside the housing simple and reliable.
Designation and Structural Analysis (BL 210 NR)
Prefix BL: Identifies the maximum capacity design with filling slots, allowing the maximum number of balls to be loaded into the rings.
Number 210: Dimensionally equivalent to series 2 (similar to series 6210), with a 50 mm bore (10 × 5), a 90 mm outside diameter, and a 20 mm width.
Suffix NR: The letter N denotes a snap ring groove in the outer ring, and the letter R indicates that the snap ring itself is supplied for axial locking and location.
Brand DKFL: Manufactured under strict quality control standards with robust materials for heavy mechanical duty.
Distribution & Support: Supplied by Kamyar Gostar Iranian (KGICO) with guaranteed authenticity.
Technical Specifications and Dimensions Table
| Bore (d) | Outside Dia. (D) | Width (B) | Dynamic Load (Cr) | Static Load (C0r) | Design Type | Axial Retention |
|---|---|---|---|---|---|---|
| 50 mm | 90 mm | 20 mm | ~38.6–43.0 kN | ~34.8–35.0 kN | Filling Slot (BL) | Snap Ring (NR) |
Key Features and Competitive Advantages of the DKFL BL 210 NR
Higher Load Capacity (Maximum Type)
Filling slots allow a greater number of balls, supporting heavier radial loads than the standard series 62.
Axial Location via Snap Ring (NR)
A precision snap ring groove and ring enable axial retention within the housing without additional complex components.
Standard Interchangeable Dimensions
With the original 50×90×20 mm envelope retained, it can be easily retrofitted into existing equipment.
Efficiency and Suitable Speed
Smooth rotation and stable performance across a wide range of mechanical systems.
Durable DKFL Materials
Made from high-grade steel for optimal resistance to fatigue and wear.
Professional Supply by KGICO
Reliable technical support and industrial component supply from Kamyar Gostar Iranian.
Common Industrial Applications
- Heavy-duty industrial gearboxes: Shafts requiring series 62 dimensions but with higher load demands.
- Power transmission equipment and gear drives: Mechanisms requiring axial location via a snap ring.
- Industrial pumps and compressors: Heavy-duty pumps with concentrated radial loads.
- Construction and mining machinery: Mechanical assemblies with limited installation space but high applied loads.
- General drive systems: Equipment requiring reinforced ball bearings with an axial retention mechanism.
Installation, Maintenance, and Engineering Recommendations
Due to the filling slots in BL series bearings, their axial load capacity is more limited, and they are primarily intended for heavy radial loads. Pay careful attention to the direction of applied axial loads.
When fitting the bearing into the housing, make sure the snap ring is fully and uniformly seated in the housing groove to prevent axial play or displacement.
Proper Installation Without Direct Impact
When pressing the bearing onto the shaft or into the housing, apply force evenly and never strike the balls or cage directly with a hammer.
Frequently Asked Questions (FAQ)
1. What is the main difference between the BL 210 series and a standard 6210 ball bearing?
The BL series features filling slots that allow more balls to be fitted, resulting in a higher radial load capacity than the standard 6210 model.
2. What is the function of the NR suffix at the end of the product name?
The NR suffix indicates a groove in the outer ring together with a supplied snap ring, used for axial location and retention of the bearing within its housing.
3. What are the physical dimensions and weight of the BL 210 NR bearing?
This bearing has a 50 mm bore, a 90 mm outside diameter, and a 20 mm width (identical to the standard 6210 series envelope).
Request a Quote for the DKFL BL 210 NR Ball Bearing
For stock availability, wholesale price lists, and expert engineering consultation, contact the sales team at Kamyar Gostar Iranian (KGICO).
Inquire and Order at kgico.co