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Hard Lock Nuts Offer A Variety Of Benefits

By Lucia Weeks


Utilizing the wedge principle to form a strong self-locking structure is the purpose of (HL units). These are also known as hard lock nuts. A wedge forced into the space between a cylinder and the tube that surrounds it creates an assembly that locks forcefully. If this effect is achieved by matching grooves in the nut and bolt, a wedge can be hammered in but leaves the assembly difficult to operate.

From the standpoint of operability, it is more desirable to employ a set of convex and concave shapes instead of the use of brute force and a hammer and wedge. Tightening this pair of nuts generates the same effects as forcing a wedge home by hammering. The use of threaded screws makes it straightforward to correctly and firmly locate the wedge.

Self-locking ones work in pairs. The bottom nut is tightened first, followed by the upper one. Installing the top nut by hand creates a tightening margin. The intrinsic self-locking outcome is brought into play by the torque created when using a wrench to turn the top nut.

The evolution of this brand of nut had the intention of ending the nuisance of damaged bolts and slack screws. This style of formation has the benefit of averting any shortfall in axial force ensuing as a result of metal fatigue. Traditional Japanese architecture motivated the fabrication of a wedge-shaped, double nut assembly to economically eliminate the drawback of slackness in screws as well as creating enhanced workability.

Confidence and surety are granted by the certainty that such nuts never develop dangerous play. A lot of research into screw looseness has attested to this form of nut's excellence in upholding the original tightening strength. Evaluations done in situ by those working in construction have substantiated the fact that substituting these innovative units for old-fashioned versions significantly diminishes overheads in the form of man-hours. An additional massive advantage comes from the security that locking nuts provide, preventing construction firms from facing legal actions coming to pass from industrial accidents resulting from bolts that shear off or screws that come loose.

There are a number of situations where only this technology has been proven to be adequate. One of these is when a repetitive external force works in the same rotational direction as the bolts, or vertically relevant to the bolt, or perpendicularly to the bolt. Another case can be whenever vibrations are constantly present. Extreme fluctuations in temperature can also be combated by the use of these mechanisms.

HL units create a seal comparable to riveting, adhesive bonding or welding. Unlike these fixings, HL units can be easily removed for servicing or maintenance. As the self-tightening performance does not deteriorate over time, HL units can be re-used time after time.

One of the world's premier manufacturers of these is the Hardlock Industry Co., Ltd. Their apparatus has been endorsed for aerospace functions in prestige projects like the Kansai International Airport. Foremost US aerospace corporations including Boeing make use of HL units due to their safety reputation. The bobsleigh of the Japanese Olympic team utilizes exceptional HL units composed of lightweight titanium.




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