ULTAGE series
The world's highest standard new generation of bearings with excellent long operating life, high-load capacity and high speed
"ULTAGE" (a name created from the combination of "ultimate," signifying refinement, and "stage," signifying NTN's intention that this series of products be employed in diverse applications) is the general name for NTN's new generation of bearings that are noted for their industry-leading performance.
■ULTAGE series features
- Longer service life
- High-load capacity
- Higher rotational speed
ULTAGE Spherical Roller Bearings [Type EA, Type EM]
Longer service life and higher rotational speed improve ease-of-use while contributing to more eco-friendly operation.
The ULTAGE Advantage [Type EA]
Longer Service Life
- Larger rollers provide the industry's highest load capacity.
- Extended maintenance intervals.
- Lighter and more compact design.
- Withstands operating temperatures up to 200°C.
Higher Rotational Speed
- The industry's highest allowable rotational speed.
- Simple window-type confi¬guration employs a pressed steel cage.
- The back face of the cage provides a guide function that eliminates the guide ring.
Improved Ease-of-Use
- Unique structure readily accepts lubricant.
- Easy application of grease.
POINT1 The industry's highest load capacity
These bearings have a significantly increased roller diameter and incorporate the maximum number of rollers, thus achieving both a high load capacity and a longer service life. Maintenance intervals can also be extended.
- ①Basic dynamic load rating: up to 65% greater than the NTN conventional design
- ②Basic dynamic load rating: up to 35% greater than the NTN conventional design
- ③Service life: up to five times longer than the NTN conventional design
■Roller diameter comparison
POINT2 The industry's highest allowable speed
The new pressed steel cage results in allowable bearing speeds up to 20% greater than NTN’s conventional design.
POINT3 Pressed steel cage provided as standard
The window-type pressed steel cage provides higher rigidity. Each roller pocket is provided with four tabs.
- ①The guide system employs a back-to-back cage system.
- ②Four tabs in each cage pocket stabilize the roller position.
- ③The innovative cage pocket shape ensures a stable supply of lubricating oil or grease into the bearing.
- ④A special surface treatment enhances wear resistance.
■Details of pocket for window-type pressed steel cage
POINT4 Compact, lightweight design
The increased load capacity contributes to a lighter and more compact design.
■Benchmarks
Model No. | Load rating (kN) | Boundary dimensions (mm) |
Bearing volume (cm³) |
Mass (kg) |
|
---|---|---|---|---|---|
Cr | C0r | ||||
22220B | 315 | 415 | φ100×φ180×46 | 810 | 4.95 |
22218EA | 385 | 398 | φ90×φ160×40 | 550 | 3.28 |
Results in approximately a 30% reduction in volume ratio and mass ratio
POINT5 Improved ease-of-use
Adoption of a simple window-type pressed steel cage improves ease of assembly/disassembly and grease application.
- ①Easier application of grease to the roller surface
- ②Improved roller retention contributes to easier assembly/disassembly
■Lubricating path
About type EM
For applications that expose bearings to severe vibration and impact, we recommend Type EM bearings, which incorporate a high-tension brass cage machined from a single piece.
(Type EM differs from Type EA in the shape of the inner ring.)