All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
(25784 products available)
Ready to Ship
The four-digit moving combination lock is a very popular lock because it offers a moderate level of security for several everyday objects and spaces. Because of the practicality, the portability, and the availability of the product, four-digit locks can be classified and are commonly found in the following sites:
Luggage locks
To secure personal belongings safely, many travelers use four-digit combination locks on their suitcases, backpacks, and travel bags. The majority of these locks are made to satisfy TSA standards in order to guarantee that U.S. Customs and Border Protection officials can open them without damaging the locking mechanism, as they would have to check a locked bag. The locks are available in both cable and hard design beams.
Lockers
Four-digit combination locks are frequently used to secure lockers in schools, gyms, and swimming-pool changing areas, as well as in workplaces. These locks are useful as they are to be expected when users enter a provided combination to retrieve their belongings, be it school books, gym equipment, or work-related materials. This reduces the need for keys, which can be lost or misplacing.
Storage units
Four-digit combination locks are commonly used to secure doors to rented storage units in warehouses and to bars, boats, and other storage facilities where limited access is desired. This type of locking mechanism, apart from being easily accessible through input of a four-digit code, also helps to protect the user's property and, at the same time, gives peace of mind.
Gates and doors
Four-digit combination locks provide an extra restricted access tool for people using these locks on gates and doors where security is important but not absolute. Garden shed, restricted areas, and residential backyard fencing are some of the common places where these types of locks are employed. In this case, ease of use and avoidance of keys are two primary advantages in their application.
Small safes and boxes
Most small safes or cash boxes use four-digit combination locks to protect money, important documents, and other small valuables. These safes are mainly used in retail businesses, offices, and workplaces as well as in homes to keep valuables out of the reach of children or even unauthorized persons.
Materials
Four-digit combination locks are mostly made from steel, brass, or other metal alloys. Steel is a strong metal. Therefore, stainless steel locks will resist prying and cutting due to its strength. Brass, though softer, is resistant to corrosion. Hence, it may be used in areas that are very humid or coastal.
Water and Dust Resistance
Many four-digit combination locks are rated to some degree for weather. This also means that water and dust can be kept out. This is especially true for locks applied outdoors, where exposure to extremes of weather, such as rain, snow, or dust, is feasible. Locks with seals or watertight bezels tend to be more durable.
Size and Bolt Length
The size of combination locks differs depending the type the lock is intended to serve, be it a locker, gate, or luggage lock. Shorter bolts, salty and thus considered juvenile, are mostly employed in lockers or school areas. For increased security, longer bolts are used in storage units, doors, or safes.
Mechanical vs. Digital
Although the discussion centered on four-digit combination locks is mostly confined to mechanical or manual locks, in this case, users should note that other forms of these locks exist in electronic or digital forms. In this case, more variety is observed in the combination of keypad locks, but these are less common in day-to-day use due to the likelihood of malfunctioning and the need for batteries.
Regular Cleaning
Dust, sand, and moisture can cause a combination lock to jam or become difficult to use if they are repeatedly deposited inside the lock mechanism. Cleaning the lock on a regular basis, especially after use in outdoor or dusty conditions, helps to retain its functionality over time. Alcohol-based wipes or compressed air are useful for cleaning the exterior and interior of the lock mechanism of debris.
Lubrication
As in any set of mechanical combination locks, the moving parts would need to be oiled from time to time. Lubrication makes the moving parts of the mechanism smoother and, at the same time, rejuvenates the lock. One should apply a small amount of graphite powder or lock lubricant inside the combination lock. It is advisable not to use WD-40 since it usually gathers dirt and grime, which may eventually lead to the damage of the lock. In addition to the lock, lubrication should be conducted at least once every six months or more often if the lock is used more regularly.
Weather Protection
In the case of combination locks that are used under elements of nature, four-digit combination locks should be protected from possible effects as much as possible. This includes using weatherproof covers or bleeds to ensure that the mechanism is not affected by dry, wet, or even rust. Users should also ensure that the locks are cleaned and lubricated after the lock has been exposed to extreme weather conditions.
Battery Replacement (for Electronic locks)
Electronic four-digit combination locks will operate effectively only if their batteries are periodically checked and replaced as required. A lock or keypad malfunction usually occurs once the battery has low power. Some devices also come with an audio or visual indicator that notifies users when batteries are about to die. One should replace the batteries frequently to avoid lock failure at crucial times.
Code Changing and Testing
Most four-digit combination locks offer flexibility in this regard: the combination can be changed to accommodate different users or for security reasons such as the lock-mechanism code being lodged by the user. A lock's user manual on how this is done should also be followed specifically. In addition to changing the code, it is also necessary to test the new combination by doing so several times before locking the device to ensure that the lock wouldn't accidentally lock up during crucial moments outside the organization.
