Cross Roller Bearing
SX Series Cross Roller Bearing
SX series (outer ring split, inner ring rotating type) is similar to the RB series. The outer ring is a two-segmented structure connected by three fixed rings, and the inner ring is designed as one piece. This type has a smaller cross-section than the RB series in the same journal case. Due to the ultra-thin design, there are no mounting holes for the outer and inner rings, and flanges and supports are required for installation. It is suitable for places that require high rotation accuracy of the inner ring.
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SX series (outer ring split, inner ring rotating type) is similar to the RB series. The outer ring is a two-segmented structure connected by three fixed rings, and the inner ring is designed as one piece. This type has a smaller cross-section than the RB series in the same journal case. Due to the ultra-thin design, there are no mounting holes for the outer and inner rings, and flanges and supports are required for installation. It is suitable for places that require high rotation accuracy of the inner ring.
Bearing Parameters
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The parameter data of the SX series crossed roller bearingsÂ
| Type | Main dimensions |  basic load rating (axial) | Basic load rating (radial) | weight | |||||||
| Inner dia | Outer dia | Roller pitch | width | Greasing | r | Ca | Coa | Cr | Cor | Kg | |
| circle dia. | B B1 |  hole | kN | kN | kN | kN | |||||
| d | D | Dpw | S | ||||||||
| SX011814 | 70 | 90 | 80 | 10 | 1.2 | 0.6 | 18 | 60 | 12 | 30 | 0.3 |
| SX011818 | 90 | 115 | 102 | 13 | 1.2 | 1 | 26 | 96 | 17 | 47 | 0.4 |
| SX011820 | 100 | 125 | 112 | 13 | 1.2 | 1 | 28 | 106 | 18 | 52 | 0.5 |
| SX011824 | 120 | 150 | 135 | 16 | 1.5 | 1 | 41 | 153 | 26 | 75 | 0.8 |
| SX011828 | 140 | 175 | 157 | 18 | 1.5 | 1.1 | 64 | 237 | 41 | 116 | 1.1 |
| SX011832 | 160 | 200 | 180 | 20 | 1.5 | 1.1 | 69 | 272 | 44 | 133 | 1.7 |
| SX011836 | 180 | 225 | 202 | 22 | 2 | 1.1 | 98 | 381 | 63 | 187 | 2.3 |
| SX011840 | 200 | 250 | 225 | 24 | 2 | 1.5 | 106 | 425 | 68 | 208 | 3.1 |
| SX011848 | 240 | 300 | 270 | 28 | 2 | 2 | 149 | 612 | 95 | 300 | 5.3 |
| SX011860 | 300 | 380 | 340 | 38 | 2.5 | 2.1 | 245 | 1027 | 156 | 504 | 12 |
| SX011868 | 340 | 420 | 380 | 38 | 2.5 | 2.1 | 265 | 1148 | 167 | 563 | 13.5 |
| SX011880 | 400 | 500 | 450 | 46 | 2.5 | 2.5 | 385 | 1699 | 244 | 833 | 24 |
| SX0118/500 | 500 | 620 | 560 | 56 | 2.5 | 3 | 560 | 2538 | 355 | 1244 | 44 |
SX Series Crossed Roller Bearing Features
1. Sustain radial, axial, and moment loads simultaneously.
2. High rotation accuracy is ensured by adjusting the bearing clearance to preload.
3. Stable rotation
Applications
SX series cross roller bearings are especially suitable for limited space applications, while high rigidity and high rotation accuracy are required. Such as joints and swiveling units of industrial robots, machining center tables, rotary units of manipulators, precision rotary tables, medical equipment, measuring instruments, and IC manufacturing machines.
Installation instructions for cross roller bearing
The cross roller bearing should be mounted with the following steps:
1. Inspection before mounting the parts:
Wash and clean the bearing base or other mounting parts to remove the dirt and confirm that the burr on the parts has been removed.
2. Mount the bearing into the bearing base or onto the shaft. Because the thin-walled bearing may be mounted tilt, it should be leveled and mounted by beating it evenly with a plastic hammer in the circumferential direction until it is fully contacted with the contact surface can be confirmed with the sound.
3. Side pressing flange mounting
(1) Place the side pressing flange in place, and shake it back and forth several times in the circumferential direction to adjust the positions of the mounting bolts.
(2) Mount the pressing bolts. Tighten the bolts manually and ensure no deviation from the bolt holes.
(3) The pressing bolts can be tightened progressively and diagonally in 3~4 stages. Slightly rotate the integrated inner or outer ring to correct the two divided parts.
Notes in use of crossed roller bearings:
The two-divided imner or outer ring fixed with special rivets or bolts and nuts inseparable. and should be diectly mounted into the bearing base for use. Meanwhile. if the spacer holder assembling sequenceis improper ,it will have a significant impact on the rotation performance of the bearing.so,the bearing can not be disassembled freely. There is some deviation athe joint of inner or outer ring, before it is mounted into the bearing seat. The bolts to fix the imner or outer ring should be loosened to correct it with a plastic hammer. (the set rivets may be deformed with the bearing base deformation)Do not apply extermal force onto the set rivets orbolts during the mounting or removal.
Please note the size tolerances of the mounting parts, and press securely the inner or outer ring with the flange from the side.
Lubrication for crossed roller bearing:
The crossed roller bearing has been filled with high-quality two # lithium grease so it can be directly mounted for use. However, compared with standard roller bearings, it has a smaller internal space. so the grease must be replenished periodically.
The grease should be replenished from the grease hole connected to the grease groove on the outer and inner rings. The grease replenishment interval is generally 6-12 months. The same grease must be replenished in all areas.
Meantime, when the grease is filled fully, the initial rotation torque will be increased quickly due to the grease resistance; when the excess grease is spilled from the seal portions, it will soon be returned to the standard torque value.
