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Trailer rings - Series U

Trailer rings are used for trailer axle articulation, simple turntables, assembly or welding jigs.

Trailer rings are not precision bearings! They are formed by bending a steel section into a circle with a raceway rolled in. As a result the diameter tolerances are very large in comparison to slewing ring bearings - typically dia +/- 3 - 5mm or more in some cases.  

These are light duty flanged bearings and suited only to concentric, applied loads with limited oscillation. They are not suited to applications in which high moment loads or continuous rotation occur.

Trailer rings should be mounted on flat surfaces with at least 50% of the ring circumference supported. Plates welded to the frame can be used to transmit radial forces and relieve load on the bolts (Grade 8.8 or 10.9), minimum diameter 16mm. (See more technical information here)

Dimensions

NBC stock code
Dimensions
Grease points
Ball f
Mass
Thrust
H
A
B
C
D
 
 
load
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(kg)
(ton)
 
U01L030
55
298
293
220
200
1
12
5
0.5
U01L040
55
400
400
320
300
1
12
8
0.75
U01L050
55
500
500
420
400
1
12
10
1
 
 
 
 
 
 
 
 
 
 
U01N060
65
600
600
516
490
2
14
18
1.7
U01N065
65
650
650
568
543
2
14
20
1.7
U01N070
65
700
700
620
594
2
14
22
2.2
U01N075
65
750
750
668
640
2
14
24
2.2
U01N080
65
800
800
718
690
2
14
26
2.5
U01N085
65
850
850
767
742
2
14
28
3
U01N090
65
900
900
820
793
2
14
30
3.5
U01N095
65
950
950
870
843
2
14
31
3.5
U01N100
65
1000
1000
920
895
2
14
33
4
U01N105
65
1050
1050
970
945
2
14
35
4.5
U01N110
65
1100
1100
1010
988
 
14
40
4.5
 
 
 
 
 
 
 
 
 
 
U01P090
80
890
895
795
766
2
16
36
5
U01P100
80
1010
1015
916
888
2
16
42
6
U01P110
80
1100
1105
1005
976
2
16
45
6.5
 
 
 
 
 
 
 
 
 
 
U01T100
90
1000
1008
889
856
2
20
60
8
U01T110
90
1100
1100
980
948
2
20
65
10

Interchange information

The table below lists generally accepted interchange information. Please be aware that the heights of trailer rings can vary considerably - these are not precise units. In practice a small section height variance can usually be accomodated.

NBC stock ref
RIMA
Torriani
Towtrax
U01L030
20101
U.300.12
TT0298/55
U01L040
20102
U.400.12
TT0400/55
U01L050
20103
U.500.12
TT0500/55
U01N060
20104
U.600.14
TT0600/65
U01N065
20105
U.650.14
TT0650/65
U01N070
20106
U.700.14
TT0700/65
U01N075
20107
U.750.14
TT0750/65
U01N080
20108
U.800.14
TT0800/65
U01N085
20109
U.850.14
TT0850/65
U01N090
20110
U.900.14
TT0900/65
U01N095
20111
U.950.14
TT0950/65
U01N100
20112
U.1000.14
TT1000/65
U01N105
20113
U.1050.14
TT1050/65
 
20114
U.1100.14
 
U01P090
20116
 
TT0895/80
U01P100
20117
 
TT1000/80
U01P110
20118
 
TT1100/80
U01T100
 
 
TT1000/90
U01T110
 
 
TT1100/90

Need help?

Should you require assistance in selecting the right product  phone our slewing ring experts on 01952 222300 or e-mail slewingrings@nbcgroup.co.uk

Whilst every effort has been made to ensure the accuracy of the information on this website, if you spot a mistake please inform the webmaster@nbcgroup.co.uk. Thanks!