INA crossed roller bearing arrangements

INA crossed roller bearing support by the adjacent construction
Uniform support of the bearing rings by the adjacent construction

INA crossed roller bearings SX can support high loads. Due to the X arrangement of the cylindrical rollers, these bearings can support axial forces in both directions, radial loads, tiltingmoment loads and any combinations of loads. In order that these advantages can be utilised comprehensively, the adjacent construction must be designed so that it is appropriately rigid. The bearing rings must always be rigidly and uniformly supported over the circumference and width of the rings.

The adjacent construction must be designed only in accordance with the information in this section. Any deviations from the specifications, material strength and adjacent components will considerably reduce the load carrying capacity and operating lifeof the bearings.

Shart and housing tolerances for INA crossed roller bearing

For normal applications, the tolerance class K7 for the housing and h7 for the shaft are sufficient, please see the table below.

In precision applications, the bearing seat in the housing should be designed to tolerance class K6 and on the shaft to h6.

Mounting tolerances for the shaft

Nominal dimension
di
Tolerance classes
mm
h6 h7
Upper deviation Lower deviation Upper deviation Lower deviation
μm μm μm μm
65 80 0 –19 0 –30
80 100 0 –22 0 –35
100 120 0 –22 0 –35
120 140 0 –25 0 –40
140 160 0 –25 0 –40
160 180 0 –25 0 –40
continued
Nominal dimension
di
Tolerance classes
mm
h6 h7
Upper deviation Lower deviation Upper deviation Lower deviation
μm μm μm μm
180 200 0 –29 0 –46
200 225 0 –29 0 –46
225 250 0 –29 0 –46
250 280 0 –32 0 –52
280 315 0 –32 0 –52
315 355 0 –36 0 –57
355 400 0 –36 0 –57
400 450 0 –40 0 –63
450 500 0 –40 0 –63

Mounting tolerances for the housing bore

Nominal dimension
Da
Tolerance classes
mm
K6 K7
Upper deviation Lower deviation Upper deviation Lower deviation
μm μm μm μm
80 100 +4 –18 +10 –25
100 120 +4 –18 +10 –25
120 140 +4 –21 +12 –28
140 160 +4 –21 +12 –28
160 180 +4 –21 +12 –28
180 200 +5 –24 +13 –33
200 225 +5 –24 +13 –33
225 250 +5 –24 +13 –33
250 280 +5 –27 +16 –36
280 315 +5 –27 +16 –36
315 355 +7 –29 +17 –40
355 400 +7 –29 +17 –40
400 450 +8 –32 +18 –45
450 500 +8 –32 +18 –45
500 560 0 –44 0 –70
560 630 0 –44 0 –70

Location using clamping rings

clamping rings, INA crossed roller bearing seat depth, mounting dimensions
Clamping rings, bearing seat depth, mounting dimensions
1) Slots, threaded extraction hole or similar for dismounting purposes

For the location of crossed roller bearings SX, clamping rings have proved effective. The bearing rings must always be rigidly and uniformly supported over the circumference and width of the rings. The thickness of the clamping rings and mounting flanges must not be less than the minimum thickness s. Counterbores to DIN 74, type J, for screws to DIN 6912 are permissible. For deeper counterbores, the thickness of the clamping ring s must be increased by the additional counterbore depth.

INA crossed roller bearing seat depth

In order that the clamping rings retain the bearing securely, the bearing seat depth t must be in accordance with the specification, please see the table below.

The depth of the bearing seat influences the bearing clearanceand the rotational resistance. Bearings with preload  (suffix VSP) have a considerably higher rotational resistance.

If particular requirements for rotational resistance apply, the depth t must be produced to match the relevant height of the bearing ring. It has proved effective to tolerance the depth t to deviations that are the same as or further restricted compared to the dimension h in the product tables. For safety, internal tests should in any case be carried out.

Minimum strength of clamping rings

For screws of grade 10.9, the minimum strength under the screw heads or nuts must be 500 N/mm2. Seating washers are not necessary for these screws.

For fixing screws of grade 12.9, the minimum strength must not be less than 850 N/mm2, otherwise quenched and tempered seating washers under the screw heads or quenched and tempered nuts must be used.

Designation Mounting dimensions in mm
di Da t s dRa dRi DRi DRa Li La
h7
(h6)
K7
(K6)

min.

max.

min.
SX011814 70 90 10 –0,005–0,015 8 78 42 82 118 60 100
SX011818 90 115 13 –0,005–0,020 10 100 61 104 144 80 125
SX011820 100 125 13 –0,005–0,020 10 110 71 114 154 90 135
SX011824 120 150 16 –0,005–0,025 12 132 84 138 186 108 162
SX011828 140 175 18 –0,005–0,030 14 154 94 160 221 124 191
SX011832 160 200 20 –0,02–0,05 15 177 111 183 249 144 216
SX011836 180 225 22 –0,02–0,05 17 199 121 205 284 160 245
SX011840 200 250 24 –0,02–0,06 18 221 139 229 311 180 270
SX011848 240 300 28 –0,02–0,06 21 269 166 274 374 216 324
SX011860 300 380 38 –0,04–0,10 29 335 201 345 479 268 412
SX011868 340 420 38 –0,04–0,10 29 375 241 385 519 308 452
SX011880 400 500 46 –0,04–0,10 35 445 275 455 625 360 540
SX0118/500 500 620 56 –0,04–0,10 42 554 350 566 700 452 668

Fixing screws

For the location of the bearing rings or clamping rings, screws of grade 10.9 are suitable, please see the table below.

Fixing screws

Crossed roller bearings Fixing screws
Grade 10.9
Tightening torque
Dimension Quantity MA
Nm
SX011814 M5 18 7
SX011818 M5 24 7
SX011820 M5 24 7
SX011824 M6 24 11,7
SX011828 M8 24 27,8
SX011832 M8 24 27,8
SX011836 M10 24 55,6
SX011840 M10 24 55,6
SX011848 M12 24 98,4
SX011860 M16 24 247
SX011868 M16 24 247
SX011880 M20 24 481
SX0118/500 M24 24 831

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