Helix angle the helix angle. The efficiency can be plotted versus the helix angle for a constant friction, as shown in the adjacent diagram. The maximum efficiency is a helix angle between 40 and 45 degrees, however a reasonable efficiency is achieved above 15°. Due to difficulties in forming the thread, helix angle greater than 30° are rarely used. Moreover, above 30° the friction angle becomes smaller than the helix angle and the nut is no longer self-locking and the mechanical advantage disappears. In helical and worm gears, the helix angle denotes the standard pitch circle unless otherwise specified. Application of the
The Three Degrees following year they released a new single "Holding Back". In January 2011, Freddie Pool replaced Cynthia Garrison, who was suffering from Piriformis syndrome, as the Degrees had touring commitments to fulfill. In 2016 The Three degrees released their first full-length studio album with member Freddie Pool entitled "Strategy: Our Tribute To Philadelphia", through Cherry Red Records. The Holiday/Scott/Garrison version of The Three Degrees was the longest running formation of the group (1989–2010). The Three Degrees The Three Degrees is an American female vocal group, which was originally formed in 1963 in Philadelphia, Pennsylvania. Although a total of 15 women have