Tubular Locks are widely used for doors, cabinets, machines and storage boxes due to their simple structure and good safety performance. Choosing the right size of a tubular lock is very important. A wrong size will cause installation failure, loose locking or poor safety. People can follow three simple and practical steps to decide the proper tubular lock size. First, measure the thickness of the installation panel or door. This is the most basic and key factor for lock sizing. Most standard tubular locks fit panels with a thickness of 35mm to 45mm. People need to use a tape measure to check the exact thickness of the door or cabinet board at the installation position. If the panel is too thin, a long lock Cylinder will stick out and affect use. If the panel is too thick, a short lock cannot reach the fixed position, making the lock useless. Matching the lock length to the panel thickness ensures stable installation. Second, confirm the backset size of the lock hole. Backset refers to the distance from the edge of the door or panel to the center of the pre-drilled lock hole. It decides the installation position of the lock and Handles. Common standard backset sizes are 60mm and 70mm for daily Door Locks. Before buying a tubular lock, people must measure this distance strictly. A mismatched backset will make the lock unable to align with the hole, leading to difficult installation and unsmooth opening and closing. Third, select the lock diameter and pin number based on usage scenarios. Tubular locks have different diameters such as 16mm, 20mm and 25mm. Small-diameter locks suit light devices like gift boxes and small cabinets. Larger ones are for heavy doors and industrial equipment. Besides, 4 to 6-pin locks are enough for low-security indoor use, while 7 or 8-pin locks with higher security are fit for vending machines and medical cabinets.
In conclusion, deciding tubular lock size depends on panel thickness, backset distance and actual usage needs. Following these simple rules helps pick a suitable, durable and safe tubular lock, avoiding unnecessary waste and installation troubles.
