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Rewiring a Craftsman Drill

noisy jim

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Joined
May 19, 2022
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2
I did a dumb thing. I was replacing the original wire on an old Craftsman drill I found at the local thrift store ($9 with the lunchbox and some original accessories). Simple thing, so I didn't take any pictures of the original connections. Then I got distracted cleaning more sawdust out from around the armature and bearings. An hour later, I go to connect the new cord, and I can't figure out how the switch works. The neutral goes to the wire I connected it to. I know because I did put color-coded twist ties on the wires before disassembling it. The red one denotes that I thought they were both hot, but looking at the switch it doesn't make sense to me. There should be a second hot coming out of the switch. The way I have it in the pic (my current best guess), the power from the cord will bypass the switch, and the drill will run continuously. But I can't think of another way. Any thoughts?

Interesting side note. It seems this 1/4" drill was intended for home use. It included a ground wire, but the ground was separate from the plug meaning you could plug this into a two-prong outlet (no ground). If a three-prong outlet was available, you could plug in the ground wire independently. Pretty ingenious solution for a time when 3-prong outlets were not as common as today.
 

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RTM

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May 13, 2019
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Usually white bypasses the switch. Black goes through the switch, If simple on / off, it does not matter which side of the switch goes to the cord, and which to the motor. Can't see what you've got going on there with all the black wires stacked on top of each other.
 
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noisy jim

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Joined
May 19, 2022
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Got it. A white and a black will go to the motor. The black from the cord will go into the switch and the black from the motor will come from the switch. The white from the cord will go to the motor. That makes sense. Thank you, RTM!
 
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