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Labor Day: The history of the holiday
Labor Day is rooted in the late 19th century, when activists pushed for a holiday to recognize the many contributions workers have made to America.
Wochit
Labor Day is quickly approaching which means the closure of several services and locations for the federal holiday.
Although many places will be closed, there are plenty of fun things to enjoy around Louisville, including concerts, festivals and other activities. Here’s what to know about Labor Day.
When is Labor Day 2025?
Labor Day falls on Monday, Sept. 1, 2025. The holiday is observed on the first Monday in September each year, the U.S. Department of Labor says.
Are government buildings open on Labor Day 2025?
State, local and federal offices will be closed.
Is mail delivered on Labor Day?
No mail will be delivered Monday, Sept. 1. The United States Postal Service is closed.
UPS and FedEx are also closed.
Are banks open on Labor Day?
Banks will be closed on Sept. 1.
Are grocery stores closed for 2025 Labor Day?
Most grocery stores, and other retailers like Target and Walmart, are open on Labor Day. Some stores like Costco, however, are closed.
Are Louisville libraries open on Labor Day?
Louisville library branches will be closed on Labor Day, according to the holiday schedule.
Is TARC operating on Labor Day?
Spokesperson Alex Posorske said TARC will be operating on a Sunday schedule for Labor Day. Transit Authority River City offices and the customer care line will be closed and the TARC3 Reservations Line will be open from 8 a.m. to noon.
Is the Louisville Zoo open on Labor Day?
Louisville Zoo spokesperson Kyle Shepherd said the zoo is open as usual on Labor Day from 10 a.m. to 5 p.m. Visitors must exit by 6 p.m.
Are Louisville pools open on Labor Day?
Louisville Parks and Recreation Public Information Supervisor Katey Cook said the city’s public pools are closed for the summer and will not be open on Labor Day.
Is there school on Labor Day?
Jefferson County Public Schools and Louisville Catholic Schools will be closed on Labor Day.
Upcoming 2025-2026 federal holidays
- Tuesday, Nov. 11: Veterans Day.
- Thursday, Nov. 27: Thanksgiving.
- Thursday, Dec. 25: Christmas.
- Thursday, Jan. 1, 2026: New Year’s Day.
Reach Marina Johnson at Marina.Johnson@courier-journal.com.
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Equilibrado de piezas
El equilibrado constituye un proceso fundamental en el mantenimiento de maquinaria agricola, asi como en la produccion de ejes, volantes, rotores y armaduras de motores electricos. Un desequilibrio provoca vibraciones que incrementan el desgaste de los rodamientos, generan sobrecalentamiento e incluso pueden causar la rotura de los componentes. Con el fin de prevenir fallos mecanicos, resulta esencial detectar y corregir el desequilibrio a tiempo utilizando tecnicas modernas de diagnostico.
Metodos principales de equilibrado
Existen varias tecnicas para corregir el desequilibrio, dependiendo del tipo de componente y la magnitud de las vibraciones:
El equilibrado dinamico – Se utiliza en componentes rotativos (rotores y ejes) y se lleva a cabo mediante maquinas equilibradoras especializadas.
Equilibrado estatico – Se usa en volantes, ruedas y otras piezas donde basta con compensar el peso en un solo plano.
Correccion del desequilibrio – Se realiza mediante:
Taladrado (eliminacion de material en la zona mas pesada),
Instalacion de contrapesos (en ruedas, aros de volantes),
Ajuste de masas de equilibrado (por ejemplo, en ciguenales).
Diagnostico del desequilibrio: equipos utilizados
Para identificar con precision las vibraciones y el desequilibrio, se emplean:
Equipos equilibradores – Miden el nivel de vibracion y definen con precision los puntos de correccion.
Equipos analizadores de vibraciones – Capturan el espectro de oscilaciones, identificando no solo el desequilibrio, sino tambien fallos adicionales (por ejemplo, el desgaste de rodamientos).
Sistemas de medicion laser – Se emplean para mediciones de alta precision en mecanismos criticos.
Las velocidades criticas de rotacion requieren especial atencion – condiciones en las que la vibracion se incrementa de forma significativa debido a fenomenos de resonancia. Un equilibrado adecuado evita danos en el equipo en estas condiciones de funcionamiento.