MACH Reading Section 3 Unit 1-6

____ cutters are used for light cutting of wire and pins.

Diagonal

A dimension shown on a print is called a ____ size.

basic

The ____ is the peak of one thread and creates the points from which the major diameter is measured.

crest

The ____ is used to draw circles, radii, and arcs.

divider

To finish a part to the final dimension and obtain a better finish, use a ____ filing technique.

draw

Wheel ____ are used to dress aluminum oxide wheels.

dressers

If the tap is somewhat intact, a tap ____ may be used to remove a broken tap.

extractor

For inch series threads, the ____ number shown is the nominal major diameter of the thread.

first

Blade ____ is the spacing of teeth from one tooth to the next.

pitch

A ____ test is performed by suspending the wheel through its hole on a finger or other object and then tapping it lightly with something dense but nonmetallic such as a screwdriver handle.

ring

The ____ is the valley between threads and creates the points from which the minor diameter is measured.

root

The most common tool used to mark straight layout lines is the ____.

scriber

The ____ gage is made up of a base and a scriber mounted on a spindle that can be adjusted to different positions by a swivel bolt and fine adjustment screw.

surface

The____ protractor can be used to lay out angles with an accuracy of 5 minutes (1/12 of a degree).

vernier bevel

____ wheels are gray in color and can be used on pedestal and tool grinders.

Aluminum oxide

____ increases the diameter of a hole to a certain depth in order to allow a screw head or nut to be positioned flush with or below the workpiece surface.

Counterboring

____ lines and dimension lines are used together.

Extension

____ are brushes used to clean files.

File cards

____ hammers are used when a soft, yet more durable striking surface is needed.

Nylon

____ screwdrivers are used when you don't have enough room to use a screwdriver with a straight shank.

Offset

The ____ wrench is a versatile tool but must be properly adjusted to fit the fastener snugly in order to avoid damage to equipment and injury to you.

adjustable

In machining, a(n)_____ is the minimum amount of clearance, or the maximum amount of interference, between two mating parts.

allowance

A ____ tolerance allows a dimension to vary both above and below basic size.

bilateral

The ____ is used to find the center of a cylindrical part.

center head

An object can be cut along an imaginary line by a ____ line to create a special type of view called a section view.

cutting plane

The ____ punch can be used to mark the intersections of lines that locate the center points of circles or arcs.

prick

____ blades can be run at higher speeds than carbon steel blades.

Bimetal

____ wrenches are made with a socket shaped like a box-end wrench in a hollow cylinder on one end and a square hole for attachment to a handle in the other end.

Socket

____ is the process of machining a flat spot on a rough surface surrounding a hole opening so that bolts, nuts, and washers will be properly seated when tightened.

Spotfacing

The ____ is the view that normally shows the most details.

front view

The ____ is the curved area at the root of a saw tooth in which the metal chips are formed into curls.

gullet

The ____ gage is used with a surface plate to measure and mark off horizontal lines in precision layout work.

height

The narrow slot produced when sawing is called the ____.

kerf

When teeth become clogged with the material you are removing, it is called ____.

loading

When pliers with a very high gripping power are needed, adjustable ____ pliers are used.

locking

The ____ hacksaw's cutting action is achieved by drawing a saw blade back and forth across a workpiece.

power

A(n) ____ has small groups of teeth with an alternate tooth set, but places a tooth with a neutral set in between them.

raker set

Every other tooth on a ____ blade has been omitted.

skip tooth

____ are useful for holding parts square and steady during layout operations.

Angle plates

____ hammers are made in a variety of sizes based on the weight of the head.

Ball peen

The ____ has a screw to clamp the workpiece in place.

C-clamp

____ lines are used to specify sizes.

Dimension

____ is the process of using a cylindrical rotating cutting tool that is sharpened on its end to create a hole.

Drilling

____ are thick, precision, washer-like discs that should be the correct size and used on each side of the wheel.

Flanges

____ tolerances are not related to other features, so their feature control frames will not contain datums.

Form

____ uses symbols to show tolerances of form, profile, orientation, location, and runout.

GD&T

____ taps have straight flutes with a special angle ground on their ends.

Gun

____ tolerances are used to specify the location of features related to other features.

Location

____ diameter the imaginary diameter measured where the thickness of the thread and space within the groove are equal.

Pitch

____ is the distance from a point on one thread to the same point on the adjacent thread.

Pitch

____ taps are the most general purpose of the three chamfer types and they are either used by themselves or after a taper tap when it is necessary to thread deeper.

Plug chamfer

____ is the process of finishing a hole to a precise size with a smooth finished surface.

Reaming

For inch series threads, the ____ has established dimensional standards for the consistent interchange of threaded parts.

Unified Thread Standard

A(n) ____ has teeth set in a pattern in which every other tooth switches the side of the blade it is set to.

alternate set

Countersinking is also frequently performed to create a ____ at the opening of a hole to allow easier entry of pins, aid in starting taps, and for deburring.

chamfer

The ____ is the largest diameter of a thread.

major diameter

An internal thread is cut in the inside diameter of a workpiece with a cutting tool called a(n) ____.

tap

The recommended drill bit size for a hole prior to tapping is called the____ drill size.

tap

A ____ is a spiral groove made on a round external or internal diameter.

thread

Within a thread system, various diameters and pitch combinations are defined as standard. These combinations are called ____.

thread series

____ blades are the least expensive type of blade, but must be run at slower speeds than blades made of harder materials.

