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Revision A
Term
Definition
hp
Horsepower
ISC
Intermediate Speed Control
JIC
Joint Industrial Council: A standards body that developed standard sizing and shape for
original 37° flared fitting
Knife
A cutting device which uses a reciprocating cutter (also called a sickle)
MDS
Mechanical deck shift
n/a
Not applicable
N-DETENT
The slot opposite the NEUTRAL position of M Series SP Windrowers on operator
’
s console
NPT
National Pipe Thread: A style of fitting used for low-pressure port openings. Threads on
NPT fittings are uniquely tapered for an interference fit
Nut
An internally threaded fastener that is designed to be paired with a bolt
ORB
O-ring boss: A style of fitting commonly used in port openings on manifolds, pumps,
and motors
ORFS
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
R Series
MacDon R80 and R85 Rotary Disc Headers for windrowers
R1 SP Series
MacDon R113 and R116 Rotary Disc Headers for windrowers
RoHS (Reduction of
Hazardous Substances)
A directive by the European Union to restrict use of certain hazardous substances (such as
hexavalent chromium used in some yellow zinc platings)
rpm
Revolutions per minute
SAE
Society of Automotive Engineers
SCR
Selective catalytic reduction catalyst
Screw
A headed and externally threaded fastener that threads into preformed threads or forms
its own thread into a mating part
SDD
Single-draper drive
Self-Propelled (SP)
Windrower
Self-propelled machine consisting of a power unit with a header
SK
Single knife
SKD
Single-knife drive
Soft joint
A joint made with use of a fastener where joining materials are compressible or
experience relaxation over a period of time
spm
Strokes per minute
Tension
Axial load placed on a bolt or screw, usually measured in Newtons (N) or pounds (lb.)
TFFT
Turns from finger tight
Torque
The product of a force X lever arm length, usually measured in Newton-meters (Nm) or
foot-pounds (lbf
∙
ft)
Torque angle
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
Torque-tension
The relationship between assembly torque applied to a piece of hardware and axial load it
induces in bolt or screw