Shared Flashcard Set

Details

1st year machinist
unit 3
100
Other
Not Applicable
04/13/2015

Additional Other Flashcards

 


 

Cards

Term

What is the purpose of lubrication

Definition

Reduce friction

Term

for lubrication selection the higher the RPM the higher the viscosity should be

 

True

False

Definition

False

Term

for lubrication selection the higher the load the higher the viscosity should be

 

True

False

Definition

True

Term

for lubrication selection the higher the temperature the higher the viscosity should be

 

True

False

Definition

True

Term

Too high an oil level with a splash system can be a problem

 

True

False

Definition

True - can cause churning and foaming

Term

A drip lubrication system can have the flow of oil controlled

 

True

False

Definition

True

Term

How much grease should be in a bearing

Definition

Approx. 2/3 full

Term

The three types of cutting fluid are:

Definition

Cutting oil

Soluble oil

Chemical

Term

With soluble oil cutting fluids

 

You should

 

add water to the oil

          or

add oil to the water

Definition

add oil to the water

Term

Water based cutting fluids should not be used when machining:

Definition

magnesium alloys

Term

Three hazards when using cutting fluids are:

Definition

Skin irritation

 

Fumes

 

Fire

Term

Cutting tool shanks have a ________ taper

Definition

Morse

Term

Tapered Gib head keys have a taper of:

Definition

1/8" taper per foot

Term

Taper pins have a taper of:

Definition

1/4" taper per foot

Term

Tapered mandrels have a taper of:

Definition

.006" - .008" taper per foot

Term

A Morse taper has a taper of:

Definition

Approx. 5/8" per foot

Term

An ANSI milling machine taper has a taper of:

Definition

3 1/2" taper per foot

Term

A Morse taper is an example of a:

 

Self holding taper

 

Self releasing taper

Definition

Self holding

Term

What kind of taper is used to hold a drill chuck to its shank

Definition

Jacobs

Term

Metric tapers are express as:

Definition

Taper ratio

Term

Three scales used on lathe taper attachments to set the taper are:

Definition

taper per foot

 

included angle

 

centerline angle

Term

What type of abrasive is used for high tensile strength materials

Definition

Aluminum Oxide

Term

When facing the front of a floor grinder the nut on the left side will be:

 

Right hand thread

 

Left hand thread

Definition

Left hand thread

Term

What are 2 advantages of using a side wheel grinder

Definition

Grinding face is flat not convex

 

Angles don't change as the wheel wears

Term

What operations are belt grinders used for

Definition

Chamfering and deburring

 

Fine grinding and polishing

Term

What should be done to test a grinding wheel before mounting

Definition

Visual inspection

 

Check RPM rating

 

Ring test

Term

After mounting a new grinding wheel what should the gap on the work rest be set to

Definition

1/16"

Term

What is the maximum gap between a grinding wheel and the work rest

Definition

1/8"

Term

How long should you let a newly mounted grinding wheel run at full RPM before using it

Definition

1 full minute

Term

What should you tap a suspended new grinding wheel with when checking it for cracks

Definition

Something non metallic

Term

What size should the flange be on a floor grinder

Definition

1/3 the size of the wheel

Term

What size should the blotter be on a floor grinder

Definition

Larger than the wheel flange

Term

What is meant be a glazed grinding wheel

Definition

Glazing occurs when the grains become dull and don't break away exposing new cutting edges

Term

What is meant by a loaded grinding wheel

Definition

When the spaces between abrasive grains get plugged

Term

What is meant by dressing an abrasive wheel

Definition

Removing the top layer of abrasive to expose new grains

Term

What angle should a diamond dresser be held at

Definition

15 degrees

Term

What is meant by truing a grinding wheel

Definition

Making the outside of the wheel concentric with the bore

Term

What are the 3 main types of drill presses

Definition

Sensitive

 

Upright

 

Radial Arm

Term

Which of the 3 main drill presses have/has only manual feed only 

Definition

Sensitive

Term

Which part of a drill press does not revolve

Definition

The quill

Term

Which of the 3 main drill presses have/has only power feed

Definition

Upright and Radial arm

Term

Which drill press or drill press can the head be raised with power

Definition

Radial arm

Term

What safety precaution should you use if drilling a horizontal hole with a magnetic base drill

Definition

Use a safety chain so it won't fall if power is lost

Term

What RPM should be used when reaming a hole compared to drilling a hole

 

What feed rate should be used

Definition

1/2 the RPM used for drilling

 

2 times the feed rate

Term

What are chucking reamers

Definition

Straight shank machine reamers designed to fit in a chuck

Term

What size should a hole be drilled before reaming a 3/8"

hole

Definition

1/64" under size : 23/64

Term

Should a reamer be removed from a hole before or after the spindle is stopped

Definition

before

Term

What is the most common included angle for a countersink

Definition

82 degrees

Term

What RPM should be used when countersinking a hole compared to drilling

Definition

approx. 1/4 the drilling rpm

Term

What RPM should be used when counterboring a hole as compared to drill a hole

Definition

1/4 the drilling rpm

Term

What type of tap should be used for blind holes

Definition

Spiral fluted

Term

What type of tap should be used for through holes

Definition

Gun tap (spiral pointed)

