0.5 x Pitch

equal to pitch

Pitch / 0.5

2 x Pitch

100

127

140

135

Diameters decreases helix angle increases

Diameters decreases helix angle decreases

No change in helix angle if diameter increases

No change in helix angle diameter decreases

Lead decreases helix angle increases

Lead decreases helix angle decreases

Helix angle have no change when lead decreases

Helix angle have no change when lead increases