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Crossed roller bearing XRT400-NF
Crossed roller bearing XRT400-NF
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  • Crossed roller bearing
  • 1028.7 mm
  • 1327.15 mm
  • 114.3 mm

The above is for reference only, and the actual parameters are subject to material.

Crossed roller bearing

Product Display / Details

Model Number SRA5008
Inner Diameter 50mm
Outer Diameter 66mm
Width 8mm
Basic Rated Loading C 5.1kN
Basic Rated Loading C0 7.19kN
Weight 0.08kg
Equivalent THK / RA5008
IKO / CRBS508
Quality standard ISO9001:2000 ; ISO9001:2008
Brand Name TBB or OEM (as per customer's need)

Structure and Characteristics

With the cross-roller ring and compact structure, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller in a 90°V groove, are separated from each other by spacer or cage. This design allows just one bearing to hold loads from all directions including radial, axial and moment loads.
Cross roller bearings can be manufactured in various structures with spacer, cage or full complement. The cross roller bearings with spacer or cage are suitable for high speed and low friction applications while full complement cross roller bearings for low speed and heavy load.

Since the cross roller bearings achieve high rigidity despite the minimum possible dimensions of the inner and outer rings, it is optimal for applications, such as joints and swiveling units of industrial robots, swiveling tables of machining centers, rotary units of manipulators, precision rotary tables, medical equipments, measuring instruments and IC manufacturing machines.

• High Rotation Accuracy

• Easy Handling

• Skewing Prevention

• Significant Increased Rigidity

Types and Features

SRA Thin type
(Separable outer ring for inner ring rotation)
SRA series are small, light and compact
bearings with the thinnest possible inner and
outer rings. It is the best choice for locations
where space saving, weight reduction and
downsizes are required, such as hands of
robots and manipulators or other swiveling units. The outer ring of SRA is separable and fixed by special rivets after installation.
SRB/SRBC/SRBH Standard Type
(Separable outer ring for rotation inner ring)
SRB/SRBC/SRBH series are standard types with outer and inner rings as small as possible. it's outer ring is separable while the inner ring is designed to be integrated with the main body. This type is very suitable for the locations where high rotation accuracy of inner ring is required,such as index table swiveling unit of machine tool.
SRE Standard Type
(Rotation outer ring)
Based on and improved form SRB,model SRE has the same major dimensions as model SRB and is widely used in the locations where the rotation accuracy of the outer ring is required.
SRC Standard Type
(Separable outer ring for rotation inner ring)
SRC series are similar to SRB series. The two separable outer rings are connected by cirlips.
SRT Standard Type SRT series are similar to SRB and SRE in structure and design. SRT tapered cross roller bearing,with tapered roller cross-arranged and spaced by retainer in V groove, has two separable outer ring or inner ring. Compared with cylindrical cross roller bearing, this design allows on bearing to uphold heavier load. The features of this type are high rotation accuracy, high speed and excellent stability.
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