Specifications

CRBC50070 is used in locations where the rotation accuracy of the outer ring is required.used at Robotic arm

 

Thin section bearing|CRB50070/CRBC50070 crossed roller bearing|500*680*70mm|Robotic bearings |BYC slewing bearings

(Separable Outer Ring, Type for Inner Ring Rotation)

CRB series(Separable Inner Ring,Type for Outer Ring Rotation)

Its structure is that the inner ring is separable while the outer ring is integrated with the main body.without cage ,but full complement.this model is used in locations where the rotation accuracy of the outer ring is required.

CRBC series(Separable Inner Ring,Type for Outer Ring Rotation)

Its structure is that the inner ring is separable while the outer ring is integrated with the main body.with cage and full complement.this model is used in locations where the rotation accuracy of the outer ring is required.

 

 

shaft diameter (mm)	Identification  number		Main dimensions (mm)				Mounting  dimensions  (mm)		CRBC		CRB		Weight
	With cage	Full complement	d	D	B	(min)	da	Da	Basic  dynamic  load rating  C (KN)	Basic  static  load  rating  Co (KN)	Basic  dynamic  load  rating  C (KN)	Basic  static  load rating  Co (KN)	(Kg)
250	CRBC25025	CRB 25025	250	310	25	2.5	259	290	67.2	136	83.9	183	4.97
	CRBC 25030	CRB 25030	250	330	30	2.5	265	310	116	208	146	283	8.1
	CRBC 25040	CRB 25040	250	355	40	2.5	271	330	179	299	215	382	14.8
300	CRBC 30025	CRB 30025	300	360	25	2.5	310	341	73.8	162	91.9	217	5.88
	CRBC 30035	CRB 30035	300	395	35	2.5	318	372	163	299	205	408	13.4
	CRBC 30040	CRB 30040	300	405	40	2.5	321	381	194	351	235	451	17.2
400	CRBC 40035	CRB 40035	400	480	35	2.5	414	457	133	300	165	400	14.5
	CRBC 40040	CRB 40040	400	510	40	2.5	423	483	222	455	270	590	23.5
	CRBC 40070	CRB 40070	400	580	70	2.5	430	532	470	811	576	1060	72.4
500	CRBC50040	CRB 50040	500	600	40	2.5	517	573	211	497	259	648	26
	CRBC50050	CRB 50050	500	625	50	2.5	531	592	247	561	306	747	41.7
	CRBC50070	CRB 50070	500	680	70	2.5	530	633	536	1020	653	1330	86.1
600	CRBC 60040	CRB 60040	600	700	40	3	621	676	231	581	287	774	30.6
	CRBC 60070	CRB 60070	600	780	70	3	630	734	591	1230	700	1540	102
	CRBC600120	CRB 600120	600	870	120	3	643	817	1250	2210	1490	2800	274

 

Structure features of CRB50070/CRBC50070 crossed roller bearing:

With the Cross Roller bearing, 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 Crossed Roller bearing 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 CRB/CRBC series crossed roller bearing 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 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 outer rings, which are separable, are secured to CRB50070/CRBC50070 Cross Roller bearing 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 this type.

 

 

Example of installation for crossed roller bearings- CRB/CRBC50070 :

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