Quoting Post Archived Topic: It will not be bumped to the top of the forum. Topic Ferrofluids Membername   Not a member? Sign Up Free (takes 20 seconds) Password   Forgotten your password? Post Font: Verdana Arial Black Georgia Comic Sans Impact   Size: Tiny Normal Big Huge   Color: Default Dark Red Red Orange Brown Green Olive Cyan Blue Dark Blue Indigo Black [ Check Spelling ] [ Post Preview ] [ LiveTags ] Quote: from [m]Wunarmdscissor[/m] at 7:10 pm on July 5, 2009[quote]Quote: from [m]Angry Kumquat[/m] at 7:07 pm on July 5, 2009[quote]Ferrofluids are used to form liquid seals around the spinning drive shafts in hard disks. The rotating shaft is surrounded by magnets. A small amount of ferrofluid, placed in the gap between the magnet and the shaft, will be held in place by its attraction to the magnet. The fluid of magnetic particles forms a barrier which prevents debris from entering the interior of the hard drive. According to engineers at Ferrotec, ferrofluid seals on rotating shafts typically withstand 3 to 4 psi, but these seals don't work well in translational seals for pistons because the fluid gets mechanically dragged out of the magnetic gap.[/quote] That didn't answer my question.  :rolleyes: [/quote] FAQ Keyword Search: Post Options Favorites Manager Notify me of new replies to this topic by email Notify me of new replies to this topic by private message Original Post Wunarmdscissor Posted at 7:06 pm on July 5, 2009 What role does the solvent(the liquid substance) in ferrofluid play?

Replies Wunarmdscissor Posted at 7:10 pm on July 5, 2009 Quote: from Angry Kumquat at 7:07 pm on July 5, 2009 Ferrofluids are used to form liquid seals around the spinning drive shafts in hard disks. The rotating shaft is surrounded by magnets. A small amount of ferrofluid, placed in the gap between the magnet and the shaft, will be held in place by its attraction to the magnet. The fluid of magnetic particles forms a barrier which prevents debris from entering the interior of the hard drive. According to engineers at Ferrotec, ferrofluid seals on rotating shafts typically withstand 3 to 4 psi, but these seals don't work well in translational seals for pistons because the fluid gets mechanically dragged out of the magnetic gap. That didn't answer my question.   Angry Kumquat Posted at 7:07 pm on July 5, 2009 Ferrofluids are used to form liquid seals around the spinning drive shafts in hard disks. The rotating shaft is surrounded by magnets. A small amount of ferrofluid, placed in the gap between the magnet and the shaft, will be held in place by its attraction to the magnet. The fluid of magnetic particles forms a barrier which prevents debris from entering the interior of the hard drive. According to engineers at Ferrotec, ferrofluid seals on rotating shafts typically withstand 3 to 4 psi, but these seals don't work well in translational seals for pistons because the fluid gets mechanically dragged out of the magnetic gap. All 2 previous replies displayed.