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
2.0 (98 Degrees album) 2.0 (98 Degrees album) 2.0 is the fifth studio album by American boy band 98 Degrees. The album was released on May 7, 2013 through eOne Music. It is their first studio album in thirteen years following "Revelation" (2000), The album was released by eOne Music, making it their first released through an independent record label rather than a major label like Motown or Universal Records. "2.0" debuted at number 65 on the "Billboard" 200, and number 12 on the Independent Album chart becoming the group's lowest-charting album since their 1997 debut album, "98 Degrees", which debuted at number 145.