L- Chucks and Thread Milling Flashcards
In order to accommodate a number of different work holding devices it is common practice to fit a _______ to the spindle nose using the appropriate attachment method
BACKPLATE
Studs that are attached to an adapter plate
CAMLOCK studs
Allows the chuck to easily attach or release by sequentially rotating cams in the BACKPLATE
KEY
Is attached to the main spindle of a lathe and plays the role of transmitting the rotation of the spindle to the workpiece and of holding the workpiece tightly so that the workpiece, which is rotating at a high speed, does not fly away due to centrifugal force.
CHUCK
Fitted to the rear of a work holding device and consists of a ring of CAMLOCK studs
ADAPTER PLATE
The output end of a ______ _______ terminates with the SPINDLE _____
LATHE SPINDLE, NOSE
Types of Spindle Noses
L-Type Long Taper Key Drive Spindle Nose
Threaded Spindle Nose
The most common type of work holding device used on LATHES is the
3-JAW SELF-CENTERING CHUCK
Moves the three jaws of a 3-JAW SELF-CENTERING CHUCK together towards or away the center by rotating in a given direction. Tightens and loosens the jaws.
CHUCK KEY
Actuates the jaw motion
SCROLL GEAR
Drives the SCROLL GEAR along with a square drive socket
PINION/CROWN GEAR SET
The most common stock used in a 3-JAW SELF-CENTERING CHUCK
Hexagonal barstock
Square or octagonal stock requires a
4-JAW SELF-CENTERING CHUCK
Why is it not typical to use a 4-JAW SELF-CENTERING CHUCK
Rarely used
Expensive
What is used instead of the 4-JAW SELF-CENTERING CHUCK
4-JAW INDEPENDENT CHUCK
Used in a 4-JAW INDEPENDENT CHUCK to move each of the four jaws independently of one another
WORM GEAR
Profile of a barstock on a chuck
FACING
The 4-JAW INDEPENDENT CHUCK can grip ____ because its jaws move independently
RECTANGLES
SQUARES
Device used to adjust and center the jaws of a 4-JAW INDEPENDENT CHUCK
Dial Test Indicator or Dial Gage
The 4-JAW INDEPENDENT CHUCK can hold pieces concentrically and
eccentrically