- Fa - axial load
- | Fr - radial load
- | P - dynamic equivalent load
- | PN/P0 tolerance class for radial bearings (without tapered roller bearings)
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In the case of single-row angular contact ball bearings, the typical contact angle is 40° (design -B). Unlike with spindle bearings with significantly smaller contact angles, this allows very high axial loads to be transferred at simultaneously high radial loads.
Single-row angular contact ball bearings in a universal design are provided for paired installation in an X, O or tandem arrangement. Universal design means that the raceways and lateral surfaces of the rings are smoothed in such a way that any bearings having the same size and design can be directly built into the desired assemblies. A distinction can be made between the following universal designs depending on the desired axial play:
UA with axial play
BG without play (no pre-tensioning), 40° contact angle (typical Japanese design)
UO without play (without pre-tensioning)
UL slight pre-tensioning
UM medium pre-tensioning
US strong pre-tensioning
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.
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.
Gap-type seal with moderate sealing effect against coarse contamination. Has effective sealing that protects against lubricant leaks and therefore a long service life. As standard, the seal is made of steel sheet and has a recommended temperature resistance of -40 °C to +160 °C.
Single-row angular contact ball bearings are axially pre-tensioned and are therefore free of play.
Double-row angular contact ball bearings are available in various bearing clearance classes. The bearing clearance of a bearing is identified by means of its C mark (C0, C2, C3 ...). It should be noted that the bearing clearance is measured in the axial direction.
C0/CN: standard bearing clearance class. This mark is usually omitted.
C2: reduced bearing clearance, for a bearing that is as rigid and free of play as possible
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.
Designs made of steel sheet are available as
- serpentine cage for an increased number of balls and therefore an increased load rating
- snap-type cage in a standard design suitable for increased operating temperatures
Designs made of polyamide PA66
- snap-type cage
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.
We use the following lubricant manufacturers as standard:
- Kyodo Yushi
- Klüber Lubrication
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.
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 ...
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 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.
Various contact angles
Double-row angular contact ball bearings are available in different contact angles. Ideal for tailoring to your application!
Compact unit (instead of two single-row angular contact ball bearings) without additional pre-tensioning measures.
Double-row angular contact ball bearings consist of two angular contact ball bearings combined in an X arrangement that are united in a single assembly and can handle both radial forces and axial forces on both sides. By contrast, there are designs with a filling groove in order to increase the load rating using a larger number of balls. These designs are only one-sided, but despite this they can handle very high axial loads and have a steel serpentine cage.
The contact angle α (alpha) determines the optimum ratio of radial and axial forces. You can find typical designs on the product page for angular contact ball bearings.