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faces on finished or polished plates, 
secure written recommendations 
from RENFROE. 
 

S T R U C T U R A L   M E M B E R S —
FABRICATED SECTIONS:  Unless 
otherwise specified, clamps described 
as capable of handling structural mem-
bers and fabricated sections are limited 
to hot-rolled steel whose Brinell Hard-
ness does not exceed 300.  

WARN-

ING:  For applications not covered 
by the above information, secure 
written recommendations from 
RENFROE. 

 
RATED CAPACITY:  The rated capac-
ity of a RENFROE product is based on 
the product being in “new or as new” 
condition and represents the maximum 
load the product is to be subjected to 
when utilized in the manner described 
in this manual.  Wear, misuse, abuse 
and other factors relating to usage may 
reduce the rated capacity.  Shock load-
ing and the factors listed must be taken 
into consideration when selecting a 
RENFROE product for a given applica-
tion. 
 
PLATE THICKNESS:  The minimum 
and maximum plate thickness a clamp 
specified for handling plates is capable 
of lifting.  

WARNING:  Never use a 

clamp for lifting a plate where the 
plate thickness is less than or 
greater than the minimum and maxi-
mum stenciled on the clamp. 
 

JAW OPENING:  The minimum and 
maximum thickness of a member of 
clamp specified as having a JAW 
OPENING is capable of handling. 

 

WARNING:  Never use a clamp on a 
member whose thickness is less 
than or greater than the range of jaw  
 

opening stenciled on the clamp. 
 

O P E R A T ING   T E M P ER A T U R E S : 

 

Unless specified under the Application 
Section of the individual model, the 
approved operating temperature of 
RENFROE clamps is from zero de-
grees Fahrenheit (-18 Celsius) to a 
maximum of 200 degrees Fahrenheit 
(+93 degrees Celsius).  The minimum 
and maximum temperatures apply to 
both ambient and the material being 
handled by the clamp.  

WARNING:  

Secure written authorization from 
RENFROE before using clamps in 
temperatures other than shown. 
 

“HOT LIFTS”:  The Model R and S 
clamps are available in modifications 
that are capable of making lifts where 
the temperatures of the member being 
lifted exceeds 200 degrees Fahrenheit 
(+93 degrees Celsius).  Depending on 
conditions a lift may exceed 1000 de-
grees Fahrenheit (538 degrees Cel-
sius).  The exact application and tem-
peratures of the plates to be handled 
are critical in selecting the proper 
model.  

WARNING:  Secure written 

instructions from RENFROE for all 
hot lift applications. 
 

LOCKING CLAMPS:  Locking clamps 
are divided into the categories listed 
below.  With the exception of the 
“Locking Wedge” and “Locking Screw” 
type the purpose of the locks are to 
facilitate the attaching and removing of 
the clamp from the member being han-
dled. 
 
“LOCK CLOSED” - an overcenter 
spring loaded mechanism in which the 
spring exerts a force on the gripping 
cam when the lock handle is moved to 
the “Lock Closed” position.  When the  
 

Содержание S 12

Страница 1: ...WARNING Before putting tool in service take to your immediate supervisor Model S Clamp Application Operation and Maintenance Manual OM 211 S RENFROE ...

Страница 2: ...INCORPORATED of Jacksonville Florida has been an international leader in the manufacture and mar keting of Lifting Clamps for over fifty years RENFROE products are manufactured in Jacksonville Florida A worldwide network of stock ing distributors provides a readily available source of supply and service J C RENFROE SONS INCORPORATED Jacksonville Florida 32201 Telephone 904 356 4181 Toll Free 1 800...

Страница 3: ...H IS NOT SPECIFICALLY AND PARTICULARLY CONTAINED HEREIN PLEASE REFER TO THAT STATEMENT FOR REPRESENTATIONS AND WARRANTIES OF PRODUCTS MANUFACTURED BY J C RENFROE SONS INC WARNING Prior to selection operation and or maintenance of RENFROE products read and understand the infor mation provided in this manual The understanding and use of the Definitions are important in determining the limitations an...

Страница 4: ......

Страница 5: ...t light loads 9 DO Use an adequate number of clamps to balance load DON T lift loads that are not balanced 10 DO Use clamps within their rated capacity DON T overload clamps 11 DO Inspect clamp before each lift follow inspection and maintenance in structions outlined in this manual and use RENFROE replacement parts to assure proper operation of the clamp 12 DON T Use clamp that has been overloaded...

Страница 6: ...tes positioned horizontally to the floor level The rigging attached to clamps is generally multi legged slings with the connecting point of the slings being approximately centered between the distance separating the clamps Refer to illustrations shown below WARNING The capacity of all hori zontal clamps is based on a sling angle of sixty degrees 60 See illustration below Sling angles less than six...

Страница 7: ...er use a clamp on a member whose thickness is less than or greater than the range of jaw opening stenciled on the clamp OPERATING TEMPERATURES Unless specified under the Application Section of the individual model the approved operating temperature of RENFROE clamps is from zero de grees Fahrenheit 18 Celsius to a maximum of 200 degrees Fahrenheit 93 degrees Celsius The minimum and maximum tempera...

