Lincoln SA-200-F-162 question(s)

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I just bought a really nice old Lincoln SA-200 powered by the trusty Continental F-162 flathead four. The unit is a 1962 and thus is pure DC, so the power tool outlet is 110 volts DC. I know I can run any tool that is labeled AC/DC off of this, but I am wondering if anyone has tried "standard" power tools such as drills and grinders that are not labeled AC/DC. My belief has always been that any brush-type of motor is the "universal" type of motor and thus would run on DC. Does anyone have experience???Also, what about lighting? What happens if I plug a fixture with an ordinary light bulb into the outlet??I just don't want to hurt the machine. If I fry a light bulb or an old corded drill, so be it. thanks in advance,Sam
Reply:Plug all the light bulbs in you want - regular incandescent bulbs are a simple resistance load and couldn't care less whether it's ac or dc.  I would not try any modern drills, grinders, etc though.  The old "universal" motors are are ok, but most modern powertools do not have universal motors.  And, specially do not plug in any modern power tool that is variable speed - those will definitely not be happy with dc going into them...