Makino V55 Operating manual
4V2B1563 (E) i
V55 High-speed Vertical
Machining Center
with Makino Professional 3 Control
Maintenance Guide
This guide is intended for use by Makino customers and Makino employ-
ees and assigns for the safe operation and maintenance of Makino equip-
ment.
This guide was developed through the combined efforts of:
Makino R&D Groups - FujiKatsuyama Japan
Makino Documentation Group - Mason USA
TM & Associates (Thos Mercer)
MBS Associates (Lynne Hays & Mark Hebbeler)
Makino Customer Support (Randy Ashley)
1st Release Date: April 1 1999
Revision(s) Date:
1. Revision B 6/21/99 Typos and DI # 4v-0865
Copyright © 1999 Makino, Inc. All Rights Reserved
• No part of this manual may be reproduced or transmitted by any means or in any
form to parties other than which it is intended, without the expressed written
permission of Makino.
• All specifications and designs may change without notice.
Every attempt was made to ensure that the information in this publication was correct at
the time of printing. As specifications and designs change, Makino is not responsible for
information that becomes incorrect or inaccurate after publication.
ii
The followin
g
icons are used in this document. Safety and precautionary
statements are presented as shown below.
• Precautionary statements must be followed to prevent personal injury
or dama
g
e to the machine.
• In addition, all safety requirements and
g
uidelines found in Chapter 1 -
Safety, the ANSI safety
g
uidelines the Makino Safety Manual, shipped
with the machine, and established company safety requirements and
re
g
ulations must be followed. Takin
g
personal responsibility for safety
will prevent most accidents.
Notes are presented usin
g
the followin
g
icon format
A copy of the ANSI Safety Manual, ANSI document number ANSI B11.8 was shipped
with the machine. If this manual was lost or misplaced, another copy can be obtained
from Makino at no charge.
A DANGER icon precedes each dan
g
er statement. A DANGER icon
indicates an existin
g
hazardous condition with a hi
g
h probability of death
or severe injury. Precautions must be taken immediately to prevent per-
sonal injury or death.
A WARNING icon proceeds each warnin
g
statement. A WARNING icon
indicates a potentially hazardous situation with some probability of death
or serious injury. Precautions must be taken immediately to prevent per-
sonal injury.
A CAUTION icon proceeds each caution statement. A CAUTION icon
indicates a potentially hazardous situation with some probability of per-
sonal injury or dama
g
e to the machine. Precautions must be taken
immediately to prevent personal injury or machine dama
g
e.
A NOTE icon indicates information that expands on information
g
iven or
indicates where additional infromation can be found. Notes are pre-
sented immediately followin
g
the applicable content.
Write us at: Call or FAX us at:
Makino
P.O. Box 8003
7680 Innovation Way
Mason Ohio, 54040-8003
Attn: Information Services
Phone: (513) 573-7200
ask for Information Services
FAX: (513) 573-7360
Attn: Information Services
4V2B1563 (E) iii
To contact Makino, for service after the sale:
or contact us on the World Wide Web at: www.makino.com
Makino
7680 Innovation Way
Mason, Ohio 45040
USA
Technical Support Services (888) Makino4 (625-4664)
Mon.-Fri. 7:00 a.m. to 8:00 p.m.
Sat. 8:00 a.m. to 2:00 p.m. (Eastern Standard Time) Fax: (513) 459-1825
Parts Express (888) Makino1 (625-4661)
24 hours, 7 days a week Fax: (888)-881-9289
Training Services (888) Makino1 (625-4661)
iv
AVISO!
Las personas que no pueden leer o entender en Ingles deben mandar traducir este
manual y solicitar entrenamiento antes de operar o mantener la maquina. Todos los
que trabajen en esta maquina deberan saber como operarla con toda seguridad y en
forma correcta para evitar un posible dano.
ATTENTION!
Les personnes ne sachant pas lire l'anglais devront se faire lire et expliquer le manuel
avant d'utiliser ou de faire l'entretien de la machine. Toute personne travaillant sur la
machine doit savoir comment l'utiliser sans danger et correctement afin d'eviter tout
accident.
HINWEIS
Alle Personen die nur Teile des Handbuches oder kein Englisch verstenen, müssen
sich dieses Handbuch erklären lassen, bevor sie die Maschine in Betrieb nehmen
oder instandhalten. Alle Personen, die an der Maschine arbeiten, müssen zur Vermei-
dung von Verletzungen zur korrekten Handhabung angeleitet werden.
