Types of Door Latches
Latches are crafted in various materials and thicknesses, finishes and sizes to meet the specific requirements of engineering. Engineers can select a galvanized lock to prevent corrosion and to ensure its durability in harsh environments.
Other specifications include the degree of security needed for the application. For instance hook lock latches is more secure than a hasp, and might require the use a padlock.
Hook and Eye Latch
The hook and eye latch is a simple way to lock gates doors, windows cabinets and sheds. It's also great for securing storm panels, porches and screens. There aren't any fancy tools needed and the hook can be screwed in manually in a matter of minutes. The screw points are sharp and will pierce into wood quickly and easily to provide stability and security.
To determine the right hook size, you must first identify the type of hook. Crosby Group (c): Check the eye or clevis for the embossed hook type and size. The size is shown on both sides. The clevis grab hook comes with an clevis that can be used for direct attachment to chain, while the eye rigging hook has a large eye designed for use with synthetics or wire rope. Pewag(c): The hook type, the size in millimeters 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 part of the bowl near the clevis.
Laclede(c) market the Cartec chainhook. It's easy to spot since it has a raised "Cartec" embossed near the bottom of the hook bowl and is safety orange or red. Gunnebo (c) and CMCO Columbus McKinnon have their names embossed on the lower part of the hook bowl. Additionally, Gunnebo has a swivel hook that is identified by an "ELD" mark that is located midway across the bowl. This hook features a wide eye that can spread web and round slings.
Clevis Latch
A clevis latch permits the user to connect the hook of a clevis to an anchor point, and also helps to prevent the hook from slipping loose during loading transfer. Clevis latches come in a variety of styles, including ones that have spring-loaded handles, as well as ones with a safety lock. The safety lock is ideal for slip hooks since it ensures that the load won't fall off unless force is applied downwards. This makes slip hooks with clevis compatible with ASME B30.9 Slings standards and OSHA regulations.
A standard clevis lock has an clevis pin that has the tang at one end and a head that is formed at the other. These clevises are usually constructed of steel to provide strength to the latch and are usually plated with zinc, silver or chromium. They are often coated with zinc, silver, or chromium to prevent corrosion. They can also be made harder.
These latches are used in a variety of applications that range from connecting chains and rigging equipment to securing cargo in pickup trucks and on trailers. They're also utilized for heavy duty applications, such as securing machinery and cranes.
Certain clevises are constructed of machines and others are made of folded pieces molded into them. They are built with a base that has an opening, which is threaded or unthreaded. They can be welded to other components with a bolt for clevis.
The clevis pin is generally threaded, but it can be fitted into a hole which is smooth or slotted. The pin is larger than a bolt and is designed to withstand massive shearing forces and to withstand an axial load.
Many clevis locks are hardened so they can withstand the vibrations and stress of harsh environments. Some are rated for overhead lifting. This means they are able to support more weight than the non-hardened models. A latch that is made of hardened material can be plated in a variety metals such as silver or nickel to enhance the resistance to corrosion. Painting or hook deadlocks for vans can be used to improve their appearance and add color.
Self-closing Lock
The locking mechanisms of latches can be as simple or intricate as the overall design. These devices are often constructed of metal to ensure strength and durability. Latches that are painted or powder coated can also improve their appearance. No matter the material used to manufacture them the latches have to be capable of enduring bending, shearing, and impact forces. The thickness of the latch's barrels, backing plates and cams is an important factor when categorizing them as medium, light, or heavy-duty.
The latch you choose should be according to your security requirements as well as the kind of enclosure or door you plan to attach it to. For instance, a light garden gate can be secured with a hook latch, while an imposing shed door requires a padlock and hasp combination.
It doesn't matter if you utilize an automatic latch or not. The most important thing is that it is closed properly. This reduces the chance of accidental disengagement, which can lead to work-site accidents. If you're not sure what to look for to determine if a self-locking hook is ready to load Look for locks that have an internal stop mechanism or trigger mechanism that stops it from opening.
Another important consideration is the hands. Certain bolt, rotary and slam designs have been designed specifically to be right-handed or left-handed. Left-handed latches are usually positioned in the center of the latch on doors that face towards the interior. The right-handed designs are located on the outside of the door and are utilized on doors that are facing outwards from the inside of the building.
There are also special latches that can be used to work around the Adams Rite-style commercial door locking latches found on many truck and bus fleets. These tools enter through a cutout on the side of the commercial door next to the latch. They then reach up inside the assembly to pull on an adjustable bar that opens the latch to the open position. These tools are available on the internet or in most hardware stores that carry Adams Rite latches.
Keyed Latch
Latches are used to close doors and gates. There are a variety of latches. Each type has a specific function. Common latches used for doors include hook, clevis and cam latches and compression latches as well as those that rotate. Some latches are also equipped with locking mechanisms, for example keys for locks or a panic bar. Metals are the most popular material for latches but other materials can also be employed. They can also undergo secondary processes to improve their surface qualities. Typical finishes for latches include polishing, plating and polishing, as well as painting, and coating with powder.
A keyed latch is a latch with a cylinder that requires a key to unlock it. Cylinders contain pins and tumblers which align with cut marks on keys to unlock the latch. Some locks are equipped with extra features, such as anti-pick or anti-drill security.
Another kind of latch is the hasp made up of a metal strap and staple. The staple is attached with a hinge to the other end of the strap with an opening inside. Other materials such as plastic and rubber are used to make latches, but metals tend to be preferred due to their shapeability, machinability, and strength.
Metal is the most popular material for door latches, but there are some exceptions. Some latches, for instance are made from plastic to help reduce weight or to meet other design specifications. Other kinds of latches can be designed for specific purposes like latches that are designed to be operated by pushing a lever or handle, allowing emergency exits from buildings and other environments.
There are two kinds of door latches: knobs and levers. Levers are more prevalent on newer designs, while knobs are typically found on older ones. Some latches are able to be opened on either side. This is ideal for doors that are that do not have windows. A pawl lock is a simple version of a cam lock that can be unlocked by reverse the quarter-turn. It is typically employed on electronic enclosures as well as in trailers, RVs, buses and trucks.