R&M Materials Handling ELECTRIC CHAIN HOISTS LoadMate Chain Hoist General Operation Manual - Manual (Page 12)

Electric Chain Hoist Operator’s Manual/EN/11.30.10
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secret that may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M MATERIALS
HANDLING, INC. . Copyright © (2010) R&M MATERIALS HANDLING, INC. . All rights reserved.
4 ELECTRIC CHAIN HOIST CONSTRUCTION
4.1 General Hoist Construction
Overhead hoists are defined in the ANSI / ASME standards as a machinery unit that is used for vertical lifting
service involving material handling of freely suspended (unguided) loads. Overhead hoists are a basic and
versatile piece of equipment used in manufacturing, warehousing, construction, and numerous other
applications to aid workers in the handling and moving of loads.
Overhead hoists are available in various types of configurations and constructions. Overhead hoist types are
usually referred to using the terms that define a specific configuration and construction.
The following are three areas that further define the hoist type.
4.2 Lifting Medium
Lifting medium defines the type of component used to transmit and cause vertical motion of the hoist load hook
or hoist load block. Chain is a lifting medium. The LoadMate® Series Electric Chain Hoist uses welded link
load chain.
Welded Link Load Chain
Welded link load chain consists of a series of interwoven formed and welded links. The links fit pockets
of the hoist load sprocket that transmits motion to the load chain. The load sprocket may also be called
load wheel, load sheave, pocket wheel, chain wheel, or lift wheel. Welded link load chain sizes are
stated as the diameter of the wire used to form the link, i.e. 3.1mm, 4.8mm, 6.8mm, etc. Welded link
load chain is designed and manufactured to specific dimension and material strength requirements for a
specific hoist. Welded link load chain is
not interchangeable between different manufacturers’ hoists;
and is not interchangeable with welded link lifting chain used for other purposes such as chain slings
and securing the load. Only original equipment welded link load chain, as supplied by R&M Materials
Handling, Inc. , shall be used on any LoadMate® Series Electric Chain Hoist .
4.3 Power for Operation
Power for operation defines the type of power used to operate the hoisting motion. The electric chain
hoist uses electrical power to run an electric motor that provides the motion for lifting and lowering the
load.
m
DANGER: ON ELECTRIC POWERED HOISTS, HAZARDOUS VOLTAGES ARE PRESENT IN
THE CONTROL BOX, OTHER ELECTRICAL COMPONENTS, AND CONNECTIONS
BETWEEN THESE COMPONENTS.