Double-Ended
Pivot Bearings
Double-Ended Free-Flex® 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 linkage systems.
Features
Standard Material
Standard pivots are brazed construction and consist of an AISI 410 corrosion-resistant steel body with AISI 420 flexures.
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
Electron beam welded pivots are available for applications with high applied loads and low rotational angles. Please contact Riverhawk engineering for assistance or further information.
Tighter Diameter Tolerance
For applications where a tighter diameter tolerance is required, +0.0000/-0.0002 inches, specify “T2” after the catalog number. If other tolerance variations are desired please contact our engineering staff for assistance.
Characteristics chart
Radial load capacities noted below correspond to vertical radial loads resulting in compression (Vc) or tension (Vt) of the flexures, as depicted below.
Use the Pivot Characteristics Chart PDF in combination with our life cycle curves to determine the proper pivot for your application:
| Nominal Outside Diameter (Inch) D +0.0000-0.0005 | Catalog Number | Load Capacity – (Pounds) Load At Center of “C” |  | Torsional Spring Rate See Note (2) in – lb Degree | Maximum Axial Load (lbs.) | |||
| See Note (1) | ||||||||
| Series 6000 Double Ended (size-type) | Vc  | Vt  | L ±0.003 | B ±0.005 | C +0.005 -0.015 | |||
| 0.1250 | 6004-400 | 28.0 | 28.0 | 0.200 | 0.045 | 0.085 | 0.0140 | 24 |
| 6004-600 | 17.7 | 25.0 | 0.0017 | 12 | ||||
| 6004-800 | 2.2 | 4.7 | 0.0002 | 5.8 | ||||
| 0.1562 | 6005-400 | 44.0 | 44.0 | 0.250 | 0.057 | 0.110 | 0.0279 | 38 |
| 6005-600 | 27.6 | 39.0 | 0.0035 | 19 | ||||
| 6005-800 | 3.5 | 7.4 | 0.0004 | 9.6 | ||||
| 0.1875 | 6006-400 | 63.0 | 63.0 | 0.300 | 0.067 | 0.130 | 0.0473 | 56 |
| 6006-600 | 39.6 | 56.0 | 0.0057 | 27 | ||||
| 6006-800 | 4.9 | 9.0 | 0.0007 | 14 | ||||
| 0.2500 | 6008-400 | 113.0 | 113.0 | 0.400 | 0.090 | 0.175 | 0.1141 | 98 |
| 6008-600 | 70.7 | 100.0 | 0.0143 | 49 | ||||
| 6008-800 | 8.5 | 19.0 | 0.0018 | 25 | ||||
| 0.3125 | 6010-400 | 176.0 | 176.0 | 0.500 | 0.112 | 0.220 | 0.2234 | 152 |
| 6010-600 | 110.0 | 156.0 | 0.0286 | 76 | ||||
| 6010-800 | 14.0 | 29.0 | 0.0036 | 38 | ||||
| 0.3750 | 6012-400 | 253.0 | 253.0 | 0.600 | 0.135 | 0.265 | 0.3840 | 222 |
| 6012-600 | 159.0 | 225.0 | 0.0480 | 111 | ||||
| 6012-800 | 19.8 | 42.0 | 0.0058 | 55 | ||||
| 0.5000 | 6016-400 | 450.0 | 450.0 | 0.800 | 0.180 | 0.355 | 0.9080 | 392 |
| 6016-600 | 283.0 | 400.0 | 0.1134 | 196 | ||||
| 6016-800 | 35.4 | 75.0 | 0.0142 | 98 | ||||
| 0.6250 | 6020-400 | 703.0 | 703.0 | 1.000 | 0.225 | 0.445 | 1.8500 | 612 |
| 6020-600 | 442.0 | 625.0 | 0.2321 | 306 | ||||
