# HANDTOOLS (NONPOWERED)
> MSHA accident `220090620005` · 02/11/2009 · O-N Minerals (Michigan) Company
## Details
- **Degree of injury:** DAYS AWAY FROM WORK ONLY
- **Classification:** HANDTOOLS (NONPOWERED)
- **Accident type:** Over-exertion in wielding or throwing objects
- **Occupation:** Maintenance man, Mechanic,  Repair/Serviceman, Boilermaker, Fueler, Tire tech, Field service tech
- **Activity:** Hand tools (not powered)
- **Injury source:** AXE,HAMMER,SLEDGE
- **Nature of injury:** HERNIA;RUPTURE
- **Body part:** HIPS (PELVIS/ORGANS/KIDNEYS/BUTTOCKS)
- **Days lost:** 30
- **Mine experience:** 38.62 years
## Operator
- **Controller:** Carmeuse Holding SA
- **Operator:** O-N Minerals (Michigan) Company
- **Mine:** [2000062](https://api.ai-analytics.org/mine/2000062)
## Narrative

Two millwrights were removing a gear from the shaft of a brake. The gear was heated up and one millwright held a B&O hammer next to the gear while the injured employee was hitting the B&O hammer with a 12 pound sledge hammer. As the injured swung the sledge, he felt pain in is lower right groin area, causing a double hernia.

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*Source: [MSHA Open Government Data](https://arlweb.msha.gov/OpenGovernmentData/) · AI Analytics · CC0 1.0*