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.
1 The customer service phone number is 1-800-531-5000. 2  The corporate phone number is 1-310-964-5000. 3  Email: We found no email address for corporate or contact form for DirecTV headquarters.irecTV Headquarters 2230 E. Imperial Hwy El Segundo, CA 90245. Or. DirecTV P.O. Box 6550 Greenwich Village, CO 80155. 1  Phone Number: You can call the DirecTV headquarters and customer service center at 1-855-802-3473.