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commutator repair

Aluminum Foil Plant Preventative Maintenance

One of Louisville’s largest customers pro- duces aluminum foil. Manufacturing foil starts with aluminum rolls up to 1/2” thick. This plant takes the ½” thick thru mill 6, which reduces the foil thickness to less than 0.100” thickness. From mill 6, the rolls are rolled thinner in mills 3-4-5. After several passes thru these mills, the rolls go to mill 1-2 to roll to thickness required for commercial or residential use. Standard household or standard duty aluminum foil is 0.00063” thick and extra heavy duty foil is 0.00094” thick. Both thinner than 1 thousandth of an inch. Rolling aluminum foil this [...]

Aluminum Foil Plant Preventative Maintenance2023-03-13T10:55:03-04:00

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

Made In Japan, Rebuilt In The US

Everyone is well aware of the quality of Japanese autos in today’s market. In the 1980’s, the Japanese raised the quality bar in the automotive industry, resulting in cars that were of a higher quality and remained in service for many more miles than most of the domestic autos of that time. This off-shore challenge resulted in the upgrade of quality for all American automakers, just to remain in business. This quality concept also applies to the motor repair business and is why our company has Quality Manager like Vernon Pratt, to help us keep quality at the forefront of our [...]

Made In Japan, Rebuilt In The US2020-03-12T15:46:06-04:00

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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