WARNING!
Persons unable to read English or do not understand any part of this guide, must have
this guide read and explained to them before operating or maintaining the machine.
Everyone working on the machine must know how to operate and maintain it safely
and correctly to prevent possible serious injury.
4V2B1563 (E) v
Chapter 1 Safety Precautions
Chapter 2 Specifications
Chapter 3 Preventive Maintenance
Chapter 4 Machine Tool System Overview
Chapter 5 Troubleshooting
Chapter 6 Spindle Head Unit
Chapter 7 Feed Axis Unit
Chapter 8 A25 ATC (Automatic Tool Changer) Unit
Chapter 9 Oil Controller
Appendix A Alarms
Appendix B Machine Diagnostics
vi
4V2A1563 (E) 01-4va Safety.fm
Makino V55 High-speed Vertical
Machining Center
Chapter 1 Safety Precautions
For a Safe Working Environment
4V2A1563 (E)
Chapter 1
Safety Precautions
Contents
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
1.2 General Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 1
1.2.1 Danger, Warning, Caution Statements and Symbols . . . . . .1 - 2
1.2.2 Access to Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 4
1.2.3 Point-of-operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 4
1.2.4 Lockout/Tagout Procedure . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 5
1.3 Personal and Professional Safety . . . . . . . . . . . . . . . . . . . . . . . .1 - 6
1.4 Equipment and Operation Safety. . . . . . . . . . . . . . . . . . . . . . . . .1 - 7
1.5 Environmental Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 10
1.6 Lifting Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 11
1.6.1 Slings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 11
1.6.2 Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 11
1.6.3 Hooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 12
1.6.4 Eye Bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 12
1.6.5 Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 12
1.6.6 Lifting the Machine or Components . . . . . . . . . . . . . . . . . .1 - 13
1.6.7 Lifting Workpieces and Fixtures . . . . . . . . . . . . . . . . . . . . .1 - 13
1.7 Mechanical Maintenance Safety . . . . . . . . . . . . . . . . . . . . . . . .1 - 14
1.8 Electrical Maintenance Safety . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 15
1.9 V55 Vertical Machining Center Safety . . . . . . . . . . . . . . . . . . . .1 - 16
1.9.1 Machine Safety Features . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 16
1.9.2 Location of Emergency Stop Buttons . . . . . . . . . . . . . . . . .1 - 16
1.9.3 Location of Safety Labels . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 16
1.10 Tooling Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 19
1.11 Equipment and Operation Safety. . . . . . . . . . . . . . . . . . . . . . .1 - 21
1.12 Coolant Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 22
1.13 Installation Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . .1 - 23
1.14 Required Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 - 23
4V2A1563 (E) 1 - 1
1.1 Overview
This chapter provides proven
g
eneral safety
g
uidelines that, if followed,
promote a safer workin
g
environment. It also contains safety information
specific to the V55.
All machinin
g
centers have inherent hazards the manufacturer either
desi
g
ns out,
g
uards a
g
ainst, or warns about. Even thou
g
h the manufac-
turer has this responsibility, the machine user has ultimate responsibility
to ensure that a safe workin
g
environment is maintained in and about the
machinin
g
center. This includes, but is not limited to, allowin
g
only prop-
erly trained and technically qualified personnel to pro
g
ram, operate and
maintain the machinin
g
center.
It is Makino’s policy and responsibility to desi
g
n, manufacture, and market
machinin
g
centers that are as reasonably safe as possible for their
intended use.
1.2 General Safety
Safety precautions or requirements discussed in Makino
g
uides or manu-
als do not supersede any safety requirements imposed by local, state, or
federal
g
overnments. All
g
overnment-imposed
g
uidelines, i.e. OSHA
(Occupational Safety and Health Administration), NEC (National Electric
Code), NFC (National Fire Code), ANSI (American National Standard
Institute) standards, shall take precedence.
To protect a
g
ainst injury or dama
g
e operate the machinin
g
center within
the
g
uidelines described in the provided documentation. Consider
Makino’s safety precautions supplemental to:
• Other Makino supplied
g
uides or manuals related to pro
g
rammin
g
,
operation, and maintenance of this specific machinin
g
center.
