RNA6910 58x72x40mm Heavy Load Machined Needle Bearing Open Type For Construction Machinery Gearbox Transmission Parts
Price:
USD 0.8-3
MOQ:
1 PCS
Delivery Time:
3-5 working days
Brand:
GQZ /OEM
Product Description
RNA6910 58x72x40mm Heavy Load Machined Needle Bearing Open Type For Construction Machinery Gearbox Transmission Parts
Product Overview
- RNA6910 is an open double-row solid outer ring needle roller bearing without inner ring, standard dimension 58×72×40 mm. It is precisely manufactured from high-performance GCr15 bearing steel, fitted with stamped steel cage to stably retain two rows of needle rollers.Without independent inner ring, the quenched and precision-ground shaft surface acts directly as the rolling raceway, greatly saving radial installation space and allowing thicker shaft design for enhanced shaft strength. Featuring ultra-high radial load capacity and excellent structural rigidity, this open bearing supports convenient grease refilling and daily maintenance, widely adopted for heavy-duty compact transmission equipment in various industrial fields.
*Send inquiry to get latest factory price and technical datasheet for RNA6910 needle roller bearing.
Key Specifiions
| Parameter Item | Specifiion |
|---|---|
| Model | RNA6910 |
| Bearing Type | Double Row Machined Ring Needle Roller Bearing, Without Inner Ring |
| Raceway Bore Diameter (Fw) | 58 mm |
| Outer Diameter (D) | 72 mm |
| Overall Width (C) | 40 mm |
| Minimum Fillet Radius (r min) | 0.6 mm |
| Basic Dynamic Load Rating (Cr) | 79 kN |
| Basic Static Load Rating (C0r) | 163 kN |
| Limiting Speed (Grease Lubriion) | 5000 rpm |
| Limiting Speed (Oil Lubriion) | 7100 rpm |
| Cage | Stamped Steel Cage |
| Structure | Double Row Needle Rollers, Solid Integral Outer Ring |
| Seal Type | Open Type, No Seals |
| Material | GCr15 Bearing Steel |
| Approx Net Weight | 0.31 kg |
| Operating 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 exact overall dimensions of RNA6910 bearing?
A: Raceway bore 58mm, outer diameter 72mm, total width 40mm.
Q2: What is the difference between RNA6910 and NA6910?
A: RNA6910 has no inner ring and requires hardened ground shaft as rolling raceway;
NA6910 comes complete with inner ring for direct installation.
Q3: What surface treatment requirements for the matching shaft?
A: The shaft raceway surface must be quenched to HRC 58~62 and precision ground to avoid premature wear.
Q4: What are the limiting speeds under two lubriion modes?
A: Grease lubriion: 5000 rpm; Oil lubriion: 7100 rpm.
Q5: Can this bearing withstand large axial loads?
A: It is mainly designed for radial loads, only applicable for tiny axial displacement and slight axial loads.
Q6: Is this bearing sealed against dust and water?
A: It is open type without any sealing covers, not suitable for dusty, humid or splashing water working environments.
*Place bulk orders for MR series inch needle bearings, enjoy sufficient stock and fast delivery.
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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