Final Flashcards
Sensitive drill press
No power feed and good for holes up to half inch diameter
What to do when completed drilling on a sensitive drill press
Back off on pressure
Upright drilling machines
Good for holes from half inch to 4 in in diameter
Feature upright drilling machine has compared to sensitive drill press
Power feed, and you must clamp to the table when using power feed
What should you be aware of when using the cross feed dial in a lathe?
Backlash, to avoid issues because of backlash if you overshoot correct your setting turn your dial back one full turn to take out the backlash then approach to the correct setting again
Three ways to cut a taper
Using the compound rest, using the tailstock offset method, using the taper attachment
What is the purpose of a steady rest and a follower rest on a lathe
The purpose of a steady rest is sport a long piece of work at either end or in the middle you attach it to the way
What is the taper per foot on a mandrel
006 - 008 per foot
What are the three methods you can use to hold a three jaw Chuck in lathe
Screw on Chuck, taper key check and D1 style cam lock
Hand drills
Used in every shop for holes up to half inch diameter
Rule for using a magnetic drill
Strap or chain it down
Radial drilling machines
Are used to drill holes in very large work pieces that are difficult to position manually under the spindle of a standard drill press
How many ways are there for feed on a radial drill press
Two, hand and power feed
How to size a drill press
Distance from the center of the spindle to the column, or the largest diameter of the workpiece that can be centered under the spindle axis
Sizing a radial drill press
Calm diameter and by the greatest distance the spindle axis to the edge of the column when drilling
Sizing a drill chuck
Drill trucks are size according to the largest drill they can hold
How to remove a tool from a drill sleeve/socket
A drift
A floating reamer is
Self-centering
Difference between a jig and a fixture
A jig uses a guide and a fixture holds parts
Two most common drill bits
Taper and straight
Straight chancer used on drills up too
Half inch in diameter
Taper drills are found on drills larger than
Half inch diameter
What should you not use a high Helix drill for
Brass, bronze etc
Straight fluted drill
Used for brass, bronze and plastic
How large should your pilot hole be
Slightly larger than chisel edge
What would happen if your pilot hole was too large
You will end up with chatter and an out of round hole
Correct way to put your workpiece in a vise
Centerline should be inside device
Speed for countersinking or counter boring
1/4 of drilling speed
Rule of thumb for reaming
Half speed twice the feed
Where are the margins on a drill bit
They go down the body go down the land and flute
Brokenness split web on drill bit from what?
Too much feed not enough clearance
Reason for a Bell mouth hole
Cutting lips uneven angle, point angle and even
Reason for drill chatter
Set up is not rigid enough, pilot holes too large
Squeal or jams when drilling
Worn margins excessive heat
Reason for an oversized hole
Cutting lips of unequal length
Spiral fluted tap
Pulls chips out of the hole
Spiral point tap
Pushes chips down hole
Straight fluted tap
Jams chips in hole
Fractional drill bits
1/16 to 4
Increased by 1/64 increments 1 3/4 then by 1/32
Letter size drill bits
They go from a to z, a is the smallest z is the largest
0.234 to .413.
Number size drill bits
Number one through number 97. 1 is largest
Metric drill bits
Metric drill bits go from .04 mm all the way up to 80 mm in diameter
On a lathe what does cutting speed refer to
The speed at which point the workpiece moves past the cutting tool
What should the speed be set to when parting
Half the normal turning speed
Ratio on boring bar
4:1
Reaming holes under half inch
1/64 smaller
Reaming holes over half inch
1/32
What can’t you do when cutting a metric thread
Disengage the half nut
Speed for polishing
1,000 or more
What kind of RPM would you use for knurling
150 or less, never stop rotation midpoint
Cutting fluid for cast iron
Keep that mother f***** dry
Most common cutter
Right hand
What does the overarm supports on a milling machine
The arbor
Most common milling machine
The ram type
Which million machine allows the million had to be swiveled or repositioned over the work piece
Ram
Name the six tool holders and adapters
Morse taper adapter, Jacob’s taper adapter, spring call it, heavy duty call it, R8 adapter, style c arbor, style b and style arbor
Purpose of a backlash eliminator on a milling machine
Remove clearance between the screw and nuts on the longitude table, allows for climb milling
The difference between a mill with a geared head and a meal with a variable speed head is
The geared head must be stopped prior to changing rotational speed where variable speed drive requires the spindle turning to change speeds
What is the maximum depth the operator can take when using an end Mill
Half the diameter of the end mill
Difference between a slot drill and an end Mill
A slot drill has the capability to plunge cut, where that is not the case for all end mills
What is the key to holding work on a million machine table while using straps and clamps
Ensure the clamps are parallel to the surface on the table, bolt closer to the work piece than the step blocks
Shank type tools
And mills, face Mills, radius Mills and drills
Purpose of a drawbar
The drawbar is used to secure the cutting tool into the spindle bore, million tapers are not self-locking
What makes the universal horizontal milling machine different from a plane milling machine
The table swivels on a universal, only difference
The feed on a million machine is based on what criteria
Chip load per tooth, the material of the cutting tool and the type of material being cut
What does machine condition refer to while performing lathe, drilling or machining on a mill
Rpm, feed and doc in that order
Purpose of a fly cutter
Single mother f**** cutting tool, often used to face part, Bora part or had a specific profile on a part