• Your company’s safety rules and re
g
ulations.
• All local, state, and federal re
g
ulations.
Your particular application may require additional safety measures to
ensure proper operator safety.
Additional copies of any
g
uide or manual provided with your Makino
machinin
g
center may be purchased from Makino.
1 - 2
Prior To Installation, Operation, or Service,
Do NOT attempt to install, operate, or service this machinin
g
center until:
• You have read and understand the safety instructions contained in this
g
uide.
• You have read and understand all dan
g
er, warnin
g
, and caution safety
labels attached to the machinin
g
center and its related equipment.
• You have read and understand all technical information, includin
g
the
followin
g
sections of this safety chapter.
Questions Regarding Safe Operation
Before you operate this machine – contact your Makino service
g
roup for
answers to any questions about safety and your Makino machine.
1.2.1 Danger, Warning, Caution Statements and Symbols
It is important that all employees reco
g
nize each safety symbol on the
machine and understand the meanin
g
of dan
g
er, warnin
g
, and caution.
These safety labels must never be removed, covered or painted over, and
must be replaced if they are dama
g
ed, defaced, or become unreadable.
Table 1-1 presents the meanin
g
of each safety statement. It is important
that all employees reco
g
nize and understand the meanin
g
of the safety
symbols shown in Table 1-2.
The location of safety labels for specific hazards on the V55 is described
in section 1.9.3 (pg 1-16).
4V2A1563 (E) 1 - 3
TABLE 1-1 DEFINITION OF DANGER, WARNING, AND CAUTION STATEMENTS
Statement Meaning
DANGER DANGER is the most severe safety statement. This statement
means that either severe personal injury or death may result if the
instruction(s) is not followed.
WARNING WARNING is the next level of safety statement. It indicates that if
the instruction(s) is not followed severe personal injury could
result.
CAUTION A CAUTION is the least severe safety statement and indicates that
if the instruction(s) is not followed damage to the equipment may
result.
TABLE 1-2 SAFETY SYMBOL SHAPES AND THEIR MEANING
Symbol Meaning
A triangle or diamond shaped safety symbol indicates a hazard
exists in the area or behind the enclosure where the symbol is
placed.
The symbol at left indicates an electrical shock hazard exists.
A solid colored circle shaped safety symbol with an icon inside
indicates the action shown by the icon is mandatory.
The symbol at left indicates that safety glasses be worn.
A square shaped safety symbol is used to convey information
relative to the area where the symbol is placed.
The symbol at left indicates the area is hot.
A circle shaped safety symbol with a diagonal slash across the
image indicates the action shown is prohibited in or around that
area.
The symbol at left indicates that smoking is not allowed in the
area.
1 - 4
1.2.2 Access to Information
We stron
g
ly recommend that a copy of these safety instructions and all
provided
g
uides, manuals, and technical information be kept near the
machine. This information should be or
g
anized for quick access and use
by operators, maintenance, and other personnel with duties related to the
machinin
g
center.
Access to this information:
• May save a life.
• Will prevent or reduce injury, mis-operation, and machinin
g
center
dama
g
e.
• In the event that parts of this information become dama
g
ed or
unusable replace them immediately.
1.2.3 Point-of-operation
“Point-of-operation” should be safe
g
uarded to the
g
reatest extent possible
for all machinin
g
operations.
In addition to panel locks, interlocks, and
g
uardin
g
; certain areas of the
machinin
g
center are color coded for safety. It is important that the ori
g
inal
color and vividness of these areas be maintained.
Different operations or applications may make the
g
eneral purpose safe-
g
uards unsuitable and require additional safe
g
uards. You and your com-
pany are required to use special safe
g
uards in these situations.
To assist in desi
g
nin
g
point-of-operation safe
g
uards for specific machin-
in
g
center applications:
• OSHA has published a booklet called OSHA Publication No. 3067.
• Films re
g
ardin
g
safety requirements for machine tools are available
from ANSI and trade
g
roups such as NMTBA (National Machine Tool
Builders Association).
4V2A1563 (E) 1 - 5
1.2.4 Lockout/Tagout Procedure
The machinin
g
center is powered by hi
g
h volta
g
e and other ener
g
y
sources that represent potential hazards. To reduce the risk of injury or
death establish, define, and practice a Lockout/Ta
g
out procedure for the
equipment in your facility.
Lockout/Ta
g
out defines a minimum safe procedure to be followed by per-
sons who mi
g
ht be confronted with unexpected ener
g
izin
g
, start-up, or
release of stored ener
g
y that could cause injury or death. At a minimum,
all Lockout/Ta
g
out procedures should include:
1. Set the machine’s Main Power switch to the Off position.
2. Affix a DO NOT START ta
g
with your name and department at, on, or
near the machine’s Main Power switch, until all repairs are complete.
3. Turn the Main Power disconnect to the Off position.
4. Install an industry approved lockout device throu
g
h the Main Power
disconnect handle.
5. Install a tamper-proof padlock onto the lockout device. All persons
performin
g
maintenance on the machine at the same time shall install
their own padlock onto the lockout device.
6. Disconnect the main power of all power sources (i.e. electrical, air,
hydraulic, etc.).
Use the Lockout/Ta
g
out policy and procedures defined by your company.
If no Lockout/Ta
g
out procedure has been communicated to you, please
ask your supervisor to provide and explain one or obtain copies of stan-
dards to develop and implement lockout/ta
g
out in your plant.
• ANSI has issued a standard to assist in the desi
g
n and development of
a Lockout/Ta
g
out policy. It is written as a
g
uide to follow when
determinin
g
the specific procedures and trainin
g
necessary and
appropriate to your plant operations.
- Copies of the ANSI standard are available from ANSI at 1430
Broadway, New York, NY 10018, ask for: Standard ANSI Z244.1-
1982, or as modified, for personal protection - Lockout/Ta
g
out Of
Ener
g
y Sources - Minimum Safety Requirements.
Electrical Shock Hazards Exist - Work Safely
Failure to turn the Main Power disconnect to the Off position, lock it out, and tag it
could result in severe personal injury or death.
1 - 6
1.3 Personal and Professional Safety
General safety precautions should be practiced everyday, but never
become common place. Safety is the responsibility of every person on the
job site. In this re
g
ard, consider yourself responsible for safety in your
workplace. No one is better positioned to eliminate or prevent unsafe con-
ditions than you. Each employee should practice the followin
g
, re
g
ardless
of their position, title, or labor
g
rade:
• Approach and intercede anytime you witness unsafe procedures.
• Be prepared to report any condition which seems unsafe to your
company’s safety department or any supervisory or mana
g
ement staff.
It could save lives. In particular report such thin
g
s as:
- Missin
g
or defective
g
uards and protective devices.
- Leaks and spills of cuttin
g
fluid, lubricants, or any liquids.
- Improperly stored chemicals or flammable materials and any
unusual fumes.
- Loose, worn, or broken floorin
g
.
- Slippery, broken, or unstable platforms.
- Missin
g
, broken, or unstable handrails.
• Avoid makin
g
sudden movements, loud noises, en
g
a
g
in
g
in horseplay,
or other activities that may prove distractin
g
and result in an unsafe or
dan
g
erous work environment. Remember, that around machinery, it
only takes a second’s inattention to result in personal injury or death.
• Observe and obey all si
g
ns posted on the machinery and its
components and si
g
ns placed by your company, like:
- NO SMOKING
- SAFETY GLASSES MUST BE WORN WHILE OPERATING THIS
MACHINE
- DANGER - HIGH VOLTAGE, etc.
• Wear appropriate safety equipment as defined by OSHA, the
equipment manufacturer, your company safety policy, or MSDS
(Material Safety Data Sheet). Always wear approved eye protection
and other safety equipment to meet the demands of current conditions
while operatin
g
or workin
g
around the machinin
g
center.
• Clean up any oil or other liquid spills immediately.
4V2A1563 (E) 1 - 7
• Obtain an MSDS for each chemical (such as cuttin
g
fluids, lubricatin
g
oils,
g
reases, etc.) used on or around the machinin
g
center. Practice
safe workin
g
habits and wear all protective equipment required. Know
and understand the procedures to follow in the event:
- Your skin is exposed to the chemical.
- Your eyes are contacted by the chemical.
- You in
g
ested or inhaled the chemical.
1.4 Equipment and Operation Safety
We ur
g
e that all machinin
g
centers be operated, equipped, and cared for
in strict compliance with all local, state, and federal safety re
g
ulations. The
followin
g
safety requirements apply to all machinery and should be prac-
ticed in addition to machine specific safety
g
uidelines.
• Do not ne
g
lect your responsibility to ensure that all machinin
g
centers
are operated, maintained, and equipped with complete re
g
ard for
operator safety.
Only qualified personnel, trained in safety and all machinin
g
center func-
tions should be allowed to operate, maintain, or repair the machine.
To be considered qualified, all personnel whose duties are related to the
operation, maintenance, or repair of the machinin
g
center should:
• Be made familiar with the location and operation of the
[EMERGENCY] buttons (E-Stop).
• Study the related
g
uides or manuals prior to attemptin
g
to operate,
maintain, or repair the machine. A recommended readin
g
list by job
type for your machine model is provided in section 1.14.
• Locate and understand all dan
g
er, warnin
g
, and caution labels on the
machinin
g
center and accessories.
Machinin
g
centers are desi
g
ned for operation by one person at a time.
• Persons other than the desi
g
nated operator should stay out of the area
durin
g
operation.
• Unauthorized personnel may increase the potential for injury or
dama
g
e due to inattentiveness.
1 - 8
Be sure to Always:
• Take steps to protect the machine tool and control cabinets from
moisture and condensation. Moisture can dama
g
e electrical
components, causin
g
unwanted machine motion, leadin
g
to injury or
machine dama
g
e.
• Maintain the exact ori
g
inal color and vividness of any machinin
g
areas
that are color coded as safety precautions.
• Ensure that all shields and
g
uards are in place and all covers, cabinet
doors, and terminal boxes are closed prior to operation.
• Avoid accidentally bumpin
g
or touchin
g
any machine controls, as this
may cause unintended machine motion causin
g
injury or machine
dama
g
e.
• Be alert for loose, dama
g
ed, or worn parts on the machine and
associated equipment. Immediately correct or report any; loose items,
noticeable chan
g
e in operatin
g
noise, or any unusual machine action.
• Be aware of the machine and auxiliary component’s movin
g
members
and ran
g
e of movement which may create pinch points. Always be
cautious of these areas. Avoid pinch points entirely durin
g
machine
operation.
• Keep the machinin
g
center properly maintained. Perform maintenance
at prescribed intervals, as described in the Maintenance Guide.
Machinin
g
center maintenance should be performed only by
authorized individuals.
• Check the level of each fluid reservoir periodically. Add fluids, if
needed, as described in the Maintenance Guide. Use only
recommended lubricants.
• Keep the machinin
g
center clean. Keep the work area clear of chips,
ra
g
s, etc. Cleanin
g
should be performed, at least, daily.
• Keep away from the ATC (Automatic Tool Chan
g
er), APC (Automatic
Pallet Chan
g
er), and other exchan
g
e devices while the machine is in
automatic operation.
• Double check the set up, toolin
g
, and workpiece before power up.
• Check all clamp bolts for ti
g
htness and verify the accuracy of all set
ups before restartin
g
machinin
g
operation.
• Use caution when handlin
g
workpieces, after machinin
g
. Machinin
g
can produce sharp ed
g
es and at times considerable heat.
4V2A1563 (E) 1 - 9
You should:
• Never wear loose-fittin
g
clothin
g
or accessories that may be entan
g
led
in cuttin
g
tools, revolvin
g
parts, conveyors, or other machine
components. In particular, never wear any of the followin
g
items when
workin
g
in a shop environment:
- Jewelry (rin
g
s, bracelets, watches, or necklaces) and accessories
(necktie, scarf, or loose fittin
g
belt)
- Lon
g
hair (tie it back and contained under a hair net or cap)
• Never operate any machinery after takin
g
stron
g
medication, usin
g
nonprescription dru
g
s, or consumin
g
alcoholic bevera
g
es.
• Do not make modifications to the machine or associated equipment
that may reduce the operational safety of the device such as:
- Never paint, alter, deface, or remove any dan
g
er, warnin
g
, or cau-
tion label. (Replacement labels are available from Makino)
- Never chan
g
e or by-pass the location of the stroke limit do
g
s, limit
switches, interlock circuitry, etc.
- Never operate the machine with any safety device disabled or
removed or any cover open or removed
• Do not allow yourself to become trapped or cau
g
ht in pinch points:
- Always be aware of a safe exit, when in or around any type of
equipment. Know the travel limits of the machinin
g
center and
always keep all body parts clear of movin
g
components.
- Never enter an area restricted by a barrier without first properly
shuttin
g
down the equipment and lockin
g
out the power sources to
prevent its bein
g
restarted.
- Never perform any set up, set up check, reach into the work area,
or across movin
g
parts while the machine is in automatic operation.
- Never chan
g
e a workpiece or perform a manual operation on a
workpiece while the machine is in automatic operation.
• Never activate or press any button or other operatin
g
control unless
you are trained on the operation of that device, machine, or equipment.
• Never apply excessive pressure or force to tools or tool holders while
they are positioned in the spindle.
• Never use compressed air to clean or blow chips or dirt off the table,
workpiece, or the machinin
g
center.
1 - 10
1.5 Environmental Safety
Follow these specific practices when workin
g
at the machinin
g
center:
• The area around the machine should be well li
g
hted, dry, and free from
obstructions. Keep the area around the machine clean and in
g
ood
order at all times.
• Equipment should not be operated durin
g
severe thunderstorms or
other electrical disturbances.
• In the event of a power failure, turn the Main Power switch Off
immediately. Leave the switch in the Off position until the power is fully
restored and normal operations can safely be resumed.
• Never step on machine covers as they can become slippery durin
g
normal operation and are not desi
g
ned to support your wei
g
ht.
• Never perform
g
rindin
g
operations in the vicinity of the machinin
g
center. The dust created by
g
rindin
g
can contaminate components,
cause premature wear, and cause inaccuracies or component failure.
• Never weld on parts mounted on or in the machine. Electrical currents
associated with weldin
g
could cause bearin
g
dama
g
e or explosions
and result in serious injury or equipment dama
g
e.
• When a platform is placed around the machinin
g
center, it should be
extremely sturdy, safe, and have anti-slip surfaces.
• Keep all flammable liquids away from the work area.
4V2A1563 (E) 1 - 11
1.6 Lifting Safety
These liftin
g
safety precautions must be followed by all persons responsi-
ble for liftin
g
. This includes, but is not limited to liftin
g
machinery, machine
components, and workpieces:
• All liftin
g
equipment must be properly rated for the wei
g
ht bein
g
lifted.
• All liftin
g
equipment must be inspected on a re
g
ularly scheduled basis.
• Any liftin
g
device found to be defective must be repaired in accordance
with industry standards.
• Any liftin
g
device that cannot be repaired must be destroyed.
1.6.1 Slings
Use nylon slin
g
s when liftin
g
irre
g
ular shape objects and:
• Never exceed the liftin
g
capacity of any slin
g
.
• Protect slin
g
s with heavy paddin
g
when liftin
g
objects with sharp
ed
g
es.
1.6.2 Chains
Liftin
g
chains must be stored properly to prevent dama
g
e when not in use.
When usin
g
chains:
• Never exceed the liftin
g
capacity of any chain.
• Do not dra
g
chains.
• Do not allow chains to become tan
g
led or kinked.
• Never twist chains in an attempt to shorten their len
g
th. Use proper
devices to shorten a chain’s len
g
th.
• Use chains equipped with enclosed liftin
g
hooks.
1 - 12
1.6.3 Hooks
When usin
g
hooks:
• Never exceed the liftin
g
capacity of any lift hook.
• Do not repair liftin
g
hooks.
• Destroy and discard bent liftin
g
hooks.
1.6.4 Eye Bolts
To ensure a safe load carryin
g
capacity:
• Never exceed the liftin
g
capacity of any eye bolt.
• An eye bolt must be en
g
a
g
ed to at least 90 percent of its threaded
portion.
• Never weld or heat an eye bolt to a temperature in excess of 480° C
(900° F). Heat exposure can chan
g
e the physical properties of the
stock and create an unsafe eye bolt.
• Never use an inch eye bolt in a metric thread or vice versa:
- Use inch series thread eye bolts in inch series threads.
- Use metric series thread eye bolts in metric series threads.
• Never use a painted or coated eye bolt as this may cover up defects.
• Discard and destroy any defective eye bolts.
1.6.5 Rings
When possible use a liftin
g
rin
g
or clevis instead of an eye bolt. Secure the
liftin
g
rin
g
with the correct inch/metric series bolt.
• Never exceed the liftin
g
capacity on any liftin
g
rin
g
or clevis.
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