Types of Door Latches
Latches are crafted in various materials in various thicknesses, finishes, and finishes to meet specific engineering requirements. Engineers can choose an electro-galvanized lock 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 example is more secure than hasps, and may require padlocks.
Hook and Eye Latch
The hook and eye latch can be easily installed to secure windows, gates cabinets, sheds, and gates. It's also great for securing porches, screens and storm panels. The hook can be screwed into place by hand, without the use of any fancy tools. The sharp screw tips pierce into wood easily and efficiently to provide extra security and stability.
To determine the proper hook size, first determine the hook type. Crosby Group(c) Find the type of hook and size embossed near the eye or the clevis on the hook. The size is shown on both sides. The clevis grab hook features the clevis to attach directly to chains, whereas the eye rigging hook features a large eye designed for use with synthetics or wire rope. Pewag(c) is the hook type size (in millimeters) and the grade of alloy are embossed in the lower portion of the hook bowl. CMCO Columbus McKinnon (c) Take a look at the "HA 800" or "HA 800-1000" and the size of the hook on the lower portion of the bowl, near the clevis.
Laclede(c) market the Cartec chainhook. It's easy to spot as it has an elevated "Cartec" embossed on the bottom of the hook bowl and is available in safety orange or red. Gunnebo (c) and CMCO Columbus McKinnon have their names embossed in the lower part of the hook bowl. Gunnebo also has a swivel sling hook, which is identified by a "ELD" halfway across the bowl. This hook features a wide eye that can spread round and web slings.
Clevis Latch
A clevis lock allows the user attach a clevis to an anchor, and it prevents the hook from falling off during a transfer of loads. Clevis latches are available in a variety of designs including those with spring-loaded handles, as well as ones with a safety lock. The latter is ideal for slip hooks since they ensure that the load will not fall off the hook unless an inward force is applied. This makes clevis-slip hooks compatible with ASME B30.9 Slings Standards and OSHA Regulations.
A typical clevis lock consists of the clevis pin, which has a the tang at one end and a shaped head at the other. These clevises are usually made of steel to provide the latch with strength and are usually plated with zinc, silver, or chrome. They're usually plated with zinc, silver, or chromium, to resist corrosion. They can also be hardened.
These types of latches are suitable for various applications such as connecting chains, rigging equipment to securing loads in trailers and pickup trucks. These latches can also be used in heavy duty applications such as the securement of machinery and cranes.
Certain clevises are constructed of pieces that have been machined or folded pieces molded into them. They have a base with a hole, whether threaded of unthreaded. They can be welded to other parts using a bolt for clevis.
The clevis pin can be threaded to fit into an open or slotted hole. The pin is bigger than a bolt, and is designed to withstand heavy shearing forces and to withstand an axial load.
Many clevis latches have been hardened to withstand the stress and vibration of use in harsh environments. Some are even rated for overhead lifting, meaning they can withstand a greater amount of weight than non-hardened versions. A latch that is made of hardened material can be plated in a variety metals such as nickel or silver to increase the resistance to corrosion. They can also be painted or powder coated to add color and improve their appearance.
Self-closing Lock
The locking mechanisms can be as complicated or simple as the overall design. These devices are often constructed of metal to ensure strength and durability. They may also be painted or powder coated to enhance the latch's appearance. Regardless of the materials used to manufacture them the latches have to be capable of enduring bending, shearing, and impacts. The thickness of the barrels, backing plates and cams are the primary factors in determining whether they are light-, medium-, or heavy-duty.
The type of latch you select is based on your security needs and the kind of door or enclosure that it will be attached to. For example, a lightweight garden gate can be secured by a hook latch, while a sturdy shed door requires a hasp and padlock combination.
It doesn't matter whether you utilize an automatic latch or not. The most important thing is to ensure that it is shut properly. This will reduce the chance of accidental disengagement that could lead to work-site accidents. If you are not sure whether the hook is ready to be loaded, look for a lock that has an internal trigger or stop mechanism.
Another important consideration is the handedness. Certain bolt, rotary, and slam designs are designed specifically to be left-handed or rights-handed. The left-handed versions are typically placed in the middle of the latch and are utilized on doors that are facing inward towards the inside of the building. The right-handed models are positioned on the outside of the doors and are designed for doors that are facing away from the interior.
There are also special latch tools designed to work around the Adams Rite-style commercial door locking latches on a lot of bus and truck fleets. They pass through a cutout in the side of the commercial door next to the latch. They extend their reach into the latch to pull on an adjustable bar that will retract the latch back into the open position. These tools are available online or at most hardware stores that stock Adams Rite latch products.
Keyed Latch
Latches are used to keep doors and gates closed. There are many different types of latches and each serves a specific function. Common latches for doors are hook cam, clevis and hook latches and compression latches as well as those that rotate. Some latches include locking mechanisms like a panic bar or keyed lock. Latches are made from various materials, with metals being the most well-known. They can also undergo secondary processes to improve their surface qualities. Common finishes for latches include polishing, plating and polishing, as well as painting, and coating with powder.
A keyed latch is a latch that has a cylinder and requires a special key to unlock it. The pins and tumblers in the cylinders align with the cut on the key to unlock the latch. Some locks have extra features, like anti-pick or anti-drill protection.
A hasp is a type of latch made of a metal band and a staple. van hook deadlocks is attached with a hinge to the other end of a strap that has an opening inside it. Other materials like plastic and rubber are used to make latches, however, metals are preferred due to their shapeability, machinability, and the strength.
Door latches are typically crafted from metals, but there are exceptions. For instance some latches are constructed from plastics to reduce the weight of doors or to meet other design requirements. Other types of latches are designed for specific purposes, such as latches designed to be activated by pushing a lever or handle, enabling emergency exits from buildings and other settings.
There are two primary types of door latches including levers and knobs. Knobs are typically found on older doors, while levers are more common in modern designs. Certain latches can be reversed, meaning that they can be opened from either side, which is suitable for doors in interiors where there are no windows. A"pawl lock" is a straightforward version of a cam-lock that can be unlocked by reversing one quarter-turn. It is typically utilized on electronic enclosures, as well as in RVs, trailers, buses and trucks.