Keeping your DC motor cool

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Jim

SP stands for static pressure ie discharge pressure of fan in terms of inches water.  As static pressure (resistance / friction) go up flow (CFM) goes down.  Looked in Grainger that fan should work and maybe then some.  Use a flexible tubing with SMOOTH interior (least friction).  No Seattle Comm Coll has a Zenn in their electrical lab torn down to the frame.  It had a small blower attached to the motor with about 1" tubing.  Yours will definitely keep that motor cool.  Ideally get some tin and adapt from square outlet to inside dia of tubing say 1 1/2".  Sheet metal shop can fix you up with this if you are not a tin bender.  Dont remember if there are two "holes at either end of motor which would be ideal.  Air goes in one end and out the brush rigging commutator end to keep motor clear of carbon dust.  Mount blower high up in chassis to prevent sucking up water and filter blower intake.

Dan Bentler