Self adjusting spherical roller bearing

Product reference: 22206EK

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BAS-ERP image and text block
Dimensions Basic Load Rating Limiting speed
Dynamic Static Grease
Bearing No. d1 D B rsmin B1 d2 B2 B0 KN rpm
22205 K-CW33 + H305 20 52 18 1,0 29 38 8 3,7 43 45 7500
22206 K-CW33 + H306 25 62 20 1,0 31 45 8 3,7 59 62 6300
22207 K-CW33 + H307 30 72 23 1,1 35 52 9 3,7 81 88 5300
22208 K-CW33 + H308 35 80 23 1,1 36 58 10 5,5 88 100 4800
22209 K-CW33 + H309 40 85 23 1,1 39 65 11 5,5 95 105 4500
22210 K-CW33 + H310 45 90 23 1,1 42 70 12 5,5 100 120 4000
22211 K-CW33 + H311 50 100 25 1,5 45 75 12 5,5 120 140 3800
22212 K-CW33 + H312 55 110 28 1,5 47 80 13 5,5 145 175 3400
22213 K-CW33 + H313 60 120 31 1,5 50 85 14 5,5 180 220 3000
22215 K-CW33 + H315 65 130 31 1,5 55 98 15 5,5 190 250 2800
22216 K-CW33 + H316 70 140 33 2,0 59 105 17 5,5 210 275 2600
22217 K-CW33 + H317 75 150 36 2,0 63 110 18 8,3 250 325 2400
22218 K-CW33 + H318 80 160 40 2,0 65 120 18 8,8 305 410 2200
22219 K-CW33 + H319 85 170 43 2,1 68 125 19 8,8 340 450 2200
22220 K-CW33 + H320 90 180 46 2,1 71 130 20 8,3 375 500 2200

WHY SPHERICAL ROLLER BEARINGS?

IRREPLACEABLE IN MANY DEMANDING APPLICATIONS.

Spherical roller bearings offer an attractive combination of design features, which are making them irreplaceable in many demanding applications.

• Self-aligning Spherical roller bearings allow misalignment between shaft and housing without increase of friction and without reduction of bearing life. 

• Very high load carrying capacity   Optimum layout inside available cross-section provides maximum radial and  axial load carrying capacity.

• Robust
  Insensitive to misalignment caused by shaft or housing deflection due to heavy load.

• Easily fitted for loads in all directions
  The bearings are non-separable and ready to install using a number of
  mounting methods.

• Easy bearing application
  The favourable design characteristics and mounting enable for a more efficient and
  compact machine design

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]

Permissible angular misalignment

Sizes up to 50mm diameter 2 degrees.
Sizes bigger than 50mm diameter  1,5 degrees.


GENERAL INFORMATION OF SPHERICAL ROLLER INSERTS

DESIGNS OF SPHERICAL ROLLER BEARINGS 

Spherical roller bearings operate in arduous conditions. The spherical rollers can be symmetrical or unsymmetrical and are self-aligning in the outer ring sphered raceway. Thus, the possible co-axiality deviations of the supporting bearings as well as shaft bending can be compensated. Spherical roller bearings are manufactured in the following constructive versions, depending on the bearing size and series: These bearings have a central fixed rib and machined cages guided on the inner ring rib.

nner ring rib.

MB Design (standaard for Extreme Bearing)

These bearings have a central fixed rib and machined cages guided on the inner ring rib.

Odoo text and image block

C Design

These bearings have a central guide rib floating on the inner ring, symmetrical rollers with

larger dimensions so that the load carrying capacity increases. Special pressed sheet cage.

Bearings of this design are of small and medium sizes.

.

Odoo text and image block

CA Design

These bearings have side shoulders and one-piece machined brass cage. They also have

symmetrical rollers with larger dimensions so that the load carrying capacity increases. This design

is available for medium and large-sized bearings.

Odoo text and image block

Other constructive versions are shown below:

cylindrical bore, lubrication groove and holes in the outer ring

Odoo text and image block

tapered bore, lubrication groove and holes in the outer ring

(taper 1:12, 1:30)

Suffixes:

C - modified inner design, increased basic load, symmetrical rollers, pressed sheet

CA - modified inner design, increased basic load, one-piece machined brass cage

F2, F3 - constructive modifications

K - tapered bore bearings, taper 1:12 (standaard for Extreme Bearing)

K30 - tapered bore bearings, taper 1:30

MA - machined brass cage guided on the outer ring

MB - machined brass cage guided on the inner ring (standaard for Extreme Bearing)

P - two-pieces outer ring

W33 - lubrication groove and holes in the outer ring cage (standaard for Extreme Bearing)

Tolerances

Spherical roller bearings with both cylindrical and tapered bore, are manufactured in normal

tolerance class (see chapter BEARIUNGS TOLERANCES)

Radial clearance

Spherical roller bearings are generally manufactured with normal radial clearance. At request, they can be manufactured with clearances larger than normal (C3, C4 etc.) or smaller than normal (C2). 

The limits values of the radial clearance measured on unloaded bearings are in accordance with SR ISO 5753 and are given in table 1 and 2.

