TOP-LOCK ^® washer vibration test

◆ Fittings vibration test is one of the reliability of the bolt connection methods  The vibration   test of TOP-LOCK^® secure fastening system conforms to the DIN 65151  standard and DIN25201 standard. Pre-tightening force(bolt tensile) is measured by the radial force transducer.

◆The locking effect with TOP-LOCK^® standard nuts is greater than with ordinary ones (such as nut of nylon material).Bolt by the friction between the screw thread lock, thus lost most of the pre-tightening force produced by vibration, this is mainly caused by the sink in the thread.And those from the TOP - LOCK^®fixed parts only show a small part lost pre-tightening force.

◆When using TOP-LOCK^® washer ,after appropriate tighten nut, bolt is  firmly locked.Solid locking performance is that pre-tightening force increased when using wrench to loosen the nut (rather than loose nut in an instant).This is the unique feature of the TOP-LOCK^® washer .

◆This test shows : TOP - LOCK ^® securing and fastening system can safely fastening screw/bolt connection: basic constant clamping force after 2000 turn. At the beginning of the test , a small amount of tension loose only due to the normal bolt connection.

TOP-LOCK^®Material

Scope

Hardness

Salt spray test

Steel washer (Delta protekt ^® surface coating)

large diameter (expressed in "SP")

>465HV1

>600h

Stainless steel EN1.4404 alloy steel

large diameter (expressed in "SSS")

>520H0.05

>1000h