Product Supply Code: NLAB-TECHNICALAB30025
Product Name: Study Of A Pre Tensioned Bolt
Tender Supply Category: Mechanical Lab Instruments
The apparatus allows the following experiments:
Deformations in a bolt after tightening with a spanner or with a torque wrench.
Effect of bolt pre-tensioning using a hydraulic loading system.
Effect of varying the loading position.
Effect of varying the materials on the loading torque.
Static analysis of sliding with friction on a helical screw contact surface or plane.
Simple loading and stresses on a plane section.
Mohr’s Circles of stress, principal stresses and their directions.
Technical specifications
The pre-loaded bolt assembly is composed of :
A 16mm bolt on which are fixed three pairs of diametrically opposed 45° strain. These permit the measurement of extension and tension in the bolt.
A tubular component with 2 strain gauges mounted at 180° to measure the compression in the assembly at different heights.
A loading tube to apply bolt pre-load or to apply loading force at various positions along the bolted assembly.
A manually operated hydraulic pump.
A micrometer dial gauge to measure extensions over the complete assembly.
Nuts and washers of various materials.
Equipment Package :
Pre-loaded bolt assembly with hydraulic loading system and manual pump.
A set of washers.
Technical manual and teaching notes.
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