2205 2205K Self-aligning ball bearings,cylindrical and tapered bore

Self-aligning ball bearings have two rows of balls and a common concave sphered raceway in the outer ring. The bearing is consequently self-aligning and insensitive to angular misalignments of the shaft relative to the housing. It is particularly suitable for applications where considerable shaft deflections or misalignment are to be expected. Additionally, the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables it to run cooler even at high speeds.

Self-aligning ball bearings are available with either a cylindrical or tapered bore. Bearings with a tapered bore can be mounted directly on a shaft or on an adapter or withdrawal sleeve.

Self-Aligning Double Row Ball Bearings are designed to work in applications where severe misalignment exists whether from mounting or shaft deflection.  The concave raceway of the outer ring in combination with two rows of balls operate over a wide range of contact angles.  Furthermore it aligns itself correctly with the shaft and assembly without causing undue stress on the rest of the bearing assembly.

Specifications of self-aligning ball bearings 2205 2205K

2205 2205K Self Aligning Ball Bearing has a spherical outer ring raceway, the balls and cage continue to rotate, this type of bearings is suitable when the displacement of the centers around which the shaft and housing rotate and shaft deflection are likely to occur.Bearing is made of Chrome Steel.

Retainers for Self-Aligning Double Row Ball Bearings
Standard retainers for double row self-aligning bearings are all snap-type, and are made of either pressed steel, or molded polyamide. Each retainer is of crown design with the open ends towards each face of the bearing to allow for bearing assembly. Other retainer material types are available upon special request.  Please contact CLUNT engineering for information on other retainer materials.

Radial Clearance for Self-Aligning Double Row Ball Bearings
Similar to standard radial ball bearings, double row self-aligning ball bearing radial clearance is designated by C0 (normal), C2, C3, of C4. Below is a table which shows each radial clearance designation with respect to the bearing bore diameter.

Life and Load Ratings for Self-Aligning Double Row Ball Bearings
This section will present the various calculations used to determine various life and load solutions for
self-aligning double-row ball bearings:
Equivalent Dynamic Radial Loads
To calculate equivalent dynamic radial loads for double row self-aligning bearings, one of two calculations can
be used. The calculations are shown below:
P = FR +Y1FA,
     where FA/FR ≤ e
or
P = 0.65FR + Y2FA,   where FA/FR >e
P = Dynamic equivalent radial load
FR = Radial load
FA = Axial load
Y1 = Thrust load factor
Y2 = Thrust load factor
e = limiting factor for FA/FR 

 Static Equivalent Radial
To calculate static equivalent radial loads for Double row self-aligning ball bearings, use the following equation:
P0 = FR + Y0FA
P0 = Static equivalent radial load
FR = Radial Load
FA = Thrust Load
Y0 = Thrust load factor 
 

 Life Ratings
Life ratings for double row self-aligning bearings are calculated in either millions of revolutions, or in hours. Both
calculations are shown below:
L10 =(C/P)
3
(millions of revs.)
or
L10h = (16667/n) x (C/P)
3
(hours)
C = Basic dynamic load rating
P = Dynamic equivalent radial load
n = Speed in RPM
Minimum Load
Similar to all styles of rolling bearings, to ensure that the double row self-aligning ball bearing will operate
satisfactorily, a minimum load must be applied. The minimum load is applied in order to eliminate the possibility
for ball sliding at high speeds or accelerations.  The minimum load calculation is shown below:
P0m = 0.01Co
P0m = minimum equivalent static bearing load
C0 = basic static load rating