Preload预载
In aviation maintenance, preload is the controlled tension or clamping force applied to a fastener, bearing, or assembly during installation before external loads are introduced, often measured indirectly by torque or turn. It appears in maintenance manuals, overhaul procedures, torque specifications, and component installation sections as a critical assembly parameter with specified values that affect joint integrity, bearing life, and service reliability.
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Where this term appears
In translation, preload appears in component maintenance manuals, engine overhaul manuals, assembly task cards, and torque data tables. Translators must distinguish preload from torque, clamp-up force, and pre-tension, and ensure that value formats, lubricant instructions, measurement methods, and overhaul limits are not altered because small wording changes can affect assembly safety.
Translation checks
A frequent error is merging preload with torque and using the two terms interchangeably. Preload is the resulting clamp force, while torque is only one indirect way to achieve it. In overhaul instructions, this confusion can lead to incorrect tightening values, joint failure, or bearing damage, especially when lubrication changes the torque-preload relationship.
Keep the term aligned across your files
Check procedure sequence, part names, limits and cautions against the supplied references. Applicable aviation or market requirements depend on the product and project pathway.
Provide approved terms and previous translations with the source files. Agree how variants, ambiguous wording and revisions will be reviewed. Terminology maintenance and any termbase handback are confirmed in the project scope. See the 8-step AI + expert workflow.
Related document experience
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Read the published project →Published scope shows related industry experience; it does not confirm that this specific term was used or reviewed in the project.
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