| 6020-800 | 55.0 | 117.0 | 0.0295 | 154 | ||||
| 0.7500 | 6024-400 | 1013.0 | 1013.0 | 1.200 | 0.270 | 0.535 | 3.1800 | 884 |
| 6024-600 | 636.0 | 900.0 | 0.3980 | 442 | ||||
| 6024-800 | 78.0 | 169.0 | 0.0500 | 221 | ||||
| 1.0000 | 6032-400 | 1800.0 | 1800.0 | 1.600 | 0.370 | 0.735 | 7.5200 | 1570 |
| 6032-600 | 1131.0 | 1600.0 | 0.9390 | 785 | ||||
| 6032-800 | 141.0 | 300.0 | 0.1175 | 392 | ||||
| Nominal Outside Diameter (mm) D 0 – -0.0127 | Catalog Number | Load Capacity – N (1) Load At Center of “C” | | Torsional Spring Rate See Note (2) N – mm Degree | |||
| See Note (1) | |||||||
| Series 6000 Double Ended (size-type) | Vc | Vt | L ±0.0762 | B ±0.127 | C +0.127 -0.381 | ||
| 3.175 | 6004-400 | 124.6 | 124.6 | 5.08 | 1.143 | 2.159 | 1.58 |
| 6004-600 | 78.7 | 111.2 | 0.19 | ||||
| 6004-800 | 9.8 | 20.9 | 0.02 | ||||
| 3.96748 | 6005-400 | 195.7 | 195.7 | 6.35 | 1.4478 | 2.794 | 3.15 |
| 6005-600 | 122.8 | 173.5 | 0.40 | ||||
| 6005-800 | 15.6 | 32.9 | 0.05 | ||||
| 4.7625 | 6006-400 | 280.2 | 280.2 | 7.62 | 1.7018 | 3.302 | 5.34 |
| 6006-600 | 176.1 | 249.1 | 0.64 | ||||
| 6006-800 | 21.8 | 40.0 | 0.08 | ||||
| 6.35 | 6008-400 | 502.6 | 502.6 | 10.16 | 2.286 | 4.445 | 12.89 |
| 6008-600 | 314.5 | 444.8 | 1.62 | ||||
| 6008-800 | 37.8 | 84.5 | 0.20 | ||||
| 7.9375 | 6010-400 | 782.9 | 782.9 | 12.7 | 2.8448 | 5.588 | 25.24 |
| 6010-600 | 489.3 | 693.9 | 3.23 | ||||
| 6010-800 | 62.3 | 129.0 | 0.41 | ||||
| 9.525 | 6012-400 | 1125.4 | 1125.4 | 15.24 | 3.429 | 6.731 | 43.39 |
| 6012-600 | 707.3 | 1000.8 | 5.42 | ||||
| 6012-800 | 88.1 | 186.8 | 0.66 | ||||
| 12.7 | 6016-400 | 2001.7 | 2001.7 | 20.32 | 4.572 | 9.017 | 102.59 |
| 6016-600 | 1258.8 | 1779.3 | 12.81 | ||||
| 6016-800 | 157.5 | 333.6 | 1.60 | ||||
| 15.875 | 6020-400 | 3127.1 | 3127.1 | 25.4 | 5.715 | 11.303 | 209.02 |
| 6020-600 | 1966.1 | 2780.1 | 26.22 | ||||
| 6020-800 | 244.7 | 520.4 | 3.33 | ||||
| 19.05 | 6024-400 | 4506.0 | 4506.0 | 30.48 | 6.858 | 13.589 | 359.29 |
| 6024-600 | 2829.1 | 4003.4 | 44.97 | ||||
| 6024-800 | 347.0 | 751.7 | 5.65 | ||||
| 25.4 | 6032-400 | 8006.8 | 8006.8 | 40.64 | 9.398 | 18.669 | 849.64 |
| 6032-600 | 5030.9 | 7117.1 | 106.09 | ||||
| 6032-800 | 627.2 | 1334.5 | 13.28 | ||||
- Pounds at zero deflection based on pure radial load. When the load is applied directly through a single spring, multiply capacity by 0.707. Pivot orientated such that a radial load puts flexures in Compression (Vc) or Tension (Vt).
- At zero load.
To learn more about Riverhawk’s Double-Ended Pivot Bearings, please contact a member of our team. We are happy to assist you with your project needs.
COMPRESSION LOADING LIFE CYCLE CURVES
TENSION LOADING LIFE CYCLE CURVES
