Types of Door Latches
Latches are made from various materials, finishes, and thicknesses according to the requirements of engineering. Engineers can choose a galvanized lock to prevent corrosion and ensure long-lasting durability in harsh environments.
Other specifications include the level of security needed for the application. For instance hook lock latches is more secure than a hasp and might require the use padlocks.
Hook and Eye Latch
The hook and eye latch is an easy-to-install way to lock gates, doors, windows cabinets and sheds. It is also perfect for securing screens, porches and storm panels. There aren't any fancy tools needed and hooks can be screwed into place by hand in minutes. The sharp screw tips pierce into wood easily and efficiently to provide extra security and stability.
To determine the proper hook size, first identify the hook type. this article (c) Find the hook's type and size embossed close to the eye or clevis of the hook. The size is displayed on both sides. The clevis grabber hook features an clevis that can be attached directly to chain, whereas the eye rigging comes with an eye with a large, angled angle for use with synthetics or wire rope. Pewag(c) Hook type, size in mm and the grade of alloy is engraved on the lower surface of the hook bowl. Columbus CMCO McKinnon(c): Look for "HA 800" or HA 800-1000" and the hook's size embossed on the lower portion of the bowl near the clevis.
Laclede(c) market the Cartec chainhook. It is easy to recognize because it features "Cartec" raised embossed at the bottom of the bowl, and safety red or orange. Gunnebo (c) and CMCO Columbus McKinnon have their names embossed on the lower portion of hook bowl. Additionally, Gunnebo has a swivel hook that is identified by an "ELD" mark that is located midway up the hook bowl. This hook features a wide eye that can spread round and web slings.
Clevis Latch
A clevis lock lets the user to attach a clevis onto an anchor and prevents the hook from falling off during a transfer of loads. Clevis latches are available in a variety of different styles, including those with spring-loaded handles, or ones equipped with safety locks. This is ideal for slip hooks since they ensure that the load doesn't fall off the hook until an inward force is applied. This feature makes clevis-slip hooks compatible with ASME B30.9 Slings Standards and OSHA Regulations.
A typical clevis latch has the clevis pin as well as tang at one end, and a head that is formed on the other. These clevises, usually constructed from steel to give the latch with strength, are often plated with zinc, silver, or chromium. They're often plated with silver, zinc, or chromium to prevent corrosion. They can also be hardened.
These types of latches can be used in different purposes including connecting chains to rigging equipment to securing loads in pickup trucks and trailers. They are also utilized for heavy duty applications, like securing machinery and cranes.
Some clevises are made of machined pieces, while others have folded pieces that have been molded into them. They have a base with an opening, which is threaded of unthreaded. They can be connected to other parts using a bolt for clevis.
The clevis pin is threaded and fitted into a smooth or slotted hole. The pin has a greater diameter than a bolt, and it's designed to support huge shearing stress and support an axial load.
Many clevis locks are hardened to stand up to the strain and vibrations of harsh environments. Some are designed for overhead lifting. This means they can support more weight than non-hardened models. A latch that is made of hardened material can be plated in a variety metals like silver or nickel to improve its corrosion resistance. They can be powder coated or painted to add color and improve their appearance.
Self-closing Latch
The latch's locking mechanisms can be as simple or complex as the overall design. Often, these devices are built from metals to ensure strength and durability. They may also be powder coated or painted to improve the appearance of the latch. Regardless of the materials employed to make them, latches must be strong enough to withstand the bending, shearing, and the forces of impact. The thickness of the latches' barrels, backing plates, and cams are key factors in determining if they are light-, medium or heavy-duty.
The kind of latch you choose must be dependent on your security requirements and the type of enclosure or door it will be attached to. For instance, a light garden gate can be secured with hook latches, while a sturdy shed door requires a padlock and a hasp combination.
It doesn't matter whether you use an automatic latch or not. The most important thing is to ensure that it is properly closed. This reduces the chance of accidental disengagement, which can lead to work-site accidents. If you're unsure whether the hook is able to be loaded, look for a lock with an internal stop mechanism or trigger.
Another important consideration is the handedness. Certain designs of bolt, rotary, and slam latches are designed to be left-handed or right-handed. Left-handed latches are typically placed in the center of the latch on doors that are facing towards the interior. The right-handed designs are positioned on the outside of the door and are employed on doors that open outwards from the interior of the building.
There are tools that can bypass the Adams Rite style commercial door locking latches found on many trucks and bus. These devices are inserted through a cutout located on the side of the door next to the latch. They then pull on the swing bar to retract the latch. These tools are available on the internet or in the majority of hardware stores that sell Adams Rite latches.
Keyed Latch
Latches are used to keep doors and gates closed. There are many different types of latches and each has a particular purpose. The most common door latches are hook or clevis, cam compression and the rotary latches. Some latches come with locking mechanisms like a panic bar or keyed lock. Metals are the most commonly used material for latches but other materials can be employed. They can also be subjected to further procedures to enhance their quality of surface. Common finishes for latches include polishing, plating and polishing, as well as painting, and coating with powder.
Keyed latches are latch that has a cylinder and requires a specific key to unlock it. Cylinders contain pins and tumblers, which align with the cut marks on keys to unlock the latch. Some locks have extra features, like anti-pick or anti-drill protection.
Another type of latch is the hasp made up of a metal strap and staple. The strap has a slot punched at one end that is able to fit over the staple and the staple is attached to the other end of the strap using hinges that allow it to swing. Other materials, such as plastic and rubber can be used to create latches, however, metals are preferred due to their formability, machinability and the strength.
Door latches are generally made out of metals, however there are exceptions. For instance certain latches are made from plastics to reduce the weight of a door or to meet other design specifications. Different types of latches are utilized for specific applications like latches that are designed to be activated by pressing the lever or handle, which allows emergency exits for buildings and other environments.
There are two primary kinds of door latches, namely knobs and levers. Levers are more prevalent on modern designs, whereas knobs are typically found on older models. Certain latches can be reversed, which means they can be opened from either side, which is particularly suitable for doors in interiors where there are no windows. A pawl lock is a simple version of a cam-lock which can be unlocked by reversing the quarter-turn. It's commonly used in electronic enclosures trailers, buses, RVs, and trucks.