1

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

6

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.

Your Risk Exercise

Where Mechanical Hazards

Occur

Point of Operation

Power Transmission Device

Other Moving Parts

Controls

Hazards to be Guarded

Motions

Rotating - Gears

Transverse Motion - Belts

Reciprocating - Table

In-Running Nip Points

Rotating - Gears Reciprocating - Table

Action

Cutting – Band Saw

Bending – Bending Machine

Punching – Metal

Punch

Shearing – Shearing

Machine

Exercise

13

Applicable Regulations

Machine Guards and Devices

Machine Guards –

Fixed and Interlocked

Fixed

Interlocked

Machine Guards –

Adjustable and Self-Adjusting

Adjustable Self-Adjusting

Bandsaw blade

Circular table saw

Exercise From a safety perspective identify the pros and cons of

each type of guard below.

18

Guarding Devices –

Presence Sensing and Pullback

Pullback

Presence sensing device Cables

attached to

operator’s

hands or

wrists

Removes

hands from

point of

operation

during

danger

period

Guarding Devices –

Restraint and Safety Controls

Restraint

Safety Controls

Safety Cable

Guarding Devices –

Gates and Two-Handed Controls

Gates Two-Handed Controls

Safeguarding by Location and

Distance

Exercise

1

2

3

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

97