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'.
Phone Contact Numbers. The Dell customer service phone number claims the caller must have an order number or express service code when calling. This is not the case. You can contact the general customer service number to ask general questions without this information. General Customer Service: 1-512â338-4400.
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.