Miniature herringbone gears Image credit: Run Ryder | Perpendicular herringbone gears Image credit: Wikimedia | Crossed double helix gear Image credit: 1 DKM 2B. Herringbone gears, also called double helical gears, are gear sets designed to transmit power through parallel or, less commonly, perpendicular axes. The unique tooth structure of a herringbone gear consists of two adjoining, opposite helixes that appear in the shape of the letter 'V'.
More Dell - Tech Support 800 numbers and support. This is the best of 11 ways to contact Dell - Tech Support according to 330378 GetHuman users. Below you can compare the many ways to contact Dell - Tech Support customer service. 877-293-1197.
Already a DIRECTV customer? Call DIRECTV Customer Service number at 1-800-531-5000. When you call, you can pay your bill, order movies, refresh your receivers or get technical support. General support is available every day, 8am-midnight. Hearing impaired customers may call 1-800-779-4388 (compatible TTY equipment required).