Carbon steel

____ lines are thin and are broken into alternating long and short dashes.

Center

____ is the process of cutting a tapered opening in a hole so that a flathead screw can be installed flush with the workpiece surface.

Countersinking

____ hammers are soft face hammers that are frequently used by machinists to seat workpieces on parallels in machine vises.

Dead blow

____ removes sharp raised edges from workpieces.

Deburring

___ is a method of representing a three-dimensional object in two dimensions using different views.

Orthographic projection

____ clamps are useful for light-duty applications such as holding small and delicate parts.

Parallel

___ are simply bars with opposite sides that are parallel within very close tolerances.

Parallels

____ lines are used to show alternate positions of a part or outlines of adjacent parts.

Phantom

____ screwdrivers have a cross-shaped tip that helps prevent slippage and come in sizes 1 to 4.

Phillips

____ hammers have heads made from tightly rolled and shaped material that offers little rebound.

Rawhide

____ tolerances are used to check for runout of diameters related to a center axis, another diameter, or perpendicular surface.

Runout

____ is the size of an actual object related to its size shown on a print.

Scale

____ pliers have broad, flat jaws and are used for gripping as well as cutting wire and pins.

Side cutting

____ wheels are green in color and are usually used on tool grinders.

Silicon carbide

____ hammers are used to strike surfaces that could easily be damaged by hard hammers.

Soft face

The solution to being able to see layout lines on rought, hard, or shiny materials is to coat the material with layout ____.

fluid

The ____ form has a positive rake angle.

hook tooth

The ____ saw is capable of cutting off large pieces of stock both quickly and accurately, holding tolerances to + or - 0.015 of an inch or better.

horizontal band

To provide a better visualization of the part, a drawing may contain a three-dimensional view called a(n) ____.

isometric view

Two main types of starter drill bits are ____ drill and combination drill bits.

spot

The ____ plate provides a reference plane for layout just as it does for measurement tasks.

surface

____ refers to the staggered arrangement of the saw teeth.

Tooth set

____ screwdrivers are used in a wide variety of assembly applications such as automobile assemblies and cutting tool mounting applications.

Torx

____ are used to lay out circles or arcs that are too large for dividers.

Trammels

A ____ is a round disc of heavy paper surrounding the center area of a grinding wheel.

blotter

The main part of a ____ saw consists of a high-speed motor that has an abrasive cutting disc mounted to its shaft.

chop

The relationship between the sizes of two mating parts is called the ____ fit.

class

Some wrenches have one box end and one open end of the same size for versatility and are called ____ wrenches.

combination

____ occurs when very hard metals are ground on the pedestal grinder and the grains of the wheel become dull more quickly than normal, so new, sharp grains are not exposed.

Glazing

____ are used to scribe lines parallel to the edge of material.

Hermaphrodite calipers

____ lines are thin and are broken into a series of short dashes.

Hidden

____ help to support the work during grinding and may be set at any desired angle to aid in grinding uniform angled surfaces on the work.

Tool rests

_____ is when a feature contains the most workpiece material within its tolerance.

MMC (Maximum material condition)

____ lines are used to show edges of an object that would be seen in any particular view.

Object

____ wrenches are light-duty wrenches with two parallel jaws that may be slid onto a hex or square drive surface.

Open-end

If a tolerance applies ____, that means that the tolerance is constant and cannot increase as the size of the feature varies from basic size.

RFS (Regardless of Feature size)

____ screwdrivers have a broad, flat tip and are made in many sizes to fit the width and thickness of the screw slot.

Straight

Multiple, identical part features or equal dimensions can also be identified as typical dimensions by adding the abbreviation ____ after a dimension.

TYP

____ grinders are generally used to sharpen lathe cutting tools.

Tool

____ blades have been developed with a constantly changing tooth pitch to help alleviate this problem on thin sections and reduce vibration during cutting.

Variable-pitch

After layout, the ____ punch can be used to enlarge the prick punch mark to aid in drilling operations.

center

A ____ tolerance does not use the "+," "-," or "±" symbol.

limit

____ wrenches are used when more torque must be applied to the fastener.

Box-end

The ____ is the angle of the saw tooth's cutting face.

rake

A ____ enables pliers to open wider in order to hold larger work.

slip joint

General-purpose hand drilling is usually done with a ____ bit.

twist drill

A ____ tolerance allows a dimension to vary either above or below basic size, but not both.

unilateral

The____ saw is common in almost every shop and is a very useful piece of equipment and gets its name from the fact that the blade is in a vertical orientation supported by two wheels.

vertical band

The advantage of the ____ protractor is that it is smaller and flatter, and this can enable angle layout in places that other protractors cannot.

plain

A(n) ____ is a plane from which dimensions are referenced

datum

A____ frame is a rectangular box with sections for the geometric tolerancing symbol, the amount of the tolerance, and the reference to a specific datum.

feature control

A ____ wrench has a hooked arm that fits into fasteners with slots..

hook spanner

A(n) ____ line is a thin angled line with an arrowhead on one end that points to a specific feature or detail.

leader

Continual use of a ____ wheel requires extreme pressure and creates excessive heat that can lead to thermal discoloration of the workpiece and discomfort as the operator holds the hot workpiece due to small pieces of material stuck in the wheel.

loaded

The jaws on ____ pliers taper toward the end to allow them to be used for holding small work.

needle nose