What amperage should be used for longitudinal magnetization of a bar that is 152 mm long and 51 mm in diameter with a 5-turn coil?

To determine the appropriate amperage for longitudinal magnetization using a coil, several factors need to be established, including the dimensions of the part being examined and the specific characteristics of the coil.

In this instance, we are considering a bar that is 152 mm long and has a diameter of 51 mm, and the setup utilizes a 5-turn coil. The magnetic field intensity induced in a part can be influenced by the turns in the coil and the current flowing through it.

The formula to estimate the current required for longitudinal magnetization in a solenoid (or coil) can typically be derived from the necessary magnetic field strength, which is often evaluated in terms of amperes per turn. For ferromagnetic materials, a rule of thumb suggests a requirement of around 2 to 5 A-turns per mm of part length for proper magnetization, depending on material and operational specifics.

In this case, with a 5-turn coil covering a length of 152 mm, the calculations would tend to indicate that a significant current is necessary to produce adequate magnetization. By using the rule of thumb for amperes per turn, we can derive the effective current needed; thus, the average range multiplied by the number of turns leads us to propose appropriate amper