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armature repair

3000 HP Cement Motor

After having successfully cutting coils from a stator on site four times previously, the 3,000 HP stator finally died and had to be scheduled to be rewound at a cement plant in KY. The removal of the motor is not the conventional way you think of a motor being removed, you start by removing the outside wall of the building it is in, and then sticking the boom of the crane inside the building to be able to lift the motor. standing at a safe distance from the equipment, the motor does not look all that large, but as if gets [...]

3000 HP Cement Motor2023-03-15T10:11:23-04:00

Sawmill DC Motor

Last summer, we received a call from the maintenance manager of a large sawmill. To get an idea of equipment size, this large bandsaw cuts 6’ diameter tree trunks into quarter pieces. A large carriage carries the log and feeds it into a large bandsaw with a blade that is 12” wide. The quarter pieces then go to smaller saws to cut slab boards. The complaint was that the large DC mill motor was making noise. Our field service supervisor, Jim Delawder, investigated and found that the banding on the commutator end of the armature had fractured and was flopping against [...]

Sawmill DC Motor2022-01-28T17:14:56-05:00

Complex Motor Rewind – DC Mill Motor

Horner Louisville had the opportunity over the Holidays to service a customer who is a plastics extrusion company. The motor came in on an overtime basis, so it was given top priority. The customer sent in a 75Hp FUJI DC Motor that, after disassembly, inspection and testing required a full rewind and machine work that included coatings work on the armature. However, this wasn’t your every day run of the mill DC motor. The motor was a random wound compound design which is known to be a little tricky to wind. Louisville’s winder, Charlie Mings, looked at the winding and was [...]

Complex Motor Rewind – DC Mill Motor2022-01-28T15:33:09-05:00

Centrifugal Force – What Is It?

The words “centrifugal force” were first used in the year 1698, so it is far from a new concept. A dictionary definition is “the apparent force that is felt by an object that is moving in a curved path that acts outwardly away from the center of rotation.” We have all felt the effects of centrifugal force when we are driving our car or truck and turn a corner at a high rate of speed. As long as we are moving in a straight line, we do not feel this force but when we exit the highway at a high rate [...]

Centrifugal Force – What Is It?2021-01-10T16:32:56-05:00

Non Standard 2000 HP Mill Stand Motor

What makes the Horner Motor Division stick out from most motor shops besides the breadth of services it offers is its ability to fix and problem solve non-standard motors and equipment. We employ some of the best winders and mechanics whose knowledge is incomparable. We received a 2000 HP Mill Stand motor from an aluminum plant for repair. Fractures were found in the risers exiting the commutator bars with a design from Siemens that would definitely be considered “non-standard.” Many of the design characterizations were due to lots of horsepower in a fairly small frame. We replaced the commutator, windings, and [...]

Non Standard 2000 HP Mill Stand Motor2020-03-05T18:06:06-05:00

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