Helical coil

A helical coil has a centerline shape of a helix. A helix (pl: helixes or helices) is a curve that forms a spiral or a coil in space.

CNC Bender uses push bending with a rotational twist in the Rotation axis to create helical tube or pipe coils used in often heat transfer and immersion applications.

Coil Pitch

The pitch of a helix is the width of one complete helix turn, measured along the helix axis.

With CNC Bender the pitch is most affected by the Twist Ratio in the Push Bend Profile Table. The twist ratio is the gear ration of twist degrees of the Rotation axis to the linear motion of the Feed axis in a CNC bender performing push bending.

Increase the ratio value to increase the pitch in a coiled tube.

Coil Radius

The radius of a helical tube shape is controlled mainly by the bend arm angle during push bending. Other factors include the distance between the two opposing rollers in the die and material composition and wall thickness. The largest contributor to the coil radius is the bend arm angle during push bending.