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.
Dell Tech Support Telephone Numbers for Canadians (or those in Canada) Here are the Dell Tech Support Telephone Numbers for Canadians. For US Technical Support Phone Numbers, go here. Although all numbers are 24/7, I recommend calling during normal business if possible. The best techs probably don't like working the graveyard shift (though I'm sure that all good techs do start out with crummy hours).