Shipyard Machinery and Power Tool Safety (Including Guarding) A Hazard Prevention Course Conducted By The Port of San Diego Ship Repair Association This material was produced under grant SH-31243-SH7 from the Occupational Safety and Health Administration, U.S. Department of Labor. It does not necessarily reflect the views or policies of the U.S. Department of Labor, nor does mention of trade names, commercial products or organizations imply endorsement by the U.S. Government. 1
Table of Contents 2
Course Objectives 3
OSHA 4
Recent and Real Machinery Hazards 5
Machinery Hazards Exercise A lathe is a machine that rotates the workpiece about an axis of rotation to perform various operations such as cutting, sanding, knurling, drilling, deformation, facing, turning with tools that are applied to the workpiece to create an object with symmetry about that axis. 6
Your Risk Exercise
Where Mechanical Hazards Occur Power Transmission Device Other Moving Parts Point of Operation Controls
Hazards to be Guarded
Motions Rotating - Gears Reciprocating - Table Transverse Motion - Belts
In-Running Nip Points Rotating - Gears Reciprocating - Table
Action Cutting Band Saw Punching Metal Punch Shearing Shearing Machine Bending Bending Machine
Exercise 13
Applicable Regulations
Machine Guards and Devices
Machine Guards Fixed and Interlocked Fixed Interlocked
Machine Guards Adjustable and Self-Adjusting Bandsaw blade Circular table saw Adjustable Self-Adjusting
Exercise From a safety perspective identify the pros and cons of each type of guard below. 18
Guarding Devices Presence Sensing and Pullback Presence sensing device Cables attached to operator s hands or wrists Removes hands from point of operation during danger period Pullback
Guarding Devices Restraint and Safety Controls Safety Cable Restraint Safety Controls
Guarding Devices Gates and Two-Handed Controls Gates Two-Handed Controls
Safeguarding by Location and Distance
Exercise 1 3 2 5
Specific Machines Hazards and Solutions 24
Abrasive Wheel and Grinder Rotating (Motion) Cutting (Action) Protective Shields
Abrasive Wheel and Grinder Hazards
Abrasive Wheel and Grinder Solutions
Band Saw?????? (Motion)?????? (Action)
Band Saw Hazards
Band Saw Solutions Properly adjust the blade guide to fit the thickness of the stock and ensure the guard is as close as possible to the stock.
Shop Saw (Cut-Off Saws) Rotating (Motion) Cutting Miter Saw Chop Saw (Action)
Shop Saw Hazards
Shop Saw Solutions
EXCERCISE 34
Drill Press??????? (Motion)??????? (Action)
Drill Press Hazards
Drill Press Solutions
Wood Lathe??????? (Motion)??????? (Action)
Wood Lathe Hazards
Wood Lathe Solutions
Planer??????? (Motion)??????? (Action)
Planer Hazards
Planer Solutions
What Should Have Been Done Differently? 44
Milling Machine??????? (Motion)??????? (Action)
Milling Machine Hazards
Milling Machine Solutions
Roll-Forming & Roll-Bending??????? (Motion)??????? (Action)
Roll-Forming & Roll-Bending Hazards
Roll-Forming & Roll-Bending Solutions
Machine Guarding Checklists
Questions/Comments 52
Portable Power Tools 53
Power Tool Hazards - Exercise 54
Applicable Regulations
OSHA Precautions 56
More OSHA Precautions 57
Controls and Switches 58
Specific Tool Hazards and Solutions 59
Abrasive Grinders 60
Exercise 61
Abrasive Grinder Hazards 62
Abrasive Grinder Hazard Solutions 63
Hazard Solutions - Preparation 64
Hazard Solutions - Inspection 65
Hazard Solutions Ring Test Replacing the Wheel 66
Hazard Solutions PPE Switch the Grinder On 67
Hazard Solutions Grinding Switch the Grinder Off 68
Hazard Solutions Other Precautions Maintenance/Storage 69
Hand Grinder Do's and Don ts 70
What Happened? 71
Exercise 72
Portable Power Drills 73
Portable Power Drill Hazards 74
Exercise 75
Portable Power Drill Solutions 76
Before You Pull The Trigger! 77
While Drilling! 78
More While Drilling! 79
Drilling Don ts
Portable Power Drill Exercise 81
Sawzalls 82
Sawzall Hazards 83
Sawzall Solutions 84
Before You Pull The Trigger! 85
While Sawing! 86
Sawzall Don ts
More Sawzall Don ts
Sawzall Exercise 89
Needle Gun 90
Needle Gun Hazards 91
Needle Gun Solutions 92
Before You Pull The Trigger! 93
While Needle Gunning! 94
Needle Gunning Don ts
Needle Gunning Exercise 96
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