Luoyang BoYing Bearing Co., Ltd.
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RB25025|250*310*25mm|RB25030|250*330*30mm crossed roller bearing

RB25025|250*310*25mm|RB25030|250*330*30mm Crossed Roller Bearing

Min. Order:
1 Piece
Payment term:
T/T
Delivery time:
7 days
Technical Parameters:
Product Designations:
RB25025
Structure:
cross roller bearings
Inside Diameter:
250 mm
Outside Diameter:
310 mm
Thickness:
25 mm
Weight:
5 KG
Brand:
BYC
Precision Rating:
P2/P4/P5
Bearing Material:
Gcr15 bearing steel
Seals Type:
two side seals
RB25025|250*310*25mm|RB25030|250*330*30mm Crossed Roller Bearing

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:

shaft diameter (mm)
Identifi -cation number
Main dimensions
Shoulder height
Basic load rating(radial)
weight
inner ring d (mm)
outer ring D(mm)
Roller pitch circle diameter dp(mm)
width B B1 (mm)
Greasing hole φ
Chamfer r(min)
ds
Dh
C kN
C0 kN
Kg
220
RB22025
220
280
250.1
25
2
2.5
235
265
92.3
171
4.1
 
240
 
RB24025
 
240
 
300
 
269
 
25
 
2
 
3
 
256
 
281
 
68.3
 
145
4.5
250
RB25025
250
310
277.5
25
2
3
265
290
69.3
150
5
RB25030
330
287.5
30
3
3
269
306
126
244
8.1
RB25040
355
300.7
40
3.5
3
275
326
195
348
14.8
300
RB30025
300
360
328
25
2
3
315
340
76.3
178
5.9
RB30035
395
345
35
3
3
322
368
183
367
13.4
RB30040
405
351.6
40
3.5
3
326
377
212
409
17.2

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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