The crossed roller bearing is a special type of bearing with inner ring splitting and outer ring rotation. Since the divided inner ring or outer ring is fixed to the cross roller collar after being loaded into the roller and the spacer, to prevent separation from each other, the operation is simple when the cross roller collar is installed. Since the rollers are arranged in a cross arrangement, only one set of crossed roller collars can withstand loads in all directions, and the rigidity is increased by 3 to 4 times compared with the conventional model. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a two-divided structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained. Moreover, due to its special structure, it is commonly used as a joint bearing in industrial robots. Their rollers are arranged at right angles to each other at intervals between the inner and outer wheels. They can withstand loads from all directions (such as axial, thrust or momentum loads). Since the roller is in linear contact with the surface of the track, the bearing is less likely to be elastically deformed by the load. This type of bearing is widely used in industrial robots, work machines and medical facilities, where high rigidity, tightness and high speed are required to ensure accuracy. In the cross-roller bearing, since the cylindrical rollers are vertically aligned with each other by the spacer, one cross roller bearing can withstand loads in all directions such as radial load, axial load, and moment load. The size of the inner and outer rings is minimized, and the extremely thin type is a small size close to the limit and has high rigidity, so it is most suitable for the joint portion or the rotating portion of the industrial robot, the rotary table of the machining center, Uses such as robot rotating parts, precision rotary tables, medical equipment, gauges, IC manufacturing equipment, etc.
Use characteristics
Cross-roller bearings, because of the divided inner or outer ring, are attached to the roller and spacer after the roller and spacer are installed to prevent separation from each other, so when installing the cross roller collar simple. Since the rollers are arranged in a cross arrangement, only one set of crossed roller collars can withstand loads in all directions, and the rigidity is increased by 3 to 4 times compared with the conventional model. At the same time, since the inner ring or the outer ring of the crossed roller bearing has a two-divided structure, the bearing clearance can be adjusted, and even if a preload is applied, a high-precision rotational motion can be obtained.
Introduction to crossed cylindrical roller bearings
Crossed roller bearings are composed of two major types, one is a crossed cylindrical roller bearing and the other is a crossed tapered roller bearing; the crossed roller bearing has a long history of application abroad, but it is only recently in China. It has only entered the public's horizon for a few years, and is widely used because of its particularity and superiority with other bearings.
main feature :
1. Excellent rotation precision. The internal structure of the crossed roller bearing adopts rollers 90° perpendicular to each other (this is also the name of the crossed roller bearing). The roller is equipped with spacers or spacers. Preventing the roller rollers from tilting each other, effectively preventing the increase of the rotational torque. This cross cylindrical roller bearing has been included in the fast and easy to use, in addition, there will be no contact or locking phenomenon of the roller; at the same time, because the inner and outer rings of the standard cross roller bearing are divided structures, the clearance can be adjusted even if By applying pressure, high-precision rotary motion can also be obtained.
2. Operation and installation The simplified standard cross-roller bearing is divided into two parts of the outer ring or the inner ring. After the roller and the retainer are installed, they are fixed together. The mounting bolts and the fixing flange can be finely adjusted during installation. The ideal load condition is achieved, so the installation is very simple.
3. Affecting large axial and radial loads. Because the rollers are vertically aligned with each other through the spacers on the 90° V-groove rolling surface, this design allows the crossed roller bearings to withstand large Loads in all directions, such as radial load, axial load and moment load.
4. Significant savings in installation space The size of the inner and outer rings of the cross roller bearing is minimized. In particular, the ultra-thin structure is a small size close to the limit and has high rigidity, so it is most suitable for joints or rotating parts of industrial robots. The rotary table, the robot rotating part, the precision rotary table, the medical instrument, the measuring instrument, and the IC manufacturing device of the machining center are widely used.
Introduction to Cross Tapered Roller Bearings
The XR series of cross-tapered roller bearings are designed to provide high rotational accuracy and stiffness in a small space, resulting in significant material cost savings. This type of bearing is to install two sets of bearing races and rollers at right angles. The adjacent rollers are facing in opposite directions. The spacers are installed between the rollers and the rollers. The rollers are also equipped with support spacers. This allows the two halves of the roller to fit into the same space. The angle and tapered geometry of the bearing allows the effective span of the bearing to be several times larger than the actual width of the bearing itself.
