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NTN RNA4911S machined ring needle roller bearing without inner ring, 55 mm bore, steel cage, open design. Clearance-adjustable for compact radial load support using a hardened shaft as the inner raceway. High carbon chrome steel construction for durability in industrial applications.
MODEL RNA4911S
$819.68 Each
Prices are subject to change
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Returnable:No
B (in)
0.9843
Bearing Design
w/o Inner Ring
Bearing design
w/o Inner Ring
Bearing Type
Needle Roller Bearing
Cage Material
Steel
Cage material
Steel
Configuration
One
D (in)
3.1496
Da max
2.7559 in
Dynamic Load Rating
7400 lbf
Dynamic load rating
7400 lbf
Enclosure
Open
Fw
2.4803 in
I.D.
63 mm
Limiting Speed - Grease
4300 RPM
Limiting speed - grease
4300 RPM
Limiting Speed - Oil
6500 RPM
Limiting speed - oil
6500 RPM
Material
High carbon chrome steel
O.D.
80 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 0
r (in)
0.0394
ras max
0.0394 in
Roller Type
Needle
Roller type
Needle
Static Load Rating
14700 lbf
Static load rating
14700 lbf
Type
Clearance-Adjustable Needle Roller Bearing
Technical Specifications
Type | Clearance-Adjustable Needle Roller Bearing |
Roller Type | Needle |
Bearing Type | Needle Roller Bearing |
Configuration | One |
Bearing Design | w/o Inner Ring |
Material | High Carbon Chrome Steel |
Cage Material | Steel |
Limiting Speed - Oil | 6500 RPM |
Limiting Speed - Grease | 4300 RPM |
Precision | ISO Class 0 |
Enclosure | Open |
Static Load Rating | 14700 lbf65500 N65.50 kN |
Dynamic Load Rating | 7400 lbf33000 N33.00 kN |
Weight | 0.467 lb0.212 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.