Double row self aligning ball bearing
|Dimensions||Basic Load Rating||Limiting speed|
|2205 K-2RS-TN + H305||20||52||18||1||29||38||8||12,5||3,45||7000|
|2206 K-2RS-TN + H306||25||62||20||1||31||45||8||15,7||4,7||5300|
|2207 K-2RS-TN + H307||30||72||23||1,1||35||52||9||16||5,2||5600|
|2208 K-2RS-TN + H308||35||80||23||1,1||36||58||10||19||6,5||4800|
|2209 K-2RS-TN + H309||40||85||23||1,1||39||65||11||22||7,5||4500|
|2210 K-2RS-TN + H310||45||90||23||1,1||42||70||12||22,9||8,1||4000|
|2211 K-2RS-TN + H311||50||100||25||1,5||45||75||12||25||9,6||4800|
|2212 K-2RS-TN + H312||55||110||28||1,5||47||80||13||30||11,2||4300|
|2213 K-2RS-TN + H313||60||120||31||1,5||50||85||14||32,5||12,5||4000|
|2215 K-2RS-TN + H315||65||130||31||1,5||55||98||15||42.5||15||4500|
|2216 K-2RS-TN + H316||70||140||33||2||59||105||17||45||17.5||4000|
|2217 K-2RS-TN + H317||75||150||36||2||63||110||18||55||22||3800|
|2218 K-2RS-TN + H318||80||160||40||2||65||120||18||68||25||3600|
|2219 K-2RS-TN + H319||85||170||43||2,1||68||125||19||80||30||3400|
|2220 K-2RS-TN + H320||90||180||46||2,1||71||130||20||90||35||3200|
WHY SELF-ALIGNING DOUBLE ROW BALL BEARINGS?
Self-Aligning Double Row Ball Bearings
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.
Standard Self-Aligning Double Row Ball Bearings are produced with straight bores; however, tapered bores are available upon request. Noteworthy is that the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables it to run cooler even at high speeds. Furthermore, the design allows for easy mounting and dismounting.
Both he bearing housing and the bearing it self are sealed.
the bearing insert is lifetime greased.
Greasing is using to drift pollution from the seals and prevent intrusion of water.
Standard is Extreme Bearing using a sealed bearing but when is needing a wider misalignment, a bearing without 2rs seals is recommended
Permissible angular misalignment = 1,5 degrees
Permissible angular misalignment whitout 2rs seals = 2,5 degrees
Double Row Self-Aligning Ball Bearings
This design of bearing utilizes two rows of balls, with the inner ring having two deep groove raceways and the outer ring a single continuous spherical raceway. This permits the inner and outer ring to be misaligned relative to each other through a comparatively large angle without imposing moment loads upon the balls. This bearing is frequently used when the inner ring is to be mounted upon an adapter sleeve or when conditions in the machine make it difficult to assure accurate alignment of the inner and outer rings. Due to the small contact angle, the thrust capacity of these bearings is limited.
Axial loading capacity
Axial load ratio of bearings mounted with adapter sleeves.
When mounting double row spherical roller bearings to a shaft using adapter sleeves the axial load rating depends on the friction between the shaft and the adapter sleeve. For the properly installed bearings the acceptable axial load can be calculated as follows:
Fap = 0.003 · B · d1
Fap = maximum permissible axial loading capacity [kN]
B = bearing width [mm]
d1 = bearing bore diameter [mm]
In order to provide satisfactory operation, double row angular contact ball bearings, like all ball and roller bearings, must always be subjected to a given minimum load, particularly if they are to operate at high speeds or are subjected to high accelerations or rapid changes in the direction of load. Under such conditions the inertia forces of the balls and cages, and the friction in the lubricant, can have a detrimental influence on the rolling conditions in the bearing arrangement and may cause damaging sliding movements to occur between the balls and raceways.
The requisite minimum radial load to be applied to double row angular contact ball bearings can be estimated using