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From globalspec.com
The base material in the joint is aluminium 5083 and the bolt/nut is made of A2 stainless steel. The bolt is special design for this application with a shaft of diameter 10mm and a thread of M8. Today the customer uses a spring washer, counter nut and Loctite 243. The company wants to investigate if a NL10ss washer will make the joint vibration proof. This test will not include a vibration test, since it is not possible to build in the application in our test rig. However, a functional test will be carried out, showing if the wedge locking effect of the NL washer will occur. In our test according to above specified conditions a wedge locking effect was achieved on both applications. The pre-specified torque of 10Nm was enough to create clear impression marks in both tests. For application one we recommend NL10ss with a torque of 10Nm. For application two we recommend NL8sp ss with a torque of 10Nm.
Products & Services
Washers are disks of metal or non-metallic material placed beneath a nut, an axle bearing, or a joint, to relieve friction, prevent leakage, isolate, prevent loosening, or distribute pressure.
Nuts are fasteners that are designed to fit around and secure a bolt or screw. The application determines the type of nut to use.
Wave washers or wave springs are wavy metal washers designed to provide a compensating spring force and sustain a load or absorb shock.
Quick connect fasteners can be easily assembled without the use of tools.
Tool support systems provide support for one or more tools, such as impact wrenches, screwdrivers, staplers and other tools.
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Topics of Interest
Today the customer uses a counter bored conical washer and a standard M16 10.9 grade bolt. He wants to investigate if the locking effect can be improved by using a Nord-Lock washer. Therefore, a...
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Torque-Load diagram 3: At a torque of approximately 270Nm a clamp load of 82kN was achieved. The clamp load / torque ratio is 0,3. Vibration test 3: Nord-Lock showed normal settlements in preload of...
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This company is a leading manufacturer of tower cranes. Many of their bolted joints are on painted surfaces and now they would like to investigate whether Nord-Lock washers will provide a good locking...
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This company in Belgium manufactures trailers, some of them mainly in aluminium. Today they use standard flat washers together with grade 8.8 bolts and nuts. This test will be a comparison between a...
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A design engineer at the company considers using a NL24 washer for a “problem” application. He is in need of some test data, including an untightening graph, to support his recommendation. This test...
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