Grizzly G0492 - Manual (Page 12)

-10-
G0492 12" X 36" Combo Lathe/Mill
The following is a list of common definitions, terms and phrases used throughout this manual as they relate
to this lathe/mill and metalworking in general. Become familiar with these terms for assembling, adjusting
or operating this machine. Your safety is
VERY important to us at Grizzly!
Arbor: A machine shaft that supports a cutting
tool.
Backlash: Wear in a screw or gear mechanism
that may result in slippage, vibration, and loss
of tolerance.
Collet: A conical shaped split-sleeve bushing
which holds round or rectangular tool and/or
workpieces by their outside diameter.
Cross Slide: A fixture attached to the lathe car-
riage that holds the compound rest and can be
moved in and out.
Cutting Speed: The distance a point on a cutter
moves in one minute, expressed in meters or
feet per minute.
Dial Indicator: An instrument used in setup
and inspection work that shows on a dial the
amount of error in size or alignment of a part.
Dividing Head: A milling machine accessory
used to divide a circular object into a number
of equal parts.
Down Milling or Climb Milling: Feeding the
workpiece in the same direction as the cutter
rotation.
End Mill: A cutter with cutting surfaces on both
its circumference and end.
Facing: In lathe work, cutting across the end of a
workpiece, usually to machine a flat surface.
Feed: The movement of a cutting tool into a
workpiece.
Fixture: A device that securely holds the
workpiece in place during cutting operation as
opposed to a
Jig which is used to hold and
guide a workpiece through an operation.
Gib: A tapered wedge located along a sliding
member to take up wear or to ensure a proper
fit.
Headstock: The major lathe component that
houses the spindle and motor drive system to
turn the workpiece.
Lathe Center: A lathe accessory with a 60°
point which is inserted into the headstock or
tailstock of the lathe and is used to support the
workpiece.
Leadscrew: Lathe—The long screw that is driv-
en by the end gears and supplies power to the
carriage. Mill—The screws that move the table
in longitudinal, transverse, or vertical direc-
tions.
Spindle: The revolving shaft that holds and
drives the workpiece or cutting tool.
Tailstock: A moveable fixture opposite of the
headstock on a lathe that has a spindle used
to support one end of a workpiece and for hold-
ing tools.
Tool Post: The part of the compound rest that
holds the tool holder.
Turret: Lathe—A machine fixture that holds mul-
tiple tools and can be revolved and indexed to
position. Mill—The part of a mill which rotates
on the column and can be set to a specific
degree.
Ways: The precision machined and flat tracks on
a lathe or mill on which the carriage, tailstock,
and the mill table and knee slide.
Glossary of Terms