Lock bolts are two-piece metal fasteners used to securely join two surfaces without welding. They have high tensile and shear strength, resist vibration, and can be installed with pneumatic-hydraulic or manual riveters. They are a practical and economical option for many applications.
A bolt is a two-piece metal fastener consisting of a round collar and a barrel with segmented threads. A fastener is something used to join two surfaces and hold them together. A locking bolt is secured when the collar is screwed onto the barrel and pressed into place using a powerful crimping tool. Lock bolts are commonly used to create long-term secure connections that can withstand force and vibration. Machinists often choose to use a locking bolt to securely connect two surfaces when welding is impossible or impractical.
The quick assembly, economical nature and comparative security of deadbolts make them a practical fastening option for almost any application. Lock bolts generally provide similar strength and durability to more dangerous, heat-fastening alternatives such as riveting and spot welding without the possibility of heat damage or the high cost of tooling and training. An easy-to-install and practical heavy-duty latch can remain strong and perform for many years, even in inclement weather. Some lock bolt collars can be removed after installation so the cylinder can be reused with a new collar on another project.
Lock bolts are often designed to have high tensile and shear strength in order to provide optimum structural integrity. Shear strength refers to the ability of a fastener to hold surfaces together with weight loads applied in multiple directions. Tensile strength is the ability of the material from which the bolt is made to remain in one piece despite applied pressures. The integrity of the material and the connection of the lock make the machinery lock bolts reliable connectors.
Traditional bolts usually loosen due to vibration. Movement between two connected surfaces can cause a threaded fastener to slowly rotate and separate. Even a small amount of separation in a fastener reduces the shear strength of the connection. To address this problem, some builders use a secure locking bolt, which is able to resist vibration without loosening or weakening the connected structure.
Most hardware stores have pneumatic-hydraulic and manual lock bolt setting tools, often called riveters. Riveters and power riveters are the tools used to squeeze, or “swag,” the soft metal collar on the bolt to secure the lock. Some riveters have a built-in feature that cuts off the extra length of the threaded barrel once the collar has been squeezed onto the bolt. Pneumatic-hydraulic riveters are a little noisier than hand riveters, but work much faster and generally have more uniform results.
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