Equipment identification:

Punch Press
Date :

POSITIVE CLUTCH (FULL REVOLUTION MECHANICAL PRESS)

For Occupational Health And Safety

• The slide action is controlled by a flywheel.
• It is impossible to stop the slide until the cycle has been completed.
FRICTION CLUTCH (PARTIAL REVOLUTION MECHANICAL PRESS)
• The slide action is controlled by a flywheel.
• It is possible to stop the slide before the cycle has been completed.

SELF-ASSESSMENT FORM
O HYDRAULIC MECHANICAL PRESS
• The slide action is controlled by hydraulic rams.
2, A D

3
1 4
5

B
F

6, C

Friction Clutch (Part Revolution

Mechanical Press) Parts Safety Devices
1 Frame A Flywheel Guard
2 Flywheel B Emergency Cut-Off Switch
3 Slide C Side- And Top-Capped Pedal Control
4 Die Shoes D Guard
5 Bed E Photo detector Security Screen
6 Pedal Control F Two-Hand Control

Association paritaire pour la santé

et la sécurité du travail Industrial Accident Prevention Association
Institut de recherche Robert-Sauvé
Secteur fabrication de produits en santé et en sécurité du travail 1-800-406-IAPA (4272)
en métal et de produits électriques www.irsst.qc.ca www.iapa.ca
www.aspme.org
 LEGEND
Preventative Measures Priority Codes for applying risk measures:
! Procedural Measures A. Immediate stoppage and resolution
" Orders/instructions B. Resolution as soon as possible
C. Resolution according to normal company procedures
The suggested preventative measures are based in part from the Occupational Health And Safety Regulations (RSST, S – 2.1,
r.19.01), from An Act Respecting Occupational Health and Safety (Quebec LSST-S-2.1), as well as CSA Standard Z142-M 90
and EN 954 -1

Priority

Mechanical Hazards Schedule

Most likely injuries: Crushing, fractures, cuts and foreign bodies. Designated Person

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Access To Danger Zone (die shoes)

On a Positive Clutch (Full Revolution Mechanical Press)
!Install fixed guards. ■
!Install moveable guards with an interlocking device that: ■
- neutralizes the slide controls when the guard is opened, AND
- maintains the guard in the closed position while the slide
is descending, AND
- does not provoke press start-up at guard closure.

!Install two-hand controls (only for presses with a stroke ■

rate of over 100 strokes per minute). The operator must
simultaneously depress both buttons to activate one
press stroke.
For automatic mode, add fixed or moveable guards.

!Install a clearly marked emergency stop button located ■

near each operator.

Risk Factor: Access To Danger Zone (die shoes)

On a Hydraulic or Friction Clutch (Part Revolution Mechanical Press)
!Install fixed guards. ■
!Install moveable guards with an interlocking device that: ■
- stops the slide controls when the ram descenter slide
descent is open and neutralizes the slide control when the
guard is open, AND
- maintains the guard in the closed position while the
slide is descending, AND
- does not provoke press start-up at guard closure.
!Install photo detectors approved for safety device use ■
(category 4).
!Install two-hand controls where: ■
- the operator must simultaneously depress both
buttons to activate one press stroke, AND
- the slide descent is halted as soon as the operator
releases one of the buttons..
For automatic mode, add fixed or moveable guards.

2
Mechanical Hazards (Continued)
Most likely injuries: Crushing, fractures, cuts and foreign bodies.

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Access To Danger Zone (Die Shoes)

On a hydraulic or Friction Clutch (Part Revolution Mechanical Press)
!Install safety devices (e.g., two-hand controls, etc.) at a ■
safe enough distance from the danger zone so that no one
can reach the danger zone before the slide has stopped.
!Install devices that maintain the workpiece in position relative ■
to the die shoes (or bolster plates) without the need of hands.
!Install a clearly marked emergency stop button located ■
near each operator.
Risk Factor: Involuntary Action On The Pedal Or Button Controls
!Install recessed or flush-mounted control buttons. ■

!Install a side and top-capped pedal control. ■

!Install as many controls as there are workers simultaneously ■
using the press. All workers must maintain their control
devices depressed to initiate a press stroke.
!Install a by-pass device in order to make any unused ■
control devices inoperative.

Risk Factor: Repeat Stroke

On a positive-clutch (full revolution mechanical press )
!Install a single-action mechanism that: ■
- deactivates the pedal, the lever, the hydraulic power control
unit or the control solenoid after each press stroke, AND
- stops the start of a new cycle until the end of the previous cycle.
!Install compression springs in the clutch mechanism. ■
These must be located around a rod or within a guide
and the space between the coils must be smaller than
the wire diameter.
!Replace defective parts by OEM parts. When this is not ■
possible, replace with parts that meet or exceed OEM
specifications. Using welded replacement parts in the
clutch is forbidden.

