Copyright © 2013 The Crosby Group LLC. All Rights Reserved.
Copyright © 2013 The Crosby Group LLC. All Rights Reserved.
1.
General
You have chosen a crosbyiP lifting clamp.
If CrosbyIP clamps are maintained as described in this manual, they will remain in
optimum condition. We believe that CrosbyIP clamps are the most reliable lifting
clamps available. But using reliable tools does not automatically mean that practices
are reliable. The people who work with clamps play an equally important role in reliable
lifting. Ensure that everyone who works with CrosbyIP lifting clamps has been
instructed in the proper application of the clamps.
Inter Product BV provides a 10 year warranty for its clamps. In order to benefit from this
warranty programme and for more details on maintenance procedures, please consult
www.crosbyip.com/warranty for more information.
Please read and understand these instructions before using the lifting clamp.
1.1
Safety precautions
Proper instruction for the personnel is of vital importance. This will contribute to
maximum reliability in the working environment.
The IPHOZ clamps may be used per pair, per three clamps or with several pairs
simultaneously for the lifting of steel plates. Ensure that each clamp receives its
equal share of the load. When using more than two clamps an equalizing beam is
recommended.
Hardness: With the standard clamps it is possible to lift steel with a surface
hardness of 363 HV10. For harder steel types contact your CrosbyIP Customer
Service Centre.
Contact your CrosbyIP Customer Service Centre before using this clamp for
plates and constructions that have a radius.
Temperature: The standard lifting clamps may be used with temperatures that lie
between 100 ºC (212 ºF) and -40 ºC (-40 ºF). For other temperatures contact your
CrosbyIP Customer Service Centre.
There are restrictions for operation in special atmospheres (e.g. high humidity,
explosive, saline, acid, alkaline).
Loads: For proper application of the clamp consult the load diagrams 1-2.
Ensure that all attachments between lifting eye and crane are properly fitted,
secured and coupled.
Use chains/cables which are longer than the width of the plate to be lifted.
IPHOZ clamps may not be used when reeved.
During the tensioning of cables or chains the clamps must remain properly
positioned.
Several plates may be transported or lifted per lift, only if the plates will not sag.
IPHOZ lifting clamps may be used for sagging, bended or joggled plates, however
in that case no more than
one
at the time.
Remark: when handling the load, one should ensure that the load and or clamp
does not encounter obstacles which could release the load on the clamps
prematurely.
A clamp is a device that must be clean when used. Dirt has an adverse affect on
the operation and also on the reliability of the clamp. When the clamp is dirty and
greasy it can be cleaned with diesel oil or petroleum. Then blow dry with air or dry
with a cloth and apply a little lubricant. It is important to ensure that the gripping
surfaces are clean at all times. Regular cleaning will enhance the life and reliability
of the clamps.
1.2
inspection protocols
Prior to every application of the clamp it is important the clamp operator inspects the
clamp for proper functioning.
Attention must be paid to the following (see illustrations 3-4 for part reference):
Ensure that the plate surface with which the clamp is to come into contact is free
of scale, grease, oil, paint, water, ice, moisture, dirt and coatings that might
impede the contact of the gripping surface with the plate.
Inspect camsegment (B) for wear and defects. The teeth must be sharp and free
of dirt.
Check the body (N) and the jaw for damage, cracks or deformation (this may
indicate overloading). The clamp must open and close properly (when the
operation of the clamp is stiff or heavy, it should be removed from operation for
inspection).
Check the camsegment shaft (G) for readily detectable wear and/or damage.
Check also the roll pin (P) which locks the camsegment shaft.
Check whether the W.L.L. and the jaw opening stamped on the body corresponds
with the load to be lifted.
This type of clamp can prone to deformation of the hole in which the chain (D-shackle)
impinges, resulting in the hole becoming oval. When that is the case the clamp should
be removed from service immediately.
Deformation in this part is mainly due to exceeding of the maximum side loading angle
of 15°. The maximum loading angles are displayed in the the loading diagrams 1-2.
check when
placing the clamp
that slings are
not twisted.
it is not permitted
to stay in the
danger zone of
the load.
no changes may
be made to
crosbyiP clamps.
never straighten,
attempt to bend
or heat treat
parts.
clamps suited for
stainless steel,
must be used
only for handling
stainless steel, to
avoid contact
corrosion.
EN
07
EN
06
The camsegment is the most critical part in the clamp and requires extra attention during
inspection. Ensure in any event for good light during inspection. Observe the following
rules during every inspection:
Camsegment: Reject when the sharpness of
one
tooth is damaged or worn for 50% or
more.