Cross Roller Bearing

CRBH Series Cross Roller Bearing

CRBH series crossed roller bearings (Integrated Inner and Outer Rings, Ultra-thin), this model is an ultra-thin RU series bearing; due to the ultra-thin design and no mounting holes in the outer ring and inner ring, The flange and the support base are required to be fixed during installation. In addition, since the outer ring and the inner ring are of integral structure, the facility does not affect performance, so stable rotation accuracy and torque can be obtained, which is suitable for occasions where the outer ring and the inner ring rotate but the size and miniaturization are required.

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CRBH series crossed roller bearings (Integrated Inner and Outer Rings, Ultra-thin), this model is an ultra-thin RU series bearing; due to the ultra-thin design and no mounting holes in the outer ring and inner ring, The flange and the support base are required to be fixed during installation. In addition, since the outer ring and the inner ring are of integral structure, the facility does not affect performance, so stable rotation accuracy and torque can be obtained, which is suitable for occasions where the outer ring and the inner ring rotate but the size and miniaturization are required.

Bearing Parameters

Standard models of CRBH series crossed roller bearing:

Model Dimension (mm) Mounting (mm) Load Rating (kN) Weight
Open Type Sealed Type d D B da Da C C0 kg
CRBH208A CRBH208AUU 20 36 8 24 31 2.91 2.43 0.04
CRBH258A CRBH258AUU 25 41 8 29 36 3.12 2.81 0.05
CRBH3010A CRBH3010AUU 30 55 10 36.5 48.5 7.6 8.37 0.12
CRBH3510A CRBH3510AUU 35 60 10 41.5 53.5 7.9 9.13 0.13
CRBH4010A CRBH4010AUU 40 65 10 46.5 58.5 8.61 10.6 0.15
CRBH4510A CRBH4510AUU 45 70 10 51.5 63.5 8.86 11.3 0.16
CRBH5013A CRBH5013AUU 50 80 13 56 74 17.3 20.9 0.29
CRBH6013A CRBH6013AUU 60 90 13 66 84 18.8 24.3 0.33
CRBH7013A CRBH7013AUU 70 100 13 76 94 20.1 27.7 0.38
CRBH8016A CRBH8016AUU 80 120 16 88 112 32.1 43.4 0.74
CRBH9016A CRBH9016AUU 90 130 16 98 122 33.1 46.8 0.81
CRBH10020A CRBH10020AUU 100 150 20 110 140 50.9 72.2 1.45
CRBH11020A CRBH11020AUU 110 160 20 120 150 52.4 77.4 1.56
CRBH12025A CRBH12025AUU 120 180 25 132 168 73.4 108 2.62
CRBH13025A CRBH13025AUU 130 190 25 142 178 75.9 115 2.82
CRBH14025A CRBH14025AUU 140 200 25 152 188 81.9 130 2.96
CRBH15025A CRBH15025AUU 150 210 25 162 198 84.3 138 3.16
CRBH20025A CRBH20025AUU 200 260 25 212 248 92.3 169 4
CRBH25025A CRBH25025AUU 250 310 25 262 298 102 207 4.97
CRBH30025A CRBH30025AUU 300 360 25 312 348 112 245 5.29

CRBH Series Crossed Roller Bearing Features

1. Sustain radial, axial, and moment loads

2. High rigidity & running accuracy, being less subject to the mounting procedure

3. Thin section type

The Application of CRBH Series Crossed Roller Bearing

CRBH series crossed roller bearings are mainly used for rotation part of the machine tools, CNC rotary tables, medical equipment, aviation equipment, precision turntable, etc.

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.