Cross Roller Bearing

CRBF Series Cross Roller Bearing

CRBF series crossed roller bearing is crossed roller bearing with a compact inner & outer ring, so it has high stiffness, high loading capacity, and high rotation accuracy. CRBF series cross roller bearings can take radial/axial loads and tilting moments at the same time. And it’s with mounting holes on the inner and outer ring, so it’s easy to install, even without the mounting base or flange.

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CRBF series crossed roller bearing is crossed roller bearing with a compact inner & outer ring, so it has high stiffness, high loading capacity, and high rotation accuracy. CRBF series cross roller bearings can take radial/axial loads and tilting moments at the same time. And it’s with mounting holes on the inner and outer ring, so it’s easy to install, even without the mounting base or flange.

Bearing Parameters

Model Dimension (mm) Mounting (mm) Load Rating (kN) Mass
Open Type Sealed Type d D B rsmin PCD1 PCD2 Cr Cor kg
CRBF 108 AT CRBF 108 AT UU 10 52 8 0.3 16 42 2.91 2.43 0.12
CRBF 2012 AT CRBF 2012AT UU 20 70 12 0.3 28 57 7.6 8.37 0.31
CRBF 2512 AT CRBF 2512 AT UU 25 80 12 0.6 35 67 8.61 10.6 0.4
CRBF 3515 AT CRBF 3515 AT UU 35 95 15 0.6 45 83 17.3 20.9 0.66
CRBF 5515 AT CRBF 5515 AT UU 55 120 15 0.6 65 105 20.1 27.7 0.96
CRBF 8022 AT CRBF 8022 AT UU 80 165 22 0.6 97 148 51.1 72 2.63
CRBF 8022 A CRBF 8022 A UU 80 165 22 0.6 97 148 51.1 72 2.6
CRBF 8022 AD CRBF 8022 AD UU 80 165 22 0.6 97 148 51.1 72 2.6
CRBF9025AT CRBF9025AT UU 90 210 25 1.5 112 187 73.4 108 4.83
CRBF9025A CRBF9025A UU 90 210 25 1.5 112 187 73.4 108 4.67
CRBF9025AD CRBF9025AD UU 90 210 25 1.5 112 187 73.4 108 4.67
CRBF11528AT CRBF11528AT UU 115 240 28 1.5 139 217 84.3 138 6.81
CRBF11528A CRBF11528A UU 115 240 28 1.5 139 217 84.3 138 6.63
CRBF11528AD CRBF11528AD UU 115 240 28 1.5 139 217 84.3 138 6.63

What are the meanings of the suffix A/AD/AT/UU?

A: Mounting holes of both inner and outer rings are counterbore holes that face the same direction.

AD: Mounting holes of both inner and outer rings are counterbore holes facing opposite directions.

AT: Mounting holes of outer rings are counterbore holes, while mounting holes of inner rings are tapped holes.

UU: Sealed both sides.

Features of CRBF series crossed roller bearing:

CRBF series crossed roller bearings are some features of mounting holed type high rigidity. And have two types of designation: CRBF··A series (open style, with separator); CRBF··A UU series(sealed style, with division). A single structure is adopted to reduce mounting errors for inner and outer rings. Further, mounting holes are available for direct fixing on the mating mounting surface. So high rigidity and accuracy guide can be easily realized, less subject to the housing structure and precision. It can be easily mounted to a device with bolts without needing housing and a fixing plate, so surrounding parts of the bearing can be compact. Further, it allows reduces the number of factors and assembly processes, which contributes to miniaturization and weight saving of devices.

Applications

Joint units of robots, precision rotary tables, open rotating platforms, radar, precision measuring instruments, 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.