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  1. #1
    sprucetop1 is offline Plastic
    Join Date
    Jan 2009
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    United Kingdom
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    43

    Default Century Electric Co. Motor

    Recently purchased a 1920's Milnes lathe made in Bradford UK. The underbench drive motor is a 1/3rd. hp. 230 V single phase repulsion start induction unit manufactured by the Century Electric Co., St. Louis , Mo. This motor is inoperative, and the internal wiring looks to be in poor condition. Does anyone have an idea of the age of this motor, (ser. no. F923712), and any info. about the Century Electric Co. ? I'd like to get the unit overhauled in due course. I attach a pic of one end of the motor as found.......thanks......John
    Attached Thumbnails Attached Thumbnails milnes5.jpg  

  2. #2
    bytewise is offline Cast Iron
    Join Date
    Dec 2007
    Location
    Wappingers Falls NY
    Posts
    325

    Default century motor repair

    Century motors are old but very rugged. You may be able to service it yourself.
    I suggest you take it apart. The wiring is simple. You should check the windings for short to ground or open coil. If ok, proceed to clean up the machine. You could re-insulate the connection wires if necessary. The starting switching is completely mechanical. There is a centrifugal leverage system that moves a bunch of shorting pieces axially as the motor speed increases. This shorts all the armature coils to make the motor run in induction mode. The linkage may also lift the brushes on the flat commutator. Clean all the parts and be sure there is no grease on the copper parts. The bearings on the Century motors I have seen are bronze sleeve bearings with an oil reservoir. If worn, the bronze bearings can be replaced inexpensively.
    Good luck, Hugh

  3. #3
    sprucetop1 is offline Plastic
    Join Date
    Jan 2009
    Location
    United Kingdom
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    Default

    Hugh......THANKS for suggestions re. the Century. I've set the lathe up with another (working) 1/4 hp. motor and put the Century in store pending more information. It looks to be a very well-built unit and well worth getting going. Any idea what happened to the Century Co.......?

  4. #4
    L Vanice is offline Diamond
    Join Date
    Feb 2006
    Location
    Fort Wayne, IN
    Posts
    8,997

    Default

    A. O. Smith bought Century Electric before 1952. They still use the Century brand name.

    http://www.aosmithmotors.com/html/history.html

    Larry

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