Sweeney Type Torque Wrench Calibrator. The Sweeney type torque wrench testers
used in your laboratory provide a simple positive means of testing the accuracy of
torque wrenches or other torquing devices.
The Army inventory includes Sweeney
type calibrators (testors). These testers are models 71, 73, and 75. The general
construction of the three models is the same. The difference in the three models
are found in the sizes of the instruments, the ranges covered by each, and the
scale divisions. Table 1 analyzes some of these differences.
Torque wrench tester specifications
a. Torque tester (models 71, 73, and 75) construction principle.
type torque testers are constructed of heat-treated aluminum alloy and alloy
They are equipped with machined leveling pads to facilitate installation
on walls, beams, or benches.
No springs are used in their construction.
primary moving part of each unit is a dead-weight pendulum accuated by a gear
segment and pinion mounted in life-sealed roller bearings. Torque applied to the
input transmits movement to the pendulum which, in turn, moves a stay-set indicator
over a combination scale calibrated in both foot-pounds and inch-pounds.
dimensions for the three models listed are as follows: