Types of Door Latches
Latches can be made in various materials in various thicknesses, finishes, and finishes in accordance with the engineering requirements. Engineers can choose a lock that is galvanized to avoid corrosion and to ensure its durability in harsh environments.
Other specifications include the level of security needed to secure an application. A hook lock latch for instance, is more secure than hasps and may require a padlock.
Hook and Eye Latch
The hook and eye latch is a simple method of locking gates, doors, windows, cabinets and sheds. It's also ideal for securing storm panels, porches, and screens. The hook can be screwed in place by hand, without the need for any fancy tools. The screw points are sharp and will pierce into wood quickly and easily, providing stability and security.
To determine the correct hook size, first determine the type of hook. Crosby Group (c): Take a look near the eye or the clevis for the type of hook embossed and size. The size in inches is on one side, and the size in millimeters is on the other. The clevis grab hook comes with the clevis to attach directly to chain, while the eye rigging hook comes with an eye that is large enough for use with synthetics or wire rope. Pewag(c) hook type size (in mm) and grade of the alloy are engraved in the lower part of the hook bowl. Columbus CMCO McKinnon(c): Look for "HA 800" or HA 800-1000" and the size of the hook embossed on the lower portion of the bowl, near the clevis.
Laclede(c) market the Cartec chainhook. It's easy to spot as it has a raised "Cartec" embossed near the bowl's bottom and is available in safety orange or red. van hook deadlocks (c) and CMCO Columbus McKinnon have their names embossed on the lower portion of the hook bowl. Gunnebo also has the swivel hook, which is identified by a "ELD" midway across the bowl. The hook is equipped with a large eye that can spread round and web slings.
Clevis Latch
A clevis latch permits users to secure the hook of a clevis to an anchor point and it also helps prevent the hook from falling loose during loading transfer. Clevis latches come in many different designs, such as those with spring-loaded handles, or those with safety locks. The safety lock is ideal for slip hooks since it guarantees that the load won't fall off unless force is applied downwards. This feature makes slip hooks with clevis compatible with ASME B30.9 Slings standards and OSHA regulations.
A standard clevis lock has the clevis pin, which has a an end with a tang, and a shaped head at the other. These clevises, typically constructed from steel to give strength to the latch they are usually coated with zinc, silver, or chromium. They're often plated with silver, zinc or chromium to prevent corrosion. They can also be tempered.
These latches are utilized in a myriad of applications which range from connecting chains and rigging equipment to securing cargo in pickup trucks as well as on trailers. They can also be employed for heavy-duty applications, such as the securement of machinery and cranes.
Some clevises are made from machined pieces or folded pieces molded into them. They are built with a base that has a hole, whether threaded or unthreaded. They can be welded to other parts using the bolt for clevis.
The clevis pin is generally threaded, and can be inserted into a hole which is smooth or slotted. The pin is larger in diameter than a bolt and is designed to handle massive shearing stresses and take on an axial load.
Many clevis locks are hardened so they can stand up to the strain and vibrations of harsh environments. Some are even certified for overhead lifting, which means they can withstand a greater amount of weight than non-hardened versions. A latch that is hardened can be plated in a variety metals such as nickel or silver to increase its resistance to corrosion. Powder coating or painting can be used to enhance their appearance and provide colour.
Self-closing Latch
The locking mechanisms can be as complex or as simple as the overall design. The majority of these devices are built from metals for durability and strength. They may also be painted or powder coated to enhance the latch's appearance. Latches, no matter what materials they are made of, must be able resist being able to withstand shearing, bending, and other impact forces. The thickness of the latch's barrels, backing plates, and cams is a key element when determining whether they are light, medium or heavy-duty.
It is important to select the latch based on both your security needs and the type of enclosure or door you plan to attach it to. For instance, a light garden gate can be secured with hook latches, whereas an imposing shed door requires a hasp and padlock combination.
It doesn't matter whether you employ an automatic latch or not. The most important thing is that it is properly closed. This reduces the risk of accidental disengagement which can lead work-site injuries. If you're unsure how to tell whether a self-locking ring is ready to load, look for a lock that has an internal stop or trigger mechanism that prevents it from opening.
Another crucial aspect to consider is the hand. Certain types of rotary, bolt, and slam latches are made to be either left-handed or right-handed. Left-handed latches are typically placed in the middle of the latch on doors facing towards the interior. The right-handed models are positioned on the outside of doors and are designed for doors that are facing away from the inside.
There are also latches designed to get around the Adams Rite style commercial door locking latches found on many truck and bus fleets. These tools enter the assembly through a cutout located on the door's side next to the latch. They then pull on the swing bar to retract the latch. These tools are available on the internet or in most hardware stores that carry Adams Rite latches.
Keyed Latch
Latches are utilized to close gates and doors. There are a variety of latches. Each has a distinct purpose. Common latches for doors are hook or clevis latches, cam and cam and compression latches as well as rotary ones. Some latches include locking mechanisms like the panic bar or a keyed lock. Latches are made from various materials, with the metals being the most well-known. They are also subjected to additional procedures to enhance their surface quality. The finishes for latches could include powder coating, painting and polishing.
Keyed latches are latch with a cylinder that requires a specific key to unlock it. The pins and tumblers of the cylinders align with the cut on the key to unlock the latch. Some locks are equipped with extra features, such as anti-pick or anti-drill protection.
A hasp is a type of latch made of a metal band and a staple. The staple is attached with hinges to the other end of the strap with a slot in it. Other materials such as rubber and plastic can be used to make latches, however, metals are more popular due their formability, machinability and the strength.
Door latches are usually made out of metals, however there are exceptions. Some latches, for example made of plastic, are designed to help reduce weight or to meet other design specifications. Other kinds of latches can be utilized for specific applications such as latches designed to be activated by pressing an lever or a handle, allowing emergency exits for buildings and other settings.
There are two types of door latches including levers and knobs. Knobs are usually found on older doors while levers are more popular in modern designs. Some latches can be opened on both sides. This is ideal for doors that are that do not have windows. A"pawl lock" is a straightforward version of a cam lock that can be opened by turning a quarter-turn. It is commonly used in electronic enclosures, buses, trailers, RVs, and trucks.