Chuck guards

I m curious about the various collaborators involved. You got the initial call from the National Guard in February 2004, and by March the unit was headed to Iratf. At that point, you were only working with executive producer Chuck Lacy, is that right ... 

Drill guard - provided to protect the operator from contact with the revolving chuck and drill while still retaining visibility of the operation. These guards range from simple acrylic shields to a fully telescopic metal construction with acrylic windows. A typical pedestal drill guard is shown in Fig. 8.3. 

Larger lathes are best fitted with sliding shield guards shown in Fig. 9.9. These are made from high-quality steel with a polycarbonate window to provide maximum operator protection from chuck, swarf and coolant and provide excellent visibUity. The guard slides over the head-stock and out of the way when access to the chuck or tooling is required. These can also be fitted with an electrical safety interlock to prevent the... 

Full width guards are fitted to the front of the machine table to protect the operator in the event of a workpiece flying off a magnetic chuck and from coolant spray. 

OSHA discusses drill presses in its Safeguarding Equipment and Protecting Employees from Amputations publication. It says, among other things, that for drill presses workers must be protected from the rotating chuck and swarf that is produced by the drill bit. Guarding at the point-of-operation is difficult because of the nature of the drilling press, OSHA says. 

Install an adjustable guard to cover the unused portion of the bit and chuck above the material being worked. 

The study covered all machine tools equipped with numerical control. Of these, lathes were the most important groi both in number and hazards involved. The most serious industrial accidents had happened with lathes, when the cutting tool or the holder had collided with the chuck or the chuck jaw. Due to the high rotation speeds of the chuck (even 6000 - 8000 rpm), a flying chuck jaw causes a great danger in spite of eventual guards. 

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