Cross Roller Bearing

XR Series Tapered Cross Roller Bearing

XR series cross tapered roller bearing is a crossed cylindrical roller bearing deformation. Its rolling elements are tapered rollers. The adjacent rollers are arranged in a 90-degree cross arrangement. The intersection of the extension line of the tapered roller rolling surface should be located on the rotation line of the bearing. Above, the characteristic of this bearing is that the rolling elements make pure rolling during the movement process to avoid relative sliding. Therefore, the limit speed is much higher than that of crossed cylindrical roller bearings, but the friction torque is lower than that of crossed cylindrical roller bearings.

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XR Series Tapered Cross Roller Bearing

XR series cross tapered roller bearing is a deformation of crossed cylindrical roller bearing. Its rolling elements are tapered rollers. The adjacent rollers are arranged in a 90-degree cross arrangement. The intersection of the extension line of the tapered roller rolling surface should be located on the rotation line of the bearing. Above, the characteristic of this bearing is that the rolling elements make pure rolling during the movement process to avoid relative sliding. Therefore, the limit speed is much higher than that of crossed cylindrical roller bearings, but the friction torque is lower than that of crossed cylindrical roller bearings.

Bearing Parameters

Type Inner diameter Outer diameter Height Chamfer Basic rated load(Radial) Basic rated load(Axial) Limit speed Weight
d D B r r/min KG
XR496051 203.2 279.4 31.75 1.5 51.3 61.6 800 6.5
XR678052 330.2 457.2 63.5 3.3 100 123 620 35
XR766051 457.2 609.6 63.5 3.3 141 178 520 51
XR820060 580 760 80 6.4 215 234 300 100
XR855053 685.8 914.4 79.375 3.3 270 344 260 150
XR882055 901.7 1117.6 82.55 3.3 300 396 200 185
XR889058 1028.7 1327.15 109.22 3.3 405 534 160 400
XR897051 1549.4 1828.8 101.6 3.3 518 699 80 500

XR Series Tapered Cross Roller Bearing Features:

1. High precision: precision can reach P4 and P2;

2. High rigidity: all bearings of this series have preload;

3. High load capacity: can bear axial load, radial load, and overturning load

4. High speed: the rolling elements make pure rolling during the movement, so the limit speed is higher than that of crossed cylindrical roller bearings.

5. Low friction: The friction torque is much lower than that of crossed cylindrical roller bearings.

XR Series Tapered Cross Roller Bearing Application:

Precision rotary indexing tables for machine tools, vertical and horizontal boring machines, vertical grinders, rotary surface grinders, large gear hobbing machines, guns and radar turrets, large radio and optical telescopes, rotating cameras, microscope tables, rod center pivots, Rotating bogies, welding brackets, large tanker mooring buoys, rotary assembly fixtures, industrial robots, precision rotating tables, medical equipment, measuring instruments, IC manufacturing devices, etc.

Selection of crossed roller bearing

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 great 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 fixed rivets may be deformed with the bearing base deformation)Do not apply any extermal force onto the fixed 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 2# lithium grease, so it can be directly mounted for use. However. compared with common roller bearings it has a smaller intemal 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 in a short ime due to the grease resistance;when the excess grease is spilled from the seal portions,it will soon be retumed to the normal torque value.