Possible High Torque motor find ... re-purposed for a robotic application.
Beau Schwabe
Posts: 6,566
Awhile back I purchased a 12V radiator cooling fan to help vent or remove some excess heat in my attic... well that worked ok, but the motors were much higher current than I expected.
I liked the blades and all, so I found another suitable motor for the attic job.
Which leads me to this... I have the original motor to the radiator fan left over. Even though the motor is rated for 12V, if I power the motor from a 3.7V Li-Polymer battery it has enough torque that I can't stop it without hurting myself.
The motor itself weighs about 2.5 pounds and has a coil resistance of about 1.1 Ohms. It measures about 4 inches diameter by 2 inches deep not including the motor shaft. The motor shaft is 1/4-inch keyed down to 3/16-inch with a 3/16-inch thread that extends about 1/4 of an inch.
Anyway, I thought that I would pass along that E-Bay has a whole slew of them for $25 with Free Shipping.... Search "radiator cooling fan 12V"
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
I liked the blades and all, so I found another suitable motor for the attic job.
Which leads me to this... I have the original motor to the radiator fan left over. Even though the motor is rated for 12V, if I power the motor from a 3.7V Li-Polymer battery it has enough torque that I can't stop it without hurting myself.
The motor itself weighs about 2.5 pounds and has a coil resistance of about 1.1 Ohms. It measures about 4 inches diameter by 2 inches deep not including the motor shaft. The motor shaft is 1/4-inch keyed down to 3/16-inch with a 3/16-inch thread that extends about 1/4 of an inch.
Anyway, I thought that I would pass along that E-Bay has a whole slew of them for $25 with Free Shipping.... Search "radiator cooling fan 12V"
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
2304 x 1728 - 566K
2304 x 1728 - 642K
Comments
..At 3.7V the motor displayed 0.276 ft/lbs of torque
..At 12V the motor displayed 1.058 ft/lbs of torque
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
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1986 Chevy EL Camino·· No prop yet
1984 Suzukie GS1100GK No prop yet
"Another source for them is going to local bodyshop," - That's a great point!! ... in a collision, the composite blades are the first to go, in most cases there is absolutely nothing wrong with the motor. ...and although the blades are very easy to remove, implying that new blades would be that much easier to put on, the blades are not sold separately, so the motor gets junked.
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Beau Schwabe
IC Layout Engineer
Parallax, Inc.
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
1986 Chevy EL Camino·· No prop yet
1984 Suzukie GS1100GK No prop yet