XR series bearings are suitable for high speed machine tools such as vertical boring machines and vertical grinding machines. It is also especially suitable for many devices with limited space and high rotation accuracy.
Size range
2463.800 mm (4.000 in. to 97.000 in.)
2819.400 mm (11.000 in. to 111.000 in.)
Design characteristics
The XR series has two rows of tapered rollers that are vertically aligned by a spacer on a V-shaped hob surface of 90°, and can withstand loads in all directions such as radial load and axial load. Line contact on the raceway and roller construction provides maximum rotational accuracy, high stability and greater tilt stiffness. The preloaded adjustable design extends bearing life, maximizing stiffness and providing minimum runout. The nylon spacer has a low inertia and a small running torque. The parts are made of surface carburized steel or electroslag remelted bearing steel with good impact resistance.
Application range
Precision rotary indexing tables for machine tools, vertical and horizontal boring machines, vertical grinders, rotary surface grinders, large hobbing machines, guns and radar turrets, large radio and optical telescopes, rotary cameras, steering pivots and continuous casting machines, Highly constrained pivot microscope stage, rod center support shaft, rotary bogie, welding bracket, rotary assembly fixture, industrial robot, precision rotary table, medical equipment, measuring instruments, IC manufacturing equipment
model
The THK cross roller bearing RB series models are as follows:
RB7013 RB8016 RB9016 RB10016 RB10020 RB11012 RB11015 RB11020 RB12016 RB12025 RB13015 RB13025 RB14016 RB14025 RB15013 RB15025 RB15030 RB16025 RB17020 RB18025 RB19025 RB20025 RB20030 RB20035 RB22025 RB24025 RB25025 RB25030 RB25040 RB30025 RB30035 RB30040 RB35020 RB40035 RB40040 RB45025 RB50025 RB50040 RB50050 RB60040 RB70045 RB80070 RB90070 RB1000110 RB1250110
The INA cross roller bearing SX series models are as follows:
SX011814 SX011818 SX011820 SX011824 SX011828 SX011832 SX011836 SX011840 SX011848 SX011860 SX011868 SX011860 SX0118/500
The INA cross roller bearing XSU series models are as follows:
XSU080168 XSU080188 XSU080218 XSU080258 XSU080318 XSU080398 XSU140414 XSU140544 XSU140644 XSU140744 XSU140844 XSU140944
The THK cross roller bearing RA series models are as follows:
RA10008 RA11008 RA12008 RA13008 RA14008 RA15008 RA16013 RA17013 RA18013 RA19013 RA20013
The THK cross roller bearing RE series models are as follows:
RE7013 RE8016 RE9016 RE10016 RE10020 RE11012 RE11015 RE11020 RE12016 RE12025 RE13015 RE13025 RE14016 RE14025 RE15013 RE15025 RE15030 RE16025 RE17020 RE18025 RE19025 RE20025 RE20030 RE20035 RE22025 RE24025 RE25025 RE25030 RE25040 RE30025 RE30035 RE30040 RE35020 RE35025 RE40035 RE40040 RE45025 RE50025 RE50040 RE50050 RE60040
The THK cross roller bearing RU series models are as follows:
RU124G RU148G RU178G RU228 RU297 RU445 RU228X RU297X RU445X RU228G RU297G RU445G
The IKO cross roller bearing CRB series models are as follows:
CRB8016 CRB9016 CRB10016 CRB10020 CRB11012 CRB11015 CRB11020 CRB12016 CRB12025 CRB13015 CRB13025 CRB14016 CRB14025 CRB15013 CRB15025 CRB15030 CRB16025 CRB17020 CRB18025 CRB19025 CRB20025 CRB20030 CRB20035 CRB22025 CRB24025 CRB25025 CRB25030 CRB25040 CRB30025 CRB30035 CRB30040 CRB35020 CRB40035 CRB40040 CRB40070 CRB45025 CRB50025 CRB50040 CRB50050 CRB50070 CRB60040 CRB60070 CRB600120 CRB70045 CRB70070 CRB700150 CRB80070 CRB800100