Term

What RPM should be used when spotfacing as compared to drilling a hole

Definition

1/4 the rpm used for drilling a hole

Term

What is a drill sleeve used for

Definition

to increase the size of the taper when the taper on a tool is too small for the spindle

Term

What is a drill socket used for

Definition

to decrease the size of the taper when the taper on a tool is too large for the spindle

 

Term

What is a drill drift used for

Definition

to remove tools from sleeve and spindles

Term

Where should the t-bolt be located when clamping a workpiece

Definition

As close as possible to the workpiece

Term

What is a drill jig used for

Definition

to hold and locate the hole location

 

holds the work and guides the drill bit

Term

The 3 main parts of a drill are

Definition

Point

 

Body

 

Shank

Term

Where do you measure the diameter of a drill bit

Definition

Across the margins

Term

Where is the land located on a drill bit

Definition

Between the flute and the margin

Term

What part of a drill bit forms the chisel edge

Definition

the web

Term

What are straight fluted drill bits used for

Definition

soft material

Term

What are spade drills used for

Definition

large diameter holes

Term

What is another name for a center drill

Definition

combination drill countersink

Term

Where do rose reamers do all their cutting

 

What angle is the chamfer on a rose reamer

Definition

On the chamfered end

 

45 degrees

Term

What are the 4 sizing methods used for drill bits

Definition

Fractional

 

Number

 

Letter

 

Metric

Term

Which is larger a # 15  or a # 25 drill bit

Definition

# 15

Term

Which is larger a D drill bit or a F drill bit

Definition

F

Term

How much clearance should there be behind the cutting edge of a drill bit

Definition

8 to 12 degrees

Term

What is the included angle of a general purpose drill bit

Definition

118 degrees

Term

What is the included angle of a drill bit for hard material

Definition

135 to 150 degees

Term

What is the included angle of a drill bit for soft material

Definition

60 to 90 degrees

Term

Why does a drill bit have its chisel edge thinned

Definition

the web gets thicker towards the shank

Term

What is the most common set used on a band saw

Definition

raker

Term

What is meant by stacking when using a horizontal band saw

Definition

stackin several pieces together and cutting them all at once

Term

What pitch of blade is used for general purpose sawing with a band saw

Definition

10

Term

What is meant by the blade width

Definition

distance from the back of the blade to the tip of the tooth

Term

What affect does the width of the blade have

Definition

determines the size of the radius that can be cut

Term

What is meant by the kerf of the blade

Definition

the width of the cut that the blade makes

Term

What tooth shape is used for general purpose band saw blades

Definition

standard tooth

Term

Which band saw blade set has one tooth to the right, one to the left and one straight and repeats this pattern

Definition

raker

Term

Which band saw blade set has one tooth to the right, one to the left, and repeats this pattern

Definition

Straight or Alternate

Term

A bolt head has 3 lines on it. What grade is it

Definition

grade 5

Term

What class of metric bolt is equivalent to a grade 5 imperial bolt

Definition

Class 8

Term

A 1032 woodruff key

What does the 32 represent

 

What does the 10 represent

Definition

32 / 8's in diameter - 4" diameter

 

10/32's in width - 5/16" wide

Term

What would the measured size be for a dowel pin

Definition

0.0002" over nominal size

Term

At what height should the spacer block end of the strap clamp be in order to clamp properly

Definition

slightly higher than the workpiece

Term

What will happen if a pilot hole is too large when drilling a large hole

Definition

The drill will chatter

Term

What size should a pilot hole be when drilling

Definition

Slightly larger than the chisel edge

Term

Which Drilling Machine can spin (index) the head to the next position

Definition

Turret drilling machine

Term

What is the definition of Drilling

Definition

MAKING A HOLE WHERE NONE EXISTED BEFORE

Term

How are Drill Chucks sized

Definition

By THE LARGEST DRILL THEY WILL HOLD

 

Term

What are Core Drills used for

Definition

Enlarge existing holes

Term

How can a Twist Drill be modified to drill soft materials such as brass

Definition

GRIND A SMALL FLAT ON THE CUTTING EDGE PARALLEL TO THE AXIS OF THE DRILL

 

Term

What will happen if the cutting lip lengths on a drill bit are not equal

Definition

Will cut oversize

Term
Three types of lock washers are
Definition

helical spring

internal locking

external locking

Term
Gaskets placed on each side of a grinding wheel are made of:
Definition
Blotting paper
Term
Why does a drill bit have its chisel edge thinned
Definition
the web gets thicker towards the shank
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