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Here's the drill with one half of the case removed. You need a torx
T15
screwdriver to remove the screws. |
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The 'guts' removed. |
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The main drive, including motor, transmission, spindle, and
chuck. |
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Removing the chuck is a challenge. Twist the chuck open, and
undo the LEFT HAND screw inside. Then you're on your own. Here's how I did
mine. Note that I emptied the transmission, and stuck a piece of steel in
the one remaining gear to hold it still. |
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I chucked up a bolt and put it in a vice. I then used a pipe
wrench to twist the assembly. Not an easy process, which is why you see many
robots with the chucks still in place. With the chuck removed, you can get
the torque dial off. |
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Here's the setup without the chuck. |
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Here's the setup without the motor. |
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The shifter, that allows shifting between high and low gear. |
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The spindle is held in place with a 'U' shaped metal pin. |
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Remove the pin and the spindle will slide out. |
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Here's what the spindle looks like. Note that it has a
bearing pressed on. One end has a crucifix shape that locks into the
transmission, the other side is threaded 1/2"-20, and is tapped with a
1/4"-28 left hand hole. |
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The white plastic piece towards the top allows adjusting the
torque. It simple screws off. |
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The metal piece below it engages a number of springs. It
simply lifts off. |
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This reveals 6 springs sticking out of the housing. Undo the
four screws holding the spindle housing in place, and remove it |
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For clarity, I've separated the black plastic piece, springs
etc from the spindle assembly. |
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Here's the springs, which push on metal nubs that rub against
part of the transmission. This is how the torque is adjusted. |
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The black plastic piece here holds the metal nubs in place, and contains a
bushing for the spindle. |
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With that piece out of the way, we are left with the
transmission itself. Note the crucifix shape that the spindle
engages. |
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Here's the motor side of the transmission, including a metal
plate to keep the gears in place. |
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The insides of the transmission removed from the case. Note
that this transmission includes two plastic gears. |
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All of the pieces separated. |
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Here's the motor. I believe it is a Johnson 700. It has a
plate attached to it that allows mounting to the transmission. |
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Here's the plate removed. |
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The motor has a metal sleeve surrounding it. |
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It simply slides off. |
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Here's the back end of the motor. Wire leads simply slide
onto the terminals. |
