Violation Detail
Standard Cited: 5A0001 OSH Act General Duty Paragraph
This violation item has been deleted.
Inspection Nr: 122172752
Citation: 01001
Citation Type: Serious
Abatement Date: 08/22/2008 X
Initial Penalty: $1,500.00
Current Penalty:
Issuance Date: 07/08/2008
Nr Instances: 1
Nr Exposed: 3
Related Event Code (REC): A
Gravity: 10
Report ID: 0336000
Contest Date:
Final Order:
Emphasis:
| Type | Latest Event | Event Date | Penalty | Abatement Due Date | Citation Type | Failure to Abate Inspection |
|---|---|---|---|---|---|---|
| Penalty | I: Informal Settlement | 09/19/2008 | 08/22/2008 | Serious | ||
| Penalty | Z: Issued | 07/08/2008 | $1,500.00 | 08/22/2008 | Serious |
Text For Citation: 01 Item/Group: 001 Hazard: EXPLOSION
Section 5(a)(1) of the Occupational Safety and Health Act of 1970: The employer did not furnish employmnent and a place of employment which were free from recognized hazards that were causing or likely to cause death or serious physical harm to employees in that employees were exposed to an exploding abrasive wheel: (a) On or about May 27, 2008 in the Machine Shop, an employee was deburring "C" clamps when the twenty-four inch abrasive wheel exploded. The unidentified floor stand grinder did not have a self-closing guard. AMONG OTHER METHODS, ONE FEASIBLE AND ACCEPTABLE METHOD TO CORRECT THIS HAZARD WOULD BE TO FOLLOW THE INSTRUCTIONS IN ANSI B7.1- 2000,SAFETY REQUIREMENTS FOR THE USE, CARE AND PROTECTION OF ABRASIVE WHEELS, SECTION 4.3.3.1.1, WHICH STATES AS FOLLOWS: 4.3.3.1.1 Self-closing guard In order to protect all personnel who are in the plane of rotation of the grinding wheel, all floor stand grinders designed to be used with 24" diameter wheels or larger, shall be equipped with a guard which closes automatically at the occurance of a wheel breakage. Other guard designs which provide equivalent protection to the personnel in the plane of rotation of the wheel may be used. EXPLAINATION E 4.3.3.1.1 Self-closing guard The engineering concept of the self-closing guard is very simple to understand. In the event of a wheel breakage, the wheel pieces fly tangentially outward. They strike, at an angle, one or more paddle-like surfaces which are fixed to a movable gate located within the primary guard. The kinetic energy of the wheel is transferred to this gate, causing it to instantly swing shut so as to prevent broken pieces from escaping from inside the primary machine guard. High speed photography shows the effectiveness of this guard design. When a wheel breakage occurs, the piece of wheel that actually leaves the opening of the guard was not the piece facing the operator at the instantaneous moment of breakage. The piece was one well within the guard, but headed for the guard opening due to tangential rotational forces imparted to it just prior to breakage.
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