Lawdy! I am still futzing with my old craftsman 6" jointer and am going to
swap motors out for MORE POWER. The spare motor I had laying around is 1.5
hp. It's an old GE unit, probably weighs 80# - capacitor start, ALL cast
Anyway, the original jointer motor is 1/2 hp at 3450 rpm and has a 2.5" D
pulley. The GE motor is 1.5 HP at 1715 RPM. It has a ~4" D pulley. Now, I
know that should get a 5" D pulley, but live in a small town, and darn it,
the local hardware store just doesn't have a huge selection of pulleys with
7/8" bore... none, in fact...
So, I'll go with what I have for now - knowing that the cutterhead speed
will be a bit low. My question is that WITH a 5" pulley, will I only have
an effective HP or Torque of 3/4 HP since I am doubling the output speed?
I am also wondering if 1.5 HP may be a bit rich - the bearings in the
jointer are okay and all... I don't use do face jointing of boards so I
don't think I'd be putting that much of a load on it, but with the existing
1/2 HP I could easily (very easily) overload it edge jointing 6/4 oak.
Final question - the motor data tag says it'll run 110/220, but I have *NO*
idea how it is currently (no pun intended) wired, and have no manual for it.
How can I tell how it's wired?