No, Mr. Lemmywinks, No!!!
Join Date: Jun 2005
Location: Harriman, TN
High power dc motors are never really reversable...
They will run backwards, but the brushes will wear out much faster, unless they are of brushless design... which these are not. (mine have brushes, YMMV)
The graphite brushes are set at an angle to the commutator, the copper plates that they rub against, and that angle has a lot to do with the rotation speed, and direction of rotation.
Reversible motors are a compromise, and these fan motors have blades designed to move air a certain direction, so reversability shouldn't be a design concern.
If there is a choice between reversible, and not, use the NOT reversible if you care how long it lasts.
Cordless drills are reversible, but the strongest direction (design direction) is tighten, clockwise, as that is where it will see the highest loading. Take one apart, and you will see what I mean about the offset. (you may be able to see the brushes thru the vent holes.)
AC motors are totally different.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
"War Is Peace. Freedom Is Slavery. Ignorance Is Strength." - George Orwell.
Truth Isn't Truth. - Rudy Giuliani, 2018 Award winner, “Most Outrageous Diversion” by MSNBC for this quote