preload

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preload

To bring in ahead of time. See buffering.
References in periodicals archive ?
The preload is measured by means of a quarter-bridge strain gauge in the shank of the bolt.
To account for preload variation from assembly influences, the transmitted friction forces in the interface are subtracted from the transverse force in each case.
As a first result, preload behavior under the defined load condition is compared in Fig.
When we observed unexpected ground cracking in the preload, we had to change our installation procedures, and reinforce the weaker zone with geofabric," he said.
The total preload height ranged front 22 to 28 feet.
The main bearing boxes must be modified to provide room for movement in the frame in a direction at right angles to the roll adjust mechanism; the arrangement for securing the boxes in the frame must allow the box to pivot slightly to follow the change of angle of the roll journal with respect to the calender end frame; the roll adjust mechanism must be modified to allow for lateral motion of the box with minimal friction; the roll adjust mechanism must also be modified to resist the lateral loads imposed as the roll is crossed; the crossing mechanism itself must be fitted to the calender frame; if preloads already exist, they must be modified to allow the bearing box to move with the roll.
This is accomplished by means of a short stroke hydraulic cylinder built into the roll adjust screw stack-up, in conjunction with preloads or pull backs and appropriate hydraulic controls.
This is also accomplished by means of hydraulic cylinders in the roll adjust screw stack-up, usually 1-1/2 to 2 inches in stroke, in conjunction with preloads or pull backs and appropriate controls.
Figure 2 schematically shows the characteristic torque and preload on a self threading screw as a function of the insertion time.
The tightening torque corresponds to a screw preload (clamp force), an important parameter that is a measure of the performance of the threaded joint.