Crossed roller bearing
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CROSSED ROLLER BEARING

THB's specialized technical services for various applications include

DESIGN SELECTION STATUS ANALYSIS AFTER SALES SERVICES Application analysis Performance Test Bearing application training To understand the difficulties in the transmission system； to prevent clients from potential problems in equipment design or operation. To use simulation software analysis and actual testing of the test machine to determine whether the bearings and its surrounding components could meet the requirements of the client (load, speed, temperature rise, noise and service life). To provide clients with professional training in product selection, application technologies,...

THBa bearing technical service engineer at the R&D center who simulates the client's equipment conditions with professional design software to give professional bearing selection and design optimization advices. THBa bearing application engineer with exten sive experience in equipment manufac tuning and operation sites, focusing on researching and solving bearing problems. THBa Chinese craftsman who provides clients with high quality products, focusing on bearing manufacturing processes and bearing quality control. THB is your technical advisor and business partner for various applications.

The crossed roller bearing is formed by arranging the appropriate rollers between the inner ring and the outer ring at 1:1. Its structure is compact and its rolling surfaces contact the rings at lines, so its rings and the rolling elements are less deformed when it is under pressure. It can bear the combined loads of the radial load, the axial load, the moment load, etc. at the same time. Such bearings are widely used in situations where high rigidity and high rotation accuracy are required and bearing size is small, such as the rotation positions of the industrial robots, the machine tools...

Major Features of Precision Crossed Roller Bearings of THB High Rigidity, High Positioning Accuracy and Smooth Rotation The rolling elements of the cylindrical rollers are arranged perpendicular (at 90°) to each other inside the crossed roller bearing. The roller elements contact the raceway at lines, and the rings and the rolling elements are less deformed when the bearing is under pressure, so the operation rigidity of the bearing is high when it is working. The cage or spacers can be placed between the rollers to prevent the rollers from slanting or rubbing with each other to increase...

Classification of Precision Crossed Roller Bearings of THB RB Type (Separable outer ring type for inner ring rotation) The RB series are the basic type of the crossed cylindrical roller bearings. The dimensions of their inner and outer rings are minimized. Their outer ring is two half rings fixed with bolts or special rivets, and their inner ring is a one-piece design. They are suitable for parts which require high rotation accuracy of the inner ring, such as the rotating parts of the indexing table of machine tools. SX Type (Separable outer ring type for inner ring rotation) The dimensions...

CRBS Type (Ultra-thin wall type, both inner ring and outer ring are integrated) The inner and outer rings of the CRBS series are both a one-piece design with a one-piece ring raceway. There is a filling hole in their outer ring. The thickness of their rings are as thin as close to the limit, so the weight of the mechanism is effectively reduced. As it is easy to mount them and as they are extremely thin, they are most suitable for the applications which require a high rigidity and high accuracy of the inner and outer rings. RA Type (Ultra-thin wall type, separable outer ring, integrated...

Precision level of Precision Crossed Roller Bearings of THB See the data listed below for the requirements for the rotation accuracy of the precision crossed roller bearings of the THB: Rotation Accuracy of Inner Ring of RB/CRBH Type Unit: μm Nominal dimension of inner diameter (d) of bearing (mm) Class Equal to P0 More or less than than Radial Runout Axial Runout Rotation Accuracy of Outer Ring of RE/CRBH Type Radial Runout Axial Runout

Rotation Accuracy of Inner/Outer Ring of RU Type Rotation Accuracy of Inner/Outer Ring of SX Type Note: As the outer ring is two half rings, its runout value is the value when the two half rings are fixed together. Please consult the THB if any accuracy higher than the listed values is required. Rotation Accuracy of Inner/Outer Ring of XV Type Note: Please consult the THB if accuracy higher than the listed values is required.

Rotation Accuracy of Inner Ring of CRBS/RA Type Rotation Accuracy of Outer Ring of CRBS/RA Type Unit: μm Nominal dimension of inner diameter of Radial/axial bearing runout (d) (mm) Equal to or More than Permissible value less than 40 65 13 65 80 15 80 100 15 100 120 20 Nominal dimension of inner diameter of bearing (d) (mm) More than 120 140 180 Radial/axial runout Equal to or less than 140 180 200 Unit: μm Nominal dimension of outer diameter of Radial/axial bearing runout (d) (mm) Equal to or More than Permissible value less than 65 80 13 80 100 15 100 120 15 120 140 20 Nominal dimension...

Unit: μm Dimensional Tolerance of Outer Diameter of RB/RE/CRBH Type Unit: μm Dimensional Tolerance of Inner and Outer Diameter of SX Type Note: Please consult the THB if accuracy higher than the listed values is required.

Unit: μm Dimensional Tolerance of Inner and Outer Diameter of XV Type Note: Please consult the THB if accuracy higher than the listed values is required. Unit: μm Tolerance of Width of Inner/outer Ring of RB/RE/CRBH Type Tolerance of B Applicable to the inner ring of the RB type and the outer ring of the RE type Tolerance of B1 Applicable to the outer ring of the RB type and the inner ring of the RE type Note: The tolerance of the width of the CRBS and RA is both -0.120~0mm. Please consult the THB if any accuracy higher than the listed values is required.

Unit: μm Tolerance of Width of SX Type Note: Please consult the THB if accuracy higher than the listed values is required. Unit: μm Tolerance of Width of XV Type Note: Please consult the THB if accuracy higher than the listed values is required.