Machine shop Flashcards
What should never be worn during machining?
Gloves
T/F Never use compressed air without asafety nozzle to clean machines or clothing.
T
What is the most important safety rule of all while machining?
Wearing eye protection
3 types of sets of saw blades
Raker
Wavy
Alternate
What is one of the most important factors in successful band sawing?
Cutting speed
Name the 4 advantages of a circular saw
Burr-free mill finish
Extreme accuracy
Close tolerances
Safe cutting operations
What are the 2 metal classifications?
Ferrous and Non-ferrous
What is the purpose of a center punch?
Makes indentation for drill point in center to start drilling procedure.
What is not a basic layout tool?
Micrometer
What is a drill drift used for?
Removing twist drills, sleeves and sockets
What do the following stand for:
UNC
UNF
UNEF
Unified Course
Unified Fine
Unified Extra Fine
Which lathe is equipped with a multi-sided tool holder to which a number of different cutting tools can be attached?
Turret lathe
What can broaches be classified as?
Planing machines
The process often used for the final finishing to close dimensions of a part is called ____.
Surface grinding
A process where a high degree of precision and surface finish is needed is called _____.
Lapping
Name 4 parts of a drill press:
Base
Head
Spindle
Table
T/F Twist drills are usually made from carbon steel and high speed steel.
T
Name the 3 parts of a twist drill:
Body
Point
Shank
What is the normal angle for a twist drill?
118 degrees
(High/Low) speeds and (light/heavy) feeds are especially recommended for automatic drilling machines where the holes do not exceed four drill diameters in depth.
High
Light
A taper or bevel at the end of a hole is _____.
Countersinking
Why should you NOT hold a work piece by hand during drilling?
Work could bind and twist injuring hand.
What designates the size of maximum diameter of the work that can be machined in a lathe?
Swing
Name 4 basic engine lathe parts:
Apron
Compound rest
Tailstock
Ways
What are the 3 types of lathes generally used in high production and heavy duty work?
Turret
Multi-tool
Multi-spindle
CNC stands for _____.
Computer numerical control
Name 2 types of grinding:
Precision
Non-precision
What part of a lathe is where the entire unit that moves lengthwise along the ways between headstock and tailstock called?
Carriage
What is the most accurate means of chucking a work piece in a lathe?
Four-jaw
What is the lathe RPM for a piece of mild steel @ 145 SPM @ 4” diameter?
3.82 x 145
____________ = 138 RPM
4
What is the lathe RPM for a piece of aluminum @ 200 SPM @ 6” diameter?
3.82 x 200
____________ = 127 RPM
6
What is the lathe RPM for a piece of copper @ 400 SPM @ 1.5” diameter?
3.82 x 400
____________ = 1018 RPM
1.5
What is the lathe RPM for a piece of cast iron @ 80 SPM @ .75” diameter?
3.82 x 80
____________ = 407 RPM
.75
T/F Feed is the distance a tool advances into work 1/2 revolution of the headstock spindle.
F - 1 revolution
What is used to machine the ends of the work and to machine shoulders in the work?
Facing tool
In practical straight turning between centers, the cutting edge of the tool should be set at about __ degrees above center.
5
What is used to remove most of the metal?
Roughing tool
What is the distance from a point on a screw thread to a corresponding point on an adjacent thread?
Pitch
Use a dial indicator to set up a ____ chuck.
Four-jaw
T/F For right handed threads, carriage travels towards the tailstock.
F - Headstock
What is used for long pieces during boring?
Steady rest
What is the most widely used method of machining tapers on the engine lathe?
Taper attachment
Name 2 classifications of turret lathes:
Horizontal
Vertical
What are the 2 classes of the knee-and-column?
Horizontal
Vertical
What is used more frequently in tool-and-die shops than any other type?
Knee-and-column milling machine
Accuracy and durability of the machine depend on it being kept _____ and well _____.
Clean
Oiled
Name 3 methods of mounting work on milling machines:
Table
Chuck
Arbor
A dull cutter (does/does not) last as long and wear more (rapidly/slowly).
Does not
Rapidly
What raises work to drill through material without damaging a vise or table?
Parallels
