RNA6908 Double Row Needle Roller Bearing 48x62x40mm Without Inner Ring High Load For Reducer Hydraulic Motor
Price:
USD 0.8-3
MOQ:
1 PCS
Delivery Time:
3-5 working days
Brand:
GQZ /OEM
Product Description
RNA6908 Double Row Needle Roller Bearing 48x62x40mm Without Inner Ring High Load For Reducer Hydraulic Motor
Product Overview
- RNA6908 is an open double row machined outer ring needle roller bearing without inner ring, with standard dimensions 48*62*40 mm. Manufactured from premium GCr15 bearing steel, it adopts solid machined outer ring and steel stamping cage to hold two rows of needle rollers evenly.Without an independent inner ring, the hardened and ground shaft surface directly serves as the rolling raceway, greatly saving radial installation space. It features ultra-high radial load capacity and structural rigidity, suitable for compact installation positions subjected to heavy radial loads. The open design facilitates grease replenishment and routine maintenance, widely applied in various industrial heavy-duty transmission devices.
*Send inquiry to get latest factory price and technical datasheet for RNA6908 needle roller bearing.
Key Specifiions
| Parameter Item | Specifiion |
|---|---|
| Model | RNA6908 |
| Bearing Type | Double Row Machined Ring Needle Roller Bearing, Without Inner Ring |
| Roller Path Diameter (Fw) | 48 mm |
| Outer Diameter (D) | 62 mm |
| Overall Width (C) | 40 mm |
| Min Fillet Radius (r min) | 0.6 mm |
| Basic Dynamic Load Rating (Cr) | 74 kN |
| Basic Static Load Rating (C0r) | 116 kN |
| Limiting Speed (Grease Lubriion) | 5500 rpm |
| Limiting Speed (Oil Lubriion) | 9200 rpm |
| Cage | Stamped Steel Cage |
| Structure | Double Row Needle Rollers, Solid Outer Ring |
| Seal | Open Type, No Seals |
| Material | GCr15 Bearing Steel |
| Approx Net Weight | 260 g |
| Working Temperature | -30℃ ~ +120℃ |
Main Features
- No inner ring design: Compact radial layout, allows thicker shaft to enhance shaft strength.
- Double row needle roller arrangement: Extremely high radial load bearing capacity and excellent structural rigidity.
- Integral solid outer ring with double side ribs: Limits needle roller displacement, bears slight bidirectional axial force.
- Open structure: Convenient for lubricant filling and daily maintenance.
- Made of GCr15 steel: High hardness, outstanding wear resistance and long service life.
- Low section height: Ideal choice for equipment with limited radial installation space.
Typical Appliions
- Hydraulic motors, hydraulic pumps and hydraulic system components
- Gear reducers, gearboxes and transmission assemblies
- Construction machinery, agricultural machinery rotating parts
- Injection molding machine auxiliary moving components
- Heavy textile machinery, packaging equipment
- Automated production line heavy-duty rotary mechanisms
*Contact our technical team to confirm compatibility and bearing assembly suggestions.
Why Choose GQZ Bearing
- Strict raw material inspection, adopt high grade chrome bearing steel to guarantee hardness and wear resistance.
- Precision grinding process ensures accurate dimension and interchangeability with original equipment.
- Complete stock for MR series inch needle bearings, support sample testing and bulk wholesale.
- Professional technical support for bearing selection and assembly guidance.
- Accept OEM service, laser marking and customized packaging according to customer requirements.
FAQ
Q1: What are the key dimensions of RNA6908 bearing?
A: Fw 48 mm, outer diameter 62 mm, overall width 40 mm.
Q2: What is the difference between RNA6908 and NA6908?
A: RNA6908 has no inner ring and needs a hardened shaft as rolling raceway; NA6908 is complete with inner ring for direct installation.
Q3: What surface requirement is needed for the matched shaft?
A: The shaft raceway surface must be quenched to HRC 58-62 and precision ground to avoid premature abrasion.
Q4: What are the limiting speeds for grease and oil lubriion?
A: Grease lubriion limit speed: 5500 rpm; Oil lubriion limit speed: 9200 rpm.
Q5: Can this bearing bear large axial loads?
A: It is mainly designed for radial loads, only suitable for small axial displacement and slight axial loads.
Q6: Is this bearing sealed?
A: It is an open-type bearing without rubber or metal seals, not applicable for dusty or wet harsh environments.
*Place bulk orders for MR series inch needle bearings, enjoy sufficient stock and fast delivery.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Wuxi Guangqiang Bearing Trade Co.,Ltd
Location
No. 650 North Xingyuan Road, Beitang District, Wuxi, China.
Contact Person
Mike Zhang