Because I am not going to open it up, but I am still a curious guy
I have a speed lathe. It has a motor with dual shafts that is integrally mounted with the lathe body on one side. The other side has the shaft ground to a Jacobs Taper and fits a drill chuck. The control has a forward and reverse. In either position, the lathe portion (with the 3-jaw) always rotates in the same direction. The motor shaft with the drill chuck, of course, changes rotation with the control position. The body of the lathe has an oil reservoir for, I can only assume, a gearbox.
When the motor is turned off, the 3-jaw chuck will rotate in only one direction (same as driven by motor). It is very easy to turn and the motor shaft does not rotate in conjunction---the motor shaft (drill chuck) does not move at all. The 3-jaw chuck spindle will not rotate the opposite direction at all. It is solid and I feel no backlash from, say, a ratchet or gear mesh. When you rotate the motor shaft by hand, it does simultaneously rotate the 3-jaw chuck.
I feel like this is a game from the petting zoo when I was a child. Stick your hand in the box and guess what is in there before lifting the cover. Only this time, it is "Name This Mechanism!" Personally, I have no idea. What kind of driver can rotate both ways but produce only one driven rotational direction? At the same time, what kind of driver only allows itself to drive---and not be driven? Sounds fun. Any guesses what is inside this mystery iron box?
I have a speed lathe. It has a motor with dual shafts that is integrally mounted with the lathe body on one side. The other side has the shaft ground to a Jacobs Taper and fits a drill chuck. The control has a forward and reverse. In either position, the lathe portion (with the 3-jaw) always rotates in the same direction. The motor shaft with the drill chuck, of course, changes rotation with the control position. The body of the lathe has an oil reservoir for, I can only assume, a gearbox.
When the motor is turned off, the 3-jaw chuck will rotate in only one direction (same as driven by motor). It is very easy to turn and the motor shaft does not rotate in conjunction---the motor shaft (drill chuck) does not move at all. The 3-jaw chuck spindle will not rotate the opposite direction at all. It is solid and I feel no backlash from, say, a ratchet or gear mesh. When you rotate the motor shaft by hand, it does simultaneously rotate the 3-jaw chuck.
I feel like this is a game from the petting zoo when I was a child. Stick your hand in the box and guess what is in there before lifting the cover. Only this time, it is "Name This Mechanism!" Personally, I have no idea. What kind of driver can rotate both ways but produce only one driven rotational direction? At the same time, what kind of driver only allows itself to drive---and not be driven? Sounds fun. Any guesses what is inside this mystery iron box?
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