"Adjust the brake so the clutch does not knock nor make ■
ratcheting noises.
Risk Factor: Repeat Stroke
On a friction-clutch (part revolution mechanical press)
!Install an anti-repeat stroke device. ■
!Install a dual-body safety valve in the clutch-brake hydraulic ■
or pneumatic circuit.
!Add a second switch to the braking system. In case of ■
failure in one of the switches, the press trips in the top
dead centre position and a new cycle cannot be actuated.
Risk Factor: Repeat Stroke
On a hydraulic clutch mechanical press
!Install an anti-repeat stroke device. ■

3
Mechanical Hazards (Continued)
Most likely injuries: Crushing, fractures, cuts and foreign bodies.

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Accidental Selection Of Automatic Mode

!Indicate the function of all buttons and function ■
selector switches.
"Lock the selector in single stroke mode and remove the key. ■
Risk Factor: Accidental Descent Of The Slide During Start-Up
"Apply lock-out procedures: ■
- disconnect all sources of energy (except power supply
to pneumatic counterweight)
- dissipate (purge) all residual energies (except power supply
to pneumatic counterweight) and wait for the flywheel to
come to a complete stop
- lockout all sources of energy
- validate to ensure start-up is no longer possible and that all
power has been dissipated (purged).
•Place safety chocks between the slide and the bed.
Risk Factor: Access To Press Moving Parts
!Install fixed guards around moving parts: flywheel, belts, ■
gears, counterweights, etc.

Risk Factor: Flying Particles Or Fragments (Slivers)

Keep the die shoes safe from cracking:
"properly adjust the clearance at the time of tooling up the ■
die shoes.
"Properly secure the die shoes on both the slide and ■
the bed.
Avoid an overload situation when more than one workpiece
is fed at a time.
!Install a workpiece ejection system or a stripper plate to ■
keep workpieces from adhering to the die shoes.

!Install a detection device to monitor workpieces and ■

waste movement during automatic feed mode.
"Use grasping tools made of soft metal ■
(e.g., aluminum or magnesium).
"Wear CSA-approved safety glasses with lateral protection. ■

Risk Factor: Handling Non-Deburred Plates

"De-burr plate workpieces ■
"Wear cut-resistant gloves. ■
Risk Factor: Falling Metal Plate
" Wear CSA-approved safety footwear with steel-capped ■
toes and steel upper plate.

4
Ergonomic Hazards
Most likely injuries: Musculo skeletal disorders, backaches, fractures, strains and sprains, etc.

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Handling Heavy And Bulky Workpieces

!Supply mechanical handling devices (hoist, suction cups, etc.) ■
suitable to the weight and dimensions of the workpiece.
Install equipment:
!to aid the feeding of workpieces, such as roller conveyor, ■
roller-ball table, trestles, elevating table, etc.
!to assist in removing workpieces, such as a gently sloping ■
surface or motorized conveyor.
"Ask for help from another worker when help is needed. ■
Risk Factor: Straining Working Positions and Repetitive Movements
!Supply reclining baskets, elevating tables or receptacles to ■
assist in accessing workpieces.
!Install a system of springs or air jets to assist in the ■
removal of pressed pieces.
!Install an adjustable stand to enable work height adjustments. ■

Risk Factor: Strain During Tooling and Re-Tooling Of Die shoes

!Supply a dolly with lift table. ■
!Install a retooling system with retractable roller or ■
ball tracks in the bed.
Risk Factor: Insufficient Lighting
!Install sufficient lighting to ensure good visibility in ■
the work area
Risk Factor: Static Standing Work
!Supply appropriate seating if suitable for such work. ■
!Supply anti fatigue mats. ■

Chemical Hazards
Most likely injuries: Dermatitis, respiratory tract irritation.

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Exposure To Lubricants

"Consult the MSDS for the products in use. ■
!Select lubricants that have little effect on health ■
(skin and respiratory tracts).
"Reduce lubricant spray as much as possible. ■
!Collect air samples at workstations in order to evaluate the ■
concentration of toxic substances.
"Wear gloves that are approved for the products used. ■
Ensure the gloves are also cut resistant and provide good
grip to workpieces.
"Use barrier lotions. ■

5
Physical Hazards
Most likely injury: Hearing loss.

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Impact Noise

!Hone the die shoes frequently. ■
!Install acoustic batting or screens around the noisy ■
sections of the press.
!Install vibration isolators under the press chassis. ■
"Wear earplugs or earmuffs. ■
Risk Factor: Noise From Air Nozzles
!Install sound dampers on pneumatic valve nozzles. ■
!Install silent-type air ejectors for removal of machined ■
and waste pieces.

Electrical Hazards
Most likely injuries: Electrocution

Preventative measures Applicable ■

✔ Not applicable ■
N/A Notes Desig. Sched. Prior.

Risk Factor: Contact With Parts Normally Or Accidentally Energized

!Install an isolating switch near the punch press, ■
with clear markings.
"Apply lock-out procedures: ■
- disconnect all sources of energy
- lockout all power supply
- validate to ensure start-up is no longer possible.
"Never lockout an isolation switch in the ON position. ■
The isolating switch must open the circuit (circuit in the
OFF position) at all times.
!Install control devices powered by very low voltage ■
(30 volts or less).
"Check the power supply cables insulation and the punch ■
press grounding circuit.

Notes:

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