Страница 8: ...KING WEDGE is a fluted steel wedge that is driven in place with a hammer The body of the wedge is positioned in a slot in the clamp body with the fluted edges contacting the member to which the clamp is being attached Refer to Operation Section of specific models of the Locking Wedge clamps for additional details Typical Locking Wedge clamps are Model A1 B1 B2 and PB LOCKING SCREW Lock Screw clamp...

Страница 9: ...r form those specific duties QUALIFIED PERSON A person who by possession of a recognized degree in an applicable field or certificate of professional standing or who by extensive knowledge training and experience has successfully demonstrated the ability to solve problems relating to the subject matter at hand ...

Страница 10: ...ck Closed feature which facilitates attaching and removing the clamp from the plates Refer to Definition Pages for the explanation of Lock Open Lock Closed Refer to exploded view of clamp located at the end of the Maintenance Sec tion for identification of component parts WARNING Refer to the sections on operation and maintenance for the approved procedure in the operation and maintenance of this ...

Страница 11: ... missing or illegible C Inspect gripping surfaces for wear and defects The gripping surfaces must be sharp and free of foreign matter D Swivel jaw should turn freely Inspect swivel jaw mounting hole in body for elongation indicating overloading or wear E Inspect lifting shackle and all pins for wear and damage F Lock spring must have definite amount of tension when the lock is moved to the Lock Cl...

Страница 12: ...Step 6 Install clamp on plate to be lifted Do not allow inside of jaw opening to rest on plate Maintain 1 4 clearance Refer to Illustration A Step 5 and Photo graph B ...

Страница 13: ... G Step 7 Move lock handle to Lock Closed position after making certain the swivel jaw and gripping cam are fully in contact with the plate and not partially on and off the edge of the plate Lock Pawl must rest on body bolt spacer sleeve Spring now exerts force on gripping cam Refer to Illustration A Step 5 and Photograph H WARNING Lift only when clamp is in Lock Closed position ...

Страница 14: ...on nel are clear of the area of the lift Never stand under or near a member being lifted Refer to Photograph J Step 9 To remove clamp after plate is fully supported and at rest in a stable posi tion relax lifting force keeping hands clear move the lock handle to the Lock Open position lift clamp from plate Refer to Illustration A Step 5 and Pho tograph K ...

Страница 15: ...ertinent information is miss ing do not use clamp until it has been properly labeled Inspection Kits are available at no charge upon request from the distributor or RENFROE Kit contains RENFROE clamps are constructed so the wearing parts may be replaced by installing individual parts or by using RENFROE Rebuild Kits containing all parts generally replaced due to normal wear ...

Страница 16: ...wing Every lift Inspection A visual inspection by the operator before and after each lift made by the clamp Check the clamp to be certain the Identification and warn ing tags are present and legible Do not use the clamp if the tags are missing or illegible Inspect gripping surfaces for wear and defects Gripping surfaces must be smooth and free of foreign matter Swivel jaws should turn freely Inspe...

Страница 17: ...aged the clamp should be inspected by a qualified person who will make a determination as to its fitness to make a lift At this time the condition of the clamp should be noted and recorded After inspection by the qualified person it may be decided that a periodic inspection proce dure is necessary Periodic Inspection A recorded inspection by a qualified person as described in the Periodic In spect...

Страница 18: ...ip Radio Fre quency Identification Device is embedded in the clamp body or a clamp component If the I D plate is missing and the RFID chip is unavailable call the Renfroe factory for instructions on returning the clamp for recertification Step 2 Completely disassemble clamp Step 3 Remove all dirt grease and other matter that may inhibit proper inspection of the clamp body or clamp components Step ...

Страница 19: ...n sions equal or exceed those listed on this chart WARNING Replace clamps containing fractures elongated pin holes worn or elongated swivel jaw mounting hole distorted jaw openings clamp bodies with worn and rough shackle pin guide slots and jaw open ings with displaced metal Step 4 LOCK ASSEMBLY S 21 A Inspect for damage and wear B Inspect lock handle for binding particularly when moving lock han...

Страница 20: ...and free of foreign matter B Inspect cam straps for distortion and fractures Refer to exploded view C Inspect pin holes in cam straps and cam for elongation and wear WARNING Replace cam assemblies that have cams with worn or dam aged teeth contain fractures and cams and cam straps with elongated pin holes Step 7 TOP ROLLERS S 24 4 Ton capacities and above A Inspect top rollers for damage and wear ...

Страница 21: ...cess before installing swivel jaw Recommended lubricant is powdered graphite or Molybdenum Disulfide grease Tighten screw and lock nut then reverse nut one turn to allow free rotation of the swivel jaw WARNING Replace worn dull or damaged swivel jaws Step 12 BODY BOLT and BODY SPACER SLEEVE S 30 A Inspect body bolts and spacer sleeves for wear at position where sleeves contact shackle B Inspect bo...

Страница 22: ...omponent parts in any manner In the event the stenciling is worn and not legible or the tag containing the model capacity or other pertinent information is missing do not use clamp until it has been properly labeled EXCLUSION OF WARRANTY THERE EXISTS NO WARRANTIES NEITHER EX PRESSED NOR IMPLIED WHICH EXTEND BE YOND THE DESCRIPTIONS OR STATEMENTS CONTAINED IN THE FACE OR ANY PART HEREOF J C RENFROE...

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