MacDon FlexDraper FD1 Series Operator's Manual page 44

Term
NPT
Nut
ORB
ORFS
RoHS (Reduction of
Hazardous Substances)
rpm
SAE
Screw
SDD
Soft joint
spm
Tension
TFFT
Torque
Torque angle
Torque-tension
Truck
UCA
Untimed knife drive
Washer
214683
PRODUCT OVERVIEW
Definition
National Pipe Thread: A style of fitting used for low-pressure port openings. Threads
on NPT fittings are uniquely tapered for an interference fit
An internally threaded fastener that is designed to be paired with a bolt
O-ring boss: A style of fitting commonly used in port openings on manifolds, pumps,
and motors
O-ring face seal: A style of fitting commonly used for connecting hoses and tubes.
This style of fitting is also commonly called ORS, which stands for O-ring seal
A directive by the European Union to restrict use of certain hazardous substances
(such as hexavalent chromium used in some yellow zinc platings)
Revolutions per minute
Society of Automotive Engineers
A headed and externally threaded fastener that threads into preformed threads or
forms its own thread into a mating part
Single-draper drive
A joint made with use of a fastener where joining materials are compressible or
experience relaxation over a period of time
Strokes per minute
Axial load placed on a bolt or screw, usually measured in Newtons (N) or
pounds (lb.)
Turns from finger tight
The product of a force X lever arm length, usually measured in Newton-meters (Nm)
or foot-pounds (lbf∙ft)
A tightening procedure where fitting is assembled to a precondition (finger tight) and
then nut is turned farther a number of degrees to achieve its final position
The relationship between assembly torque applied to a piece of hardware and axial
load it induces in bolt or screw
A four-wheel highway/road vehicle weighing no less than 3400 kg (7500 lb.)
Upper cross auger
Unsynchronized motion applied at cutterbar to two separately driven knives from a
single hydraulic motor or two hydraulic motors
A thin cylinder with a hole or slot located in the center that is to be used as a spacer,
load distribution element, or locking mechanism
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Revision A