N9 9*14*3mm Super Precision High-speed Cylindrical Roller Bearings
Without Outer Ring Single Row for Robot Reducers
N9 cylindrical roller bearing without outer ring,the inner diameter
d is 9 mm,the outer diameter D is 14mm,the width B is 3 mm.
Cylindrical roller bearings without an outer ring are known as
outer ring-less roller bearings. Such bearings are adopted in
specific application scenarios, for instance, in systems where
space is limited or special configurations are required. The design
without an outer ring makes the installation of the bearing more
flexible, allowing it to come into direct contact with other parts
to achieve specific mechanical functions. In certain industrial
applications, such as automotive transmission systems or precision
machinery, outer ring-less roller bearings are widely used due to
advantages like compact structure, lightweight, and high
load-bearing capacity.
| Name | High-speed Cylindrical Roller Bearings for Robot Reducers |
Bearing Number | Boundary Dimensions(mm) | Basic Load Rating(N) | Limiting Speed(rpm) |
| Inner Diameter | Outer Diameter | Width | Chamfer | Dynamic | Static | Grease | Oil |
| d | D | B | r(min) | Cr | Cor | Non-contact |
| mm | mm | mm | mm | N | N | r/min | r/min |
| N9 | 9 | 14 | 3 | 0.3 | 1760 | 1900 | 21200 | 26600 |
| N15 | 15 | 24 | 5 | 0.3 | 2560 | 2800 | 14300 | 17200 |
| N17 | 17 | 26 | 5.6 | 0.3 | 3560 | 3900 | 13300 | 16000 |
| N25 | 25 | 37 | 7 | 0.3 | 5120 | 5600 | 8700 | 10600 |
| N35 | 35 | 47 | 7 | 0.3 | 7390 | 8100 | 7300 | 6500 |
| N45 | 45 | 58 | 7 | 0.3 | 9300 | 10200 | 6900 | 6200 |
This series of products is continuously evolving and advancing in
response to growing customer demand.
Applications of Outer Ringless Cylindrical Roller Bearings (or Full
Complement Cylindrical Roller Bearings without Outer Rings)
Due to their compact structure, high load capacity, and ease of
installation, outer ringless cylindrical roller bearings are widely
used in various fields:
Reduction Gears and Gearboxes:
Primarily used in planetary gear reducers and industrial gearboxes,
their compact design saves space and enhances transmission
efficiency.
For example, planetary gearbox designs can directly utilize the
inner bore of gears as the outer raceway, simplifying the main unit
design.
Gearboxes in wind power drives require handling high torque and
impact loads, where these bearings meet heavy-duty requirements.
Construction Machinery:
Suitable for cranes, port machinery, mining equipment, and other
heavy machinery.
Components like pulley sets in lifting machinery and port cranes
need high radial load capacity.
In steel mill continuous casting machines and mining crushers,
bearings must remain stable under extreme conditions.
Automotive Industry:
Applied in critical components such as transmissions, steering
systems, and drive shafts.
Automotive transmissions require compact designs to reduce axial
dimensions while withstanding high-speed rotation and combined
loads.
The drivetrains of construction vehicles and heavy trucks rely on
the high reliability and easy maintenance of these bearings.
Wind Power Equipment:
Speed increasers and main shaft systems in wind turbines require
lightweight, long-life bearing solutions. These bearings adapt to
low-speed, heavy-load, and frequent start-stop conditions.
Precision Machinery and Automation Equipment:
Used in applications like machine tool spindles and robot joints,
where high precision and low friction characteristics enhance
equipment performance.
These bearings offer versatile solutions across a broad range of
demanding applications, ensuring reliability, precision, and
efficiency in everything from heavy industry to advanced automation
technologies.