Access control in different environments is made possible with the use of four-digit combination locks. Due to the basic nature of these locks, they are preferred to be used where convenience in securing property is matched with a reasonable security level. Below are the situational uses of these locks:
Education Institutions
Lockers in schools offer four-digit combination locks to students for their books, personal items, and other school supplies. The ease of the combination lock with no keys tends to be more attractive when addressed, in particular, to students who have a tendency of losing or misplacing or misplacing keys. Combining these locks also provides an added form of security to students' possessions to ensure they are not accessed by anyone else without their permission.
Fitness Centers and Gyms
In fitness centers, 4-digit combination locks are used to secure the personal effects of members in changing rooms. In these areas, convenience and speed are highly important as people work out, shower, and change. Four-digit combination locker locks are economical and safe, and their applicability provides users with the desired level of security while saving time required for securing items with traditional keys.
Courts of Law and Restricted Areas
Four-digit combination locks are valuable in controlling the access of substances and/or areas that should be kept under lock and key, like restricted work areas, server rooms, and courtyards. These locks are simple to operate but provide better security than simple two- or three-digit locks. They are used to restrict access to potentially dangerous equipment, confidential documents, or restricted personnel only.
Outdoor Applications
All-weather four-digit combination locks are suited for outdoor applications such as securing gates, garden sheds, or equipment storage. Users prefer these locks because they do not require keys, which can be easily misplaced, especially in outdoor settings. Typically, these locks are manufactured to resist the effects of moisture, corrosion, and other weather elements, ensuring that they will continue to securely lock the property throughout the year.
Travel and Personal Security
Four-digit combination padlocks are usually used to secure bags, backpacks, and suitcases when traveling. Travel security is all about convenience, and combination locks indeed provide that. Travelers do not have to worry about the loss of spare keys or the duplication of a new set of keys. This combination lock ensures that the belonging is protected against theft in transit and even in some hot countries with a change in season.
Retail and Business Operations
Valuable items such as cash, merchandise, and confidential documents can be protected using four-digit combination locks in registers, cash drawers, and security boxes. In businesses, the efficiency that these locks provide is more important than employing keys in securing restricted areas or valuable items. Furthermore, the combination can be easily changed, which is most desirable if several employees have access to the same item.
Security level
The four-digit combination lock is perceived to be relatively secure but not very advanced than a three-digit or two-digit combination lock. As a result, one may consider a lock that offers extra digits or more complex internal mechanisms to prevent manipulation by unauthorized individuals. The intended application's value and sensitivity of the assets that are to be secured contribute significantly in determining the security needs.
Durability
Durability is a significant factor when choosing a four-digit combination lock since it will be used in several locations, such as outdoors, schools, or in transit. Choose a padlock made from corrosion-resistant materials such as brass or stainless steel, which will not be affected by moisture, rain, or dust, or by changes in temperature, including extreme-temperature outdoor deployments. Locks that require no maintenance or less frequent maintenance are durable and reliable.
Ease of use
Ease of use is another important consideration in four-digit combination locks, and it means how easy or difficult it is for users to set or change the combination. Some of the features that add convenience are the ones that come with a resettable mechanism that requires no keys, easy instructions, and a step-by-step guide to opening the lock. This becomes particularly important in areas such as schools and gyms, where users, including students and gym members, are commonly a transient population and may require quick access to their lockers.
Cost
Four-digit combination locks are available at various prices. These prices depend on the brand, material used to make it, and other features that the lock comes with. For instance, a combination lock's price will significantly increase if the lock is waterproof, rustproof, or drop-tested. One needs to think about how much he's willing to spend and what level of security he requires.
Installation
In this respect, how easily and effectively the lock can be installed or implemented at its designated use site ought to be examined. Several kinds of four-digit combination locks are designed for their installation to be easy and inexpensive. This is particularly the case with portable locks that can secure bags or storage boxes, or some are designed for locker systems in schools that don't require extra hardware to be fitted into the lock. However, certain locks, such as gate locks or security boxes, may require more time and effort in the installation process.
Combination locks offer average security for such day-to-day applications as securing lockers in schools or gyms, bags while traveling, or storage areas. They are appropriate for use in areas where access by individuals is restricted but not recommended for use where high-value assets or information are kept. For this purpose, high-security locks would be preferred.
It is advisable to change the combination regularly. This should be done anytime a new user needs access to the facility or after the old combination might have been memorized or given out. In areas where security is very important, changing the combination is done on a regular basis, and locks are often changed as well after a certain period.
The best way to prevent a four-digit combination lock from jamming is to clean and lubricate it sometimes. Dust, moisture, or corrosion elements may affect the lock, thus resulting in periodic cleaning and lubrication.
The major distinction is in the method of operation. While electronic combination locks entail the input of the combination through a keypad, mechanical locks require the turning of a knob, lever, or handle after the code has been obtained. This is a big step as electronic locks require batteries and can sometimes malfunction.
A number of four-digit combination locks are rated to be waterproof by their respective manufacturers, which makes them suitable for outdoor use. Padlocks are manufactured specially to resist the effects of rain, moisture, and corrosion and can be used in wet conditions.
