HEICO FASTENING

HEICO-LOCK® WHEEL NUT

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Đai ốc Heico-lock
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​The HEICO-LOCK® Wheel Nut is the reliable solution for the problem of self-loosening of wheel nuts on both roads and rough terrain. The captive and rotary combination of the nut and the proven HEICO-LOCK® Wedge Lock Washers provides ideal protection for securing your wheels even under the most adverse circumstances, high speeds and demanding road conditions. With the HEICO-LOCK® Wheel Nut accidents caused by wheel loss are a thing of the past!

DESIGN OF THE WHEEL NUT

The HEICO-LOCK® Wheel Nut is supplied pre-assembled. The nut and the HEICO-LOCK® Wedge Lock Washers are combined in a captive and rotary way, ensuring the HEICO-LOCK® Wedge Lock Washers and the nut are fixed permanently in the correct position with the wedge lock washers securing your bolted joint using the proven HEICO-LOCK® principle without loss of quality or function

ADVANTAGES FOR YOU 

  • Significantly reduces risk of accidents by loosening of wheel nuts
  • Easy handling due to pr-assembled combination of HEICO-LOCK® Wedge Lock Washers and nut
  • Minimized risk of operating and production breakdowns caused by faulty bolted connections
  • Reduction of assembly time and effort
  • Can be re-used without any reduction in function or quality
  • Easy, safe and fast installation even for non-specialist users
  • Fixed permanently in the correct position

TECHNICAL SPECIFICATIONS

     

1. Pre-assembled locking system

  • The HEICO-LOCK® Wheel Nut is supplied pre-assembled and provides the user the clear benefit of always being in the correct locking position – particularly important if being installed and removed repeatedly


2. Difference in hardness: HHEICO > HMaterial

  • In comparison to the surface of the HEICO-LOCK® Wheel Nut (class 10) the surface hardness of the clamped parts has to be lower
    • Steel (through hardened) 485 ±25 HV0.3


3. Difference in angles: α > β

  • The wedge angle (α) between the HEICO-LOCK® Wedge Lock Washers is greater than the pitch (β) of the bolt thread
  • This angle means the expansion in thickness of the HEICO-LOCK® Wedge Lock Washers is greater than the possible longitudinal movement of the bolt along the thread


4. Difference in friction: μa > μi

  • The wedge-shaped surfaces have a considerably lower friction coefficient μi than the toothed outside of the washers (friction coefficient μa)
  • Loosening due to dynamic loads causes movement between the two washers in the region of the wedged shaped surfaces


5. Difference in preload: Fdyn > Fstat

  • An expansion in thickness of the HEICO-LOCK® Wedge Lock Washers as a result of loosening leads to an increase in the clamping force
  • This causes an increase in the preload compared to the static state and thus causes the bolt to self lock