N - Marking Out and Broaching

Question 1

First step in “Marking Out” the hole placement when drilling manually

Answer 1

Marking Blue

Question 2

Used to scratch a cross at the desired location to drill manually

Answer 2

SCRIBER

Question 3

Parts of a SCRIBER

Answer 3

Bent point
Straight Point
Grip

Question 4

Used to create a small “Center Pot” or indentation at the center of the scratched cross

Answer 4

CENTER PUNCH (hammered or automatic hammerless type)

Question 5

Short and stubby cutting tool which makes a shallow conical hole at the precise location that acts as a “funnel” for the subsequent twist drill. It has a small starter point to stop the “dancing”, which is immediately followed by a tapered shoulder.

Answer 5

CENTER DRILL

Question 6

Twist drill which is 1/32’’ smaller than the desired hole used to remove the bulk of the metal, leaving a rather rough bore to the hole.

Answer 6

PILOT DRILL

Question 7

Standard twist drill which completes the drilling procedure with the desired final diameter of the hole.

Answer 7

FINISH DRILL

Question 8

CNC drilling requires _ tools to complete a task and _ automatic tool changes

Answer 8

3, 2

Question 9

All steps in CNC Drilling

Answer 9

CENTER DRILL - PILOT DRILL - FINISH DRILL
ALSO: COUNTERSINK, COUNTERBORING, REAMING, TAPPING

Question 10

Accommodations made to final finished holes for screw heads

Answer 10

HOLE MODIFICATION

Question 11

When the hole is to carry a FLAT HEAD SCREW it must be modified to sit flush with the surface

Answer 11

COUNTERSINKING (60 DEGREES)

Question 12

When the hole is to carry a CAP SCREW it must be modified to sit flush with the surface

Answer 12

COUNTERBORING

Question 13

TRUE OR FALSE:
An oversized twist drill is NOT generally used for counterboring since this would not produce a flat seat to the counterbore

Answer 13

TRUE

Question 14

A metal cup with serrated teeth along the periphery and a pilot twist drill in the center for proper positioning

Answer 14

HOLE SAW

Question 15

Preferred way of cutting large holes in metal plate. Cannot be used in a power tool as they need to be held rigidly. Uses SPCT or “inserts”

Answer 15

TREPANNING TOOL

Question 16

Tools not capable of cutting “Blind Holes”

Answer 16

TREPANNING TOOL
HOLE SAWS

Question 17

Hole modification to make a drilled hole very smooth and with precise dimensions.

Answer 17

REAMING (performed using a REAMER)

Question 18

Hole in which REAMING is performed

Answer 18

FINSIH DRILLED HOLE
(MUST BE 1/64TH UNDERSIZED)

Question 19

Most common MACHINE TOOLS dedicated to hole making operations

Answer 19

VERTICAL DRILL PRESS
(also known as:
STAND DRILL
VERTICAL DRILL
DRILL PRESS
SENSITIVE DRILL)

Question 20

Large, heavy duty machine capable of drilling big diameter holes while providing precise motion of the drill head with multiple degrees of freedom

Answer 20

RADIAL ARM DRILL

Question 21

Various cutting tools are sequentially placed into the JACOB’S CHUCKS, and are simply rotated to bring each desired tool to the lower position aligned above the hole.

Answer 21

TURRET DRILL
(TURRET/CAPSTAN)

Question 22

Lining up of several drill presses in a row

Answer 22

MULTIPLE SPINDLE DRILLING MACHINES/ GANG DRILLING

Question 23

Custom made attachments for specific applications, usually driven by the single spindle of a Stand Drill or Radial Arm.

Answer 23

MULTI SPINDLE DRILL HEAD ATTACHMENTS

Question 24

A single point cutting tool on the end of a long rod

Answer 24

BORING BAR

Question 25

Another way of making a large hole. A smaller hole is predrilled, then a bar is used to remove material from the walls, thereby opening up the diameter

Answer 25

BORING

Question 26

One of the earliest machines that could cut non round shapes. Only capable of cutting flat surfaces. Used to reduce the thickness of bar stock, cut straight grooves, or produce linear steps.

Answer 26

SHAPING MACHINE/SHAPER

Question 27

Operations performed on a SHAPER

Answer 27

Horizontal Cutting Vertical Cutting Inclined Cutting Irregular Cutting

Question 28

"Big Brother" of the SHAPER, which can make huge cuts of metal. Keeps the cutting tools stationary and brings the material to them.

Answer 28

PLANING MACHINE/PLANER

Question 29

Linear cutting process that uses a long and slender tool which is slightly tapered.

Answer 29

BROACHING

Question 30

One of the most common broaching operations

Answer 30

Creation of KEYWAYS in shaft hubs

Question 31

Rectangular BROACH with teeth only along one side

Answer 31

KEYWAY BROACH

Question 32

OAL

Answer 32

Overall Length

Question 33

Placed in the hole to guide the broach as it is pushed through

Answer 33

Collared Keyway Bushing

Question 34

Used after each stroke in BROACHING to create deeper cuts

Answer 34

Keyway Broach Shims

Question 35

Type of broaching where both the cutter and the workpiece rotate at the SAME speed in the SAME direction.

Answer 35

ROTARY BROACHING

Question 36

what is the wobble angle in broaching?

Answer 36

1 degree

Question 37

Rotary Broaches can also be used in a

Answer 37

DRILL PRESS/ MILL with a stationary workpiece

Question 38

Short, stubby cutters that have the required cross-sectional geometry and a large degree angle. Cutters capable of creating blind, polygonal holes in a workpiece.

Answer 38

ROTARY BROACHING BITS