British Columbia - Vancouver & Lower Mainland Southwest
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Text treeIndustrial Mechanic (Millwright) Terminology

Glossary

agitator
a device which keeps material moving in a tank or vessel; the movement may be required to prevent settling and to mix material
arc of contact
the surface contact between the sheave and pulley and the belt, or the sprocket and the chain
axial flow
a flow along the axis of a fan or a pump
babbitt
material used in plain bearings (usually lead-based)
bearing
a device that allows 2 parts to rotate or move in contact with each other
blower
a device that moves air at low or high pressures and volumes
centrifugal flow
a flow of 90 degrees to the axis of a fan or a pump away from the centre
clutch
a device used to engage or disengage a driver to a driven unit
conveying system
a system used to move material (usually solid) from one place to another
couplings
parts used to connect a driver to a driven unit
elastomeric element
a flexible element used to join couplings and dampen energy
engineered lift
consultation with an engineer for an approved design of a lifting apparatus or lifting procedure without exceeding the rated capacity of the rigging equipment; it should be noted that this is generally done when unusual circumstances of a lift dictate deviations from normal accepted trade practices
fans
a device used to create air movement
ferrography
wear analysis of machine bearing surfaces by collection of ferrous (or nonferrous) wear particles from lubricating oil in a ferrograph analyzer
fluid
a substance (either a liquid or gas) material that has the ability to flow
gear system
a combination of gears used to alter the speed and power from a driver to a driven unit
hypoid gear
a set of gearing whose shafts intersect on a different plane
maintain
keeping a machine or system running efficiently with a minimum amount of down-time; for use in this analysis the term “maintain” can encompass: checking for worn parts, lubrication, adjustment, inspection and modification
manufacturers’ specifications
the performance and engineering standards for a particular machine as detailed by the manufacturer; this information is usually available from drawings, manuals and bulletins provided by the manufacturer
multi-plane balancing
balancing of a rotating part on more than two planes; multi-plane balancing is generally performed with computer software that is usually provided with vibration analysis and balancing instruments
non-destructive testing (NDT)
testing procedures that do not damage the material being tested; these may include magnetic particle testing, dye penetrant testing, and fluid sampling
positive displacement
transfer by pump without loss of pressure or material
predictive maintenance
activities utilizing information from past and current performance records to objectively predict mechanical problems; predictive maintenance is a proactive monitoring approach rather than a time-based or reactive approach
preventive maintenance
activities based on a periodic sampling and inspections; it normally involves the routine scheduling of maintenance activities; this schedule is based on past experience and manufacturers’ recommendations
prime mover
driver of the machine; it may be an electric, steam, gas or diesel powered
sensory inspection
inspecting through the senses (visual, hearing, feeling, smell)
service
for use in this analysis the term “service” refers to installing, diagnosing, repairing and maintaining
thermographic equipment
equipment that displays the temperatures of components by measuring infrared radiation
vibration analysis
the process of monitoring the condition of equipment and the diagnosis of faults in equipment through the measurement and analysis of vibration within that equipment

Abbreviations

ANSI
American National Standards Institute
ASME
American Society of Mechanical Engineers
ASTM
American Society for Testing and Materials
AC
Alternating Current
DC
Direct Current
CSA
Canadian Standards Association
ISO
International Standards Organization
MIG
Metal Inert Gas
SMAW
Shielded Metal Arc Welding
TIG
Tungsten Inert Gas
WHMIS
Workplace Hazardous Materials Information System
CFM
cubic feet per minute
MSDS
Material Safety Data Sheets
NDT
non-destructive testing
OH&S
Occupational Health and Safety
PPE
personal protective equipment
Provided by the Interprovincial Standards Red Seal Program National Occupational Analysis (NOA) http://www.red-seal.ca