Self-aligning ball bearings
Self-aligning ball bearings are double-row rolling bearings and consist of an inner ring with two ball raceways and an outer ring whose raceway is in the shape of a hollow sphere. This enables angle maneuverability that can be used to compensate for skewing, shaft deflection or misalignment.
Product range
| Series | Description | available in ABEG® performance classes | |||
|---|---|---|---|---|---|
| 108 - 126 - 127 - 129 | miniature self-aligning ball bearings |  |  |  | |
| 12 - 13 - 22 - 23 | cylindrical | | | | |
| 12...-K - 13...-K - 22...-K - 23...-K | conical, for installation with adapter sleeve | | | | |
| 112- 113 | cylindrical, elongated inner ring | | | | |
| 22...-2RSK- 23...-2RSK | conical, sealed, for installation with adapter sleeve | | | ||
- Bearing clearance classes C2, CN, C3 and C4
- | Fa - axial load
- | P - dynamic equivalent load
- | PN/P0 tolerance class for radial bearings (without tapered roller bearings)
Technical information
Self-aligning ball bearings can be swiveled outward in the middle position, which allows them to compensate for misalignment, shaft deflection, and housing deformation.
- For a rotating inner ring: up to 4°, sealed bearing up to 1.5°
- For rotating outer ring or wobbling inner ring: lower
Inadequate sealing can allow external environmental conditions to negatively impact running characteristics and thus a bearing’s service life. For this reasons, bearings must be protected by seals.
Bearings with seals on both sides are generally lubricated for life.
At the same time, seals also prevent lubricants from leaking.
2RS / RS
A contact seal with effective sealing that protects against coarse and fine contamination. Also has very effective sealing that protects against lubricant leaks and therefore a long service life. By default, the seal consists of nitrile rubber and has a temperature resistance of -40 °C to +100 °C.
The bearing clearance of a bearing is identified by means of its C mark (C0, C2, C3 ...). Tapered bearings are usually used in the C3 design so that the bearing clearance is not unreliably decreased due to the installation of the adapter sleeve.
C0/CN: standard bearing clearance class. This mark is usually omitted.
C2: decreases bearing clearance
C3: higher bearing clearance than C0/CN
C4: higher bearing clearance than C3
C5: higher bearing clearance than C4, used in particular in high-temperature bearings.
Special tolerances based on customer specifications: CX.Y (upper dimension X in µm, lower dimension Y in µm).
Abutment dimensions and radial runout accuracy have a decisive impact on the service life and function of rolling bearings. The selection of the shaft, housing and bearing tolerance should therefore always be checked in advance.
The following tolerance classes are available:
- Standard tolerances available ex stock: P0/PN
- Special tolerances: P6, P5
Cage types may vary depending on the size and application type. We carry various cage designs made of steel sheet, plastics, and brass.
A lubricant selection that is precisely tailored to the application conditions contributes disproportionately to the service life both in a positive and in a negative sense. For this reason, the technical and economical optimization of lubricant is an important contribution made by our application consulting.
An essential property of greases and oils is the reliable mechanical separation of the rolling element from the raceway. Depending on the application, you need special types of grease to achieve this function. The following properties in particular affect the function:
- the starting and operating temperature
- the speed of the bearing
- the external ambient conditions (moisture, contamination, vapors/gases...)
Our application engineers would be happy to analyze your application conditions and recommend suitable lubricants.
More information on special lubricants Contact for applications consulting
We use the following lubricant manufacturers as standard:
- Kyodo Yushi
- Klüber Lubrication
- Shell
- Lubcon
- Mobil
- Fuchs
We would be happy to make you a concrete offer for special processing, including the use of greases, oils or preserving agents specifically requested by you.
Rings
Outer and inner rings are manufactured from 100Cr6 (German standard), SUJ2 (Japanese standard) or GCr15 (Chinese standard) as standard.
Stainless steel products according to the AISI standard: AISI420, AISI440, AISI630 ...
Cage
Steel sheet cages are manufactured from DC01A/ST12 as standard (without suffixes).
Plastic cages (suffix TN, TV,TVP ...) may have different specifications but are usually made of polyamide. High-temperature designs made of PEEK.
Brass cages (suffix M) have very good emergency running properties and can be used at temperatures of up to 150 °C.
Seals
Seals are manufactured from NBR (acrylonitrile butadiene rubber) as standard. This results in an operating temperature of -30 °C to +100 °C, even if the grease permits a higher temperature.
Findling Wälzlager has already realized more than 1,500 drawing parts for its customers. We will find you an economically and technically optimal solution for your application from the combination of ABEG® performance class and designs. You can trust 100 years of experience in rolling bearing technology.
