Heating above the transformation temperature and quenching usually in oil, for the purpose of increasing the hardness

Reheating to a temperature below the transformation range, followed by any desired rate of cooling to attain the desired properties of the metal.

Heating to a subcