Cooper Tools Campbell GXL Manuale utente
Campbell®
Lifti g Clamps
Operator’s Ma ual
1
GX Clamp
SAC Clamp
E Clamp
GXL Clamp
Campbell®Lifti g
Clamps Overview
Campbell clamps (formerly Merrill®) are known and used
throughout the world for lifting, conveying and positioning
of sheet, plate, weldments and structurals. Within their
capacity, the heavier the load, the tighter they grip. Parts
are drop forged for strength, dependability and long life,
and all clamps are individually proof tested. Replacement
parts are available when needed. If you have any doubts
as to the clamp best suited to your application, contact
your Cooper Tools distributor.
Model “GX” Clamp
Plate Clamp with Screw-
adjusted Cam (SAC) Locking “E” Clamp
2
Table of Co te ts
Applications.................................................................. 4
Operator Guidelines for Safer Material Handling .. 5 - 7
Definitions ............................................................ 8 - 10
Clamp Specific Operating Instructions
GX Clamp ................................................................ 11
GXL Clamp .............................................................. 11
GXRPC Clamp .......................................................... 12
Horizontal Plate Clamp............................................ 12
E - Clamp ................................................................ 13
SAC Clamp .............................................................. 14
Single Drum Lifter .................................................. 14
Twin Drum Lifter...................................................... 15
Hand Grips .............................................................. 15
Clamp Inspection, Maintenance, and Repair .... 16 - 18
Prior to selection, operation and/or maintenance of
Campbell®Clamps, read and understand the information
provided in this manual and Campbell’s Lifting Clamp
Product Warning Manual, Cooper No. 550696.
The understanding and use of Definitions are important
in determining the limitations and proper applications of
lifting clamps.
Failure to review and utilize recommended applications,
operation and maintenance instructions may result in
serious injury to operator and others.
THIS PUBLICATION SUPERSEDES ALL PREVIOUSLY
PUBLISHED AND/OR DISTRIBUTED INFORMATION BY
MANUFACTURER AND/OR ITS DISTRIBUTORS WITH
RESPECT TO APPLICABLE CAMPBELL (PREVIOUSLY
MERRILL) LIFTING CLAMPS AND SUB ECT MATTER
DESCRIBED OR CONTAINED HEREIN.
3
WARNING:
4
Applicatio s
Campbell®clamps may be used for various applications.
• Lifting, turning over and transfer of steel plates:
Model GX (no turns for GX Sharp Leg)
Model GXL
Model SAC
• Vertical lifting and transfer of steel plates:
Model E
• Lifting, turning and mounting of wide flange beams
and shape steel:
Model GX Structural
Model GXL
• Horizontal lifting and positioning of steel plates:
Model H
• Vertical lifting and turning of hard or polished
plates:
Model GXRPC
• Lifting stacked plates from horizontal to vertical
position:
Model GX Sharp Leg
• Hand or conveyer carry of light plates ans shape
steel:
Duplex Hand Grip
• Lifting and transfer of drums:
Single Drum Lifter
Twin Drum Lifter
5
Operati g Guideli es for
Safer Material Ha dli g
1. The Number One Guideline for Safe Material Handling
is to STAY CLEAR OF THE LOAD WHEN LIFTING! The oper-
ator should stand clear of load and should never lift over
people or machinery.
2. now the application. Before using any Campbell
clamp, refer to the application section of this manual to be
sure the lift to be made is appropriate for this style clamp.
3. Determine the weight of the load.
Every Campbell clamp has its rated
weight capacity and grip range forged
or stamped into the body. Always use
a clamp with a grip and lifting capacity
in excess of the thickness and weight
of the plate or member being lifted.
Match the clamp to the load. Don’t use a big clamp lift a
small load.
4. Inspect clamp before each lift. Refer to the maintenance
and inspection pages of this manual for details.
a. Check the cam and pad for excessive wear. If one of
the gripping components is approaching the
maximum allowable wear, it is recommended that both
the cam or pad be replaced. Always ensure that the
teeth of the cam and pad are not clogged with dirt
and/or foreign material.
b. Check the shackle and visible linkage to be sure they
are not bent or excessively worn. If so, replace them.
Do not try to straighten any bent com-
ponent. Replace it. Do not use any clamp in need of repair, or
that has been overloaded.
5. Use only the manufacturer's recommended
replacement parts.
WARNING:
6. Do not lift more than one plate
at a time with any clamps other
than horizontal plate clamps.
7. Position the clamp to balance
the load. Position the clamp so
the lifting force exerted by the
crane is directly in line with the
iifting shackle and the load
is evenly distributed.
Beware
of side loading. Never
exceed an angle of
10° from vertical
when using a clamp
(20% is allowable for
SAC clamps). Use at least two clamps and a spreader
bar when lifting long plates or shapes. Do not exceed
the combined WLL of two clamps when using two or
more clamps.
8. Insert plate to full depth of throat opening. It is
imperative that the cam and pad have maximum
contact on the plate to insure a good firm grip on
the plate being lifted.
9. Lift slowly and smoothly.
Do not jerk load. Shock
loading can damage
the clamp.
Great care
should be taken to not
bump or lessen the load on the cam, which may
cause clamps to release.
NO!
6
WARNING:
WARNING:
7
10.Never alter a clamp. Clamp manufacturer’s specifi-
cations include specific materials and manufacturing
procedures. Never grind, weld or in any way alter clamp,
as this could cause severe damage or failure.
11. Do not misuse a clamp.
Never lift a plate from
the bottom of a stack.
Never lift horizontally
using a vertical lifting
clamp. Do not improvise.
12. Never attach a clamp directly to the crane hook.
Use a sling between the crane hook and clamp to
minimize interference in clamp operation and its
ability to maintain a proper position in the plate.
13. Never tamper with the locking mechanism of a
locking clamp while making a lift. Always use in “lock
closed” position.
14. Always place pad side (short leg) of clamp under
plate when turning plates from horizontal to vertical
with clamps other than the “GX” models.
15. now the type of material to be moved before
making lift. Some exotic steels are too hard to
allow teeth of cam to penetrate. This may also be true
of structural members and fabricated sections. If
plates hardness exceeds 400 Brinell, use a
non-marring clamp only.
16. Do not lift plates that are coated with any
substance such as plastic, paint or greese that would
interfere with the cam and/or pad teeth obtaining a
good grip on the plate.
17. Do not lift tapered beams or members other than
ordinary structural steel.
NEVER!
Defi itio s
1. Vertical lift: The lifting
of a vertical plate or
member in which the
lifting force exerted by
the rigging is evenly
distributed and is direct-
ly above and in line with
the clamp’s lifting shackle. Ths is illustrated above.
2. Vertical turn/lift: A
vertical turn/lift clamp is
one designed to turn a
single plate or member
from horizontal to vertical
through a 90° arc; or
from horizontal to vertical
to horizontal through a 180° arc.
3. Horizontal lift: Multiple clamps are attached to the
sides of a horizontal plate. The clamps are attached
to a multi-leg sling centered over the plate. Refer to
illustrations. The capacity of all horizontal clamps
is based on a sling angle of 60°. See illustration
(right). Sling angles less than 60° increase the
load exerted on the clamps.
Horizontal
clamps are rated in pairs. One
half of the rated capacity is
the maximum allowable load
for one clamp.
4. Finished and polished plates: Steel plates such as
stainless which have other than hot rolled surfaces
are generally handled with non-marring clamps having
at least one smooth gripping surface. Extra caution
is therefore required.
LIFTING SHAC LE
LIFTING FORCE
CLAMP
PLATE OR
MEMBER
8
WARNING:
WARNING:
5. Structural members and fabricated sections:
Unless otherwise specified, clamps recommended
for structural members and fabricated sections are
limited to hot rolled steel products with a Brinell
hardness not exceeding 400. For other or unusual
applications, contact Cooper Tools for lifting
recommendations.
6. Rated capacity: The rated capacity of a Campbell
clamp is based on a clamp in "new" or “as new”
condition. It represents the maximum load the
product is to be subjected to when used in a
manner described in this manual. Wear, misuse,
abuse and other factors relating to usage may
reduce the rated capacity. Shock loading and the
factors listed above must be taken into consider-
ation when selecting a Campbell clamp for a
given application.
7. Working load limit: The
maximum load that should
ever be applied to a Campbell
clamp. The working load limit
is forged or stamped on the
body of every clamp.
8. Maximum and minimum plate thickness: The size
plate a clamp is capable of lifting.
Never lift a plate that is not within
the grip range forged or stamped on the clamp.
9. Jaw opening: The capacity (grip range) of a clamp
in terms of plate thickness.
Never lift a plate that is not within
the grip range forged or stamped on the clamp.
9
WARNING:
WARNING:
10. Operating temperatures: Unless otherwise
specified in the application section of this
manual, Campbell clamps are designed to
operate only in temperatures ranging from 0°F to
200°F. This range applies to both the ambient and
material temperatures.
Contact Campbell Chain before
using Campbell clamps in temperatures not within
this range.
11. Locking clamps: Clamps equipped
with a lever and spring, or a tension
arm and a chainpull that places
and keeps the cam in contact with
the plate. The mechanism
facilitates attaching and
removing the clamp.
Never tamper with
a clamp’s locking mechanism during a lift.
12. Lock open-lock closed: A lever or chain activated
spring holds the cam away from or in contact
with the plate, and this makes clamp operation
easier. The Campbell “GXL” and “E” clamps have this
feature. These clamps will not lift the plate when in
the “lock open” position.
13. A notice pointing out danger,
apprising the operator and others that they should
protect themselves.
10
WARNING:
WARNING:
WARNING:
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