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.
Check out the below image examples of locating the dell serial number and other details like date of manufacturing and place of manufacturing and the PPID for two different models. For you information, dell serial Number is a 20 digit PPID number on the label to verify the manufacture date. The above monitor(dell s2209w and s2409w and other dell monitors) has the bar code serial number located at the back which can be viewd by just turning the monitor around.