Founded in 1919, Campbell is the largest manufacturer of welded and weldless chain in the United States. Users of Campbell chain can select from a wide range of working load capacities including proof coil, high test, transport and alloy; finishes including self-colored, Blu-Krome®, galvanized and bright color polycoated; links that are short, long, twisted, locked, looped, even stamped from flat stock. Several chain types are even available in solid brass and bronze. Campbell chains and assemblies, including slings for overhead lifting, and binder chains, have earned for the manufacturer an outstanding reputation for quality.
Camtrol
System
Campbell’s
CAMTROL SYSTEM makes chain products easier to identify and understand. That’s because all are based on engineering formulas
computed according to ISO (International Organization for Standardization),
NACM (National Association of Chain Manufacturers) and ASTM (American Society
for Testing and Materials). Use the CAMTROL
SYSTEM to make wise chain purchasing decisions.
Use it to compare the various categories of chain, to choose the right
chain for the job according to the price per thousand pounds of working load instead
of buying on a price per foot.
Variations
in finish or heat treatment
The
mechanical properties shown on the Camtrol Chart apply only to the various
chains in their standard finish and heat treated condition. Finishes such as galvanizing or electroplating
may reduce strengths. The manufacturer’s revised recommendations should be
solicited when such treatments are desirable for specific applications.
Hallmarking
(Identification)
All
System 4, 7, 8, and 10 chains and all System 3 chains 5/16” (8 mm) and larger
are marked with the grade identifier approximately every 12” or less. Please refer to the chain type of interest in
this catalog for the specific hallmarks.
Important
Chain Terms
WORKING
LOAD LIMIT
The
“working load limit” (rated capacity) is the maximum combined static and
dynamic load in pounds or kilograms that should never be applied to the product
in service, even when the product is new, and when the load is uniformly
applied in direct tension to the product.
PROOF
TEST
The
“proof test” is a quality control test applied to chain for the purpose of
verifying weld and material quality. It
is the minimum force in pounds or newtons that the chain has withstood in
direct tension as part of the manufacturing process. Proof testing assures that the chain is more
than capable of performing at its rated working load limit. Proof test loads are a manufacturing
integrity test and shall not be used as criteria for service or design
purposes. All Campbell proof tested
chain and components are proof tested in accordance with the applicable ASTM,
NACM and AISI/ASME requirements.
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