Product Details

Taper crossed roller bearings

XR496051/616093A,

XR678052/615661A/PSL912-309A/300XRN50

XR766051/615894A/PSL912-308A/0457XRN060/XD.10.0457P5

XR820060/615662A/580XRN76/PSL912-304A/XD.10.0580P5

XR855053/615659A/0685XRN091/PSL912-305A/XD.10.0686P5

XR882055/615895A/0901XRN112/PSL912-306A/XD.10.0902P5

XR889058/ BFKB353282/H4A /1028XRN132/PSL912-307A/XD.10.1029P5

XR897051/615898A/XD.10.1549P5

JXR637050,JXR652050,JXR699050

More parameters

Model	Main dimension(mm)				Basic dynamic load rating		Limit speed (oil r/m)	Weight(kg)	Exchange model
Model	Inner diameter	Outer diameter	Width	Chamfer r(min)	Radial Cr(KN)	Axial Ca(KN)	Limit speed (oil r/m)	Weight(kg)	SKF	NACHI	URB	PSL
XR490651	203.2	279.4	31.75	1.5	51.2	61.4	800	6.5	616093A	-	-	-
XR678052	330.2	457.2	63.5	3	100	123	620	35	615661A	300XRN50	-	PSL912-309A
XR766051	457.2	609.6	63.5	3	141	178	520	51	615894A	0457XRN060	XD.10.0457P5	PSL912-308A
XR820060	580	760	80	5	215	234	300	100	615662A	580XRN76	XD.10.0580P5	PSL912-304A
XR855053	685.8	914.4	79.375	3	270	343	260	150	615659A	0685XRN091	XD.10.0686P5	PSL912-305A
XR882055	901.7	1117.6	82.55	3	300	395	200	185	615895A	0901XRN112	XD.10.0902P5	PSL912-306A
XR897051	1549.4	1828.8	101.6	3	516	698	80	500	615898A	-	XD.10.1549P5	-
JXR637050	300	400	37	1.5	63	80.1	720	13	-	-	-	-
JXR652050	310	425	45	2.5	82.2	102	640	20	-	-	-	-
JXR699050	370	495	50	3	93.6	119	600	30	-	-	-	-

Structure of Tapered Roller Bearings XR series
Precision crossed roller bearings (XR) are designed to offer the highest levels of rotational accuracy and rigidity while conserving space and saving material costs. The bearing features two sets of races and rollers brought together at right angles with alternate rollers facing in opposite directions. This allows two half-rows of rollers to fit into the space of one. The steep-angle, tapered geometry results in a total effective bearing spread much greater than the width of the bearing itself.
Able to withstand high overturning moments, the crossed roller bearing is ideal for the table bearing of machine tools, including vertical boring and grinding machines. It is uniquely suited to many other pivot and pedestal applications where space is limited or the lowest possible center of gravity of a rotating mass is required.
Size range:
ID 203.200 mm to 2463.800 mm (8.000 in. to 97.000 in.)
OD 279.400 mm to 2819.400 mm (11.000 in. to 111.000 in.)
Design Attributes:

Provides benefits of two-row bearings in single-row space.
Withstands high overturning moments.
Combines the compactness of a single-row bearing with the stability of a two-row bearing.

Product Application

Vertical boring mills
Vertical grinding machines
Other machine tools