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Cantilevered Cutaway

Double Ended Pivot Bearing Cutaway

 

  

Double-Ended Pivot Bearings

These pivots carry higher radial loads than cantilevered pivot bearings and are mounted with both ends attached or supported allowing the center portion to rotate. General double ended pivot bearing applications include weigh stations, u-joints, seismometers, and various linkages.

The load capacities shown below represent maximum allowable forces in any single direction. If the intended application has multi-directional loading, such as combined axial and radial loads, bending moments, extreme temperatures, or will be subjected to vibration or shock loads please consult our engineering staff for assistance.

Pivot Characteristics Chart
Use the Pivot Characteristics Chart below in combination with our life cycle curves to determine the proper pivot for your application.

Nominal
Outside
Diameter
 
(Inch)
 
D
 
+0.0000
-0.0005
Torsional
Spring
Rate
 
(in-lb)
(Degree)
 
See Note 2
Radial Load
Capacity
(Pounds)
 
Load at Center
of "C"
 
See Note 1
Axial
Load
Capacity
(Pounds)
Double-Ended Pivot Bearings
Catalog
Number
Vc
Vt
Pa
L
±0.003
E
±0.005
C
+0.005
-0.015
Series 6000
 
Double-Ended
0.1250
0.0140
28.0
28.0
24.5
0.200
0.045
0.085
6004-400
0.0017
17.7
25.0
12.3
6004-600
0.0002
2.2
4.7
5.9
6004-800
0.1562
0.0279
44.0
44.0
38.7
0.250
0.057
0.110
6005-400
0.0035
27.6
39.0
19.4
6005-600
0.0004
3.5
7.4
9.7
6005-800
0.1875
0.0473
63.0
63.0
56.4
0.300
0.067
0.130
6006-400
0.0057
39.6
56.0
27.9
6006-600
0.0007
4.9
9.0
13.9
6006-800
0.2500
0.1141
113.0
113.0
99.0
0.400
0.090
0.175
6008-400
0.0143
70.7
100.0
49.4
6008-600
0.0018
8.5
19.0
24.7
6008-800
0.3125
0.2234
176.0
176.0
154.0
0.500
0.112
0.220
6010-400
0.0286
110.0
156.0
77.5
6010-600
0.0036
14.0
29.0
38.8
6010-800
0.3750
0.3840
253.0
253.0
223.0
0.600
0.135
0.265
6012-400
0.0480
159.0
225.0
112.0
6012-600
0.0058
19.8
42.0
55.4
6012-800
0.5000
0.9080
450.0
450.0
392.0
0.800
0.180
0.355
6016-400
0.1134
283.0
400.0
196.0
6016-600
0.0142
35.4
75.0
98.0
6016-800
0.6250
1.8500
703.0
703.0
615.0
1.000
0.225
0.445
6020-400
0.2321
442.0
625.0
308.0
6020-600
0.0295
55.0
117.0
155.0
6020-800
0.7500
3.1800
1013.0
1013.0
884.0
1.200
0.270
0.535
6024-400
0.3980
363.0
900.0
442.0
6024-600
0.0500
78.0
169.0
221.0
6024-800
1.0000
7.5200
1800.0
1800.0
1570.0
1.600
0.370
0.735
6032-400
0.9390
1131.0
1600.0
785.0
6032-600
0.1175
141.0
300.0
392.0
6032-800
Notes:
  1. Pounds at zero deflection based on pure radial load. Performance of pivot is a function of number of cycles, angular travel, and loading. Must use life cycle curves for selection of the proper pivot. When the load is applied directly through a single spring, multiply capacity by 0.707.
  2. At zero load, Torsional Spring Rate may change with radial load.

Standard Material
The pivot body is AISI 410 or 420 corrosion-resistant steel and the flexing elements are AISI 420 corrosion resistant steel. These pivots utilize brazed construction consisting of a silver/copper and nickel filler material.

Torsional Spring Rate
The spring rates are usually within ±10% or less of the tabulated values above. However, the tolerances can be much larger for spring rate values below .0018 in-lb/deg. Contact our engineering staff if closer tolerances or actual values are required.

Welded Construction
For applications where the braze alloy presents a problem, electron beam welded construction is available. If welded construction is desired please contact our engineering staff for assistance.

Tighter Diameter Tolerance
For applications where a tighter diameter tolerance is required, +0.0000/-0.0002, specify "T2" after the catalog number. If other tolerance variations are desired please contact our engineering staff for assistance.