A Section Subtitle

Radial clearance of spherical roller bearings
with cylindrical bore
 
Table 1
Bore diameter C2 Normal C3 C4 C5
d min. max. min. max. min. max. min. max. min. max.
mm µm
14 18 10 20 20 35 35 45 45 60 60 75
18 24 10 20 20 35 35 45 45 60 60 75
24 30 15 25 25 40 40 55 55 75 75 95
30 40 15 30 30 45 45 60 60 80 80 100
40 50 20 35 35 55 55 75 75 100 100 125
50 65 20 40 40 65 65 90 90 120 120 150
65 80 30 50 50 80 80 110 110 145 145 180
80 100 35 60 60 100 100 135 135 180 180 225
100 120 40 75 75 120 120 160 160 210 210 260
120 140 50 95 95 145 145 190 190 240 240 300
140 160 60 110 110 170 170 220 220 280 280 350
160 180 65 120 120 180 180 240 240 310 310 390
180 200 70 130 130 200 200 260 260 340 340 430
200 225 80 140 140 220 220 290 290 380 380 470
225 250 90 150 150 240 240 320 320 420 420 520
250 280 100 170 170 260 260 350 350 460 460 570
280 315 110 190 190 280 280 370 370 500 500 630
315 355 120 200 200 310 310 410 410 550 550 690
355 400 130 220 220 340 340 450 450 600 600 750
Radial clearance of spherical roller bearings
with tapered bore (standaard for Extreme Bearing)
 
Table 2
Bore diameter C2 Normal C3 C4 C5
d min. max. min. max. min. max. min. max. min. max.
mm µm
10 24 15 25 25 35 35 45 45 60 60 75
24 30 20 30 30 40 40 55 55 75 75 95
30 40 25 35 35 50 50 65 65 85 85 100
40 50 30 45 45 60 60 80 80 100 100 130
50 65 40 55 55 75 75 95 95 120 120 160
65 80 50 70 70 95 95 120 120 150 150 200
80 100 55 80 80 110 110 140 140 180 180 230
100 120 65 100 100 135 135 170 170 220 220 280
120 140 80 120 120 160 160 200 200 260 260 330
140 160 90 130 130 180 180 230 230 300 300 380
160 180 100 140 140 200 200 260 260 340 340 430
180 200 110 160 160 220 220 290 290 370 370 470
200 225 120 180 180 250 250 320 320 410 410 520
225 250 140 200 200 270 270 350 350 450 450 570
250 280 150 220 220 300 300 390 390 490 490 620
280 315 170 240 240 330 330 430 430 540 540 680
315 355 190 270 270 360 360 470 470 590 590 740
355 400 210 300 300 400 400 520 520 650 650 820

Dimensions

The main dimensions of spherical roller bearings are in accordance with ISO 15 and national standard SR 3918 respectively.

Misalignments

Spherical roller bearings allow angular misalignment between the outer ring and inner ring without any influence on the bearing rating life. Under normal loads and operating conditions and when the inner ring rotates, the values of the permissible misalignment depending on the bearing

series are given in table 3.

Permissible angular misalignment
Table 3
Bearing series Permissible angular misalignment degrees
213 1
222 (standaard for Extreme Bearing) 15
223 2
230 15
231 15
232 25
239 15
240 2
241 25

Cages

Small and medium size spherical roller bearings are fitted with pressed sheet or machined brass cages (Y). Bearings of normal design are fitted with machined brass or steel cages guided on the rollers (M), inner ring (MB) or outer ring raceway (MA).

Glass fiber reinforced poly amide 6.6 cages are success-fully used for small and medium size bearings if the operating temperature doesn’t exceed +120?C.

Large-size bearings are fitted with machined brass cages, CA design.

Designs and some technical data are given in table 4.

Lubrication grooves and holes

Spherical roller bearings are provided with a lubrication groove and holes in the outer ring, excepting those of series

213. Designation suffix W33 is used to identify this feature on bearings. The dimensions of the groove, bore diameter and their number depending on the dimension series are given in table 5.

Heat treatment

Spherical roller bearings with outside diameter D>240 mm of all series given in this cataloger are stress revealed. Therefore, they can be used up to an operating temperature of +200?C.The hardness of the rings should not be lower than 59 HRC. Small sized bearings operate normally at temperatures up to +120C.

Axial load for bearings mounted on adapter sleeves

If the spherical roller bearings are mounted on a smooth shaft using an adapter sleeve, without side support, the axial load carrying capacity depends on the friction be-tween shaft and sleeve.

Considering that the mounting is correctly done, the permissible axial load can be accurately enough deter-mined using the following equation:

Fa max = 3 Bd, kN

where:

Fa max – maximum permissible axial load, kN,

B – bearing width, mm,

d – bearing bore diameter, mm.

Equivalent dynamic radial load

Pr = Fr + Y1Fa, kN, for Fa/Fr <=e, Pr = 0,67 Fr + Y2Fa, kN, for Fa/Fr >e,

The values of the factors depending on the bearing type can be found in bearing tables

Equivalent static radial load

P0r = Fr + Y0Fa, kN

The value of the factor Yo depending on the bearing type can be found in bearing tables.

Abutment dimensions

For a proper location of bearing rings on the shaft and housing shoulder respectively, shaft (housing) maximum connection radius ru max should be less than bearing minimum mounting chamfer rs min.

Shoulder height should also be properly sized in case of bearing maximum mounting chamfer.

The values of the connection radii and support shoulder height are given in table 6.