Left Hand Coil Spring

Sometimes though you wouldn t want the pitch of the spring to get caught up in the pitch of the threaded mating part.

Left hand coil spring.

To determine the compression spring coil direction hold the compression spring with its axis on a horizontal plane. A coil spring can be wound in either a left hand or right hand direction similar to a screw type thread. If it can be. Pick up your spring and look into it.

For compression and extension springs. Right hand wound rhw vs left hand wound lhw. Compression springs can be left or right hand coiled. If the end of the spring wire in the 9 o clock position then the spring is left hand wound.

The direction of the spring wind can be easily determined by holding it in hand. In the us most screws are right hand. Pick up the spring and look into it. If the last coil of the spring points in the same direction of your fingers then you are looking at the right handed spring.

If the wire is jutting out at the 9 o clock. In applications such as one spring operating inside an other it is necessary to coil the springs so that the helices are in opposite directions right and left. If you are screwing a compression spring onto a mating part you would want the coil direction to matc h that of the threads. The fingers should be placed on the outside of the body and your thumb should point upwards.

If the direction of the coil from top to bottom can be simulated by bending the index finger of the left hand the coil is left hand wound.