What you need to know about Cage nut

As a key component in the field of mechanical connection, Cage nut play an irreplaceable role in preventing thread loosening. Unlike ordinary nuts that rely on simple friction to maintain tightening, Cage nuts achieve a dual anti-loosening mechanism through special structural design. From automobile chassis to wind turbine main shafts, the usage rate of such parts in dynamic load scenarios such as vibration and impact exceeds 83%, and their reliability directly affects the safe operation of equipment.

The anti-loosening principle is mainly divided into friction anti-loosening and mechanical locking. The friction type increases friction by increasing the roughness of the contact surface or embedding non-metallic materials (such as nylon rings). The typical representative is the nylon locking nut, whose friction coefficient can reach 0.15-0.25, which is more than 40% higher than that of ordinary nuts. Mechanical locking relies on deformed tooth patterns or wedge-shaped structures to form physical interference. For example, a full metal locking nut can still maintain a displacement within 0.02mm when subjected to an axial load of 5kN.

Material selection directly affects locking performance and service life. Common material comparisons are as follows:

The installation process is the key link to ensure the locking effect. It is recommended to use a torque wrench to accurately control the preload. For carbon steel nuts of M12 specifications, the standard torque value should be controlled within the range of 45-55N·m. The number of repeated uses must be strictly limited. It is recommended that the nylon insert type should not be reassembled more than 3 times, and the all-metal type can withstand 5-8 repeated uses. Under working conditions where the vibration frequency exceeds 50Hz, it is recommended to use it with thread glue, which can increase the anti-loosening durability by more than 30%.

With the development of intelligent manufacturing, smart locking nuts with preset torque indication function have become popular. This type of product has a pressure-sensitive coating on the flange surface. When the set torque value is reached, the coating color changes visually, so that the assembly accuracy error is controlled within ±5%. In the field of rail transit, this type of nut has achieved 100% online detection coverage, greatly reducing the cost of manual verification.

Cage nut s are the main products of DABANG Fasteners. DABANG Fasteners provides Cage nut s of various materials, such as stainless steel Cage nut s, alloy steel Cage nut s, galvanized Cage nut s, etc.