RB25025|250*310*25mm|RB25030|250*330*30mm Crossed Roller Bearing
The RB25025 bearing is a Crossed Roller Bearing RB Series with an inner diameter of 250 mm , an outer diameter of 310 mm, a width of 25 mm. It typically uses P2/P4/P5 grade precision tolerances and two side seals type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
RB25025 crossed roller bearing|CNC bearings|250*310*25mm
RB25030 crossed roller bearing|CNC bearings|250*330*30mm
(Separable Outer Ring, Type for Inner Ring Rotation)
RB25025 RB25030 is the basic model of the Cross Roller Ring, despite the minimum possible dimensions of the inner and outer rings, its outer ring is separable while the inner ring is integrated with the main body. This model is used in locations where the rotation accuracy of the inner ring is required.
cross roller bearings RB25025 RB25030 ‘s detail information:
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shaft diameter (mm)
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Identifi -cation number
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Main dimensions
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Shoulder height
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Basic load rating(radial)
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weight
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|||||||
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inner ring d (mm)
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outer ring D(mm)
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Roller pitch circle diameter dp(mm)
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width B B1 (mm)
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Greasing hole φ
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Chamfer r(min)
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ds
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Dh
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C kN
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C0 kN
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Kg
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||
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220
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RB22025
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220
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280
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250.1
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25
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2
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2.5
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235
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265
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92.3
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171
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4.1
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|
240
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RB24025
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240
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300
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269
|
25
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2
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3
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256
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281
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68.3
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145
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4.5
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250
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RB25025
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250
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310
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277.5
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25
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2
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3
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265
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290
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69.3
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150
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5
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|
RB25030
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330
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287.5
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30
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3
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3
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269
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306
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126
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244
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8.1
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||
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RB25040
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355
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300.7
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40
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3.5
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3
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275
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326
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195
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348
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14.8
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||
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300
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RB30025
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300
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360
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328
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25
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2
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3
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315
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340
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76.3
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178
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5.9
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RB30035
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395
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345
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35
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3
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3
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322
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368
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183
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367
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13.4
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||
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RB30040
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405
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351.6
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40
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3.5
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3
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326
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377
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212
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409
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17.2
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RB25025 is the basic model of the Cross Roller Ring, despite the minimum possible dimensions of the inner and outer rings, its outer ring is separable while the inner ring is integrated with the main body. This model is used in locations where the rotation accuracy of the inner ring is required.
Structure features of RB25025
With the Cross Roller Ring, cylindrical rollers are arranged crosswise, with each roller perpendicular to the adjacent roller, in a 90°V groove, separated from each other by a spacer retainer. This design allows just one bearing to receive loads in all directions including, radial, axial and moment loads. Since the Cross-Roller Ring achieves high rigidity and the precision can reach up to P4.P2,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 equipment, measuring instruments and IC manufacturing machines.
Rotation accuracy
The spacer retainer fitting among RB25025 cross arrayed rollers prevents rollers from skewing and the rotation torque from increasing due to friction between rollers. Unlike conventional types using steel sheet retainers, the Cross- Roller Ring does not cause displacement or locking of rollers and provides a stable rotation torque. Since the inner and outer rings are designed to be separable, the bearing clearance can be adjusted. In addition, highly accurate rotary motion is ensured through adjusting the bearing clearance to provide a preload.
Usage characteristics
The inner and outer rings, which are separable, are secured to RB25025 Cross Roller Ring body after the rollers and spacer retainers are installed. This procedure prevents the rings from separating from each other. Thus, it is easy to handle the rings when installing the Cross-Roller Ring. The spacer retainer keeps rollers in their proper position,thereby preventing them from skewing. This eliminates friction between rollers, and therefore secures a stable rotation torque. the cross array of rollers allows a single RB25040 Cross Roller Ring unit to receive loads in all directions, increasing the rigidity to three to four times greater than the conventional type.
Our leading products are:
- High precision crossed roller bearing:SX series, XSU series, XU series; RB series, RU series, RE series, RA series;CRB series, CRBC series, CRBH series.
- High precision YRT rotary table bearing: YRT series, YRTS series, YRTM series, ZKLDF series.
- High precision crossed tapered roller bearing:XR series, JXR series.
- High precision cylindrical roller bearing thrust bearings.
- The precision rate has reached to P5/P4/P2,ranging from 50mm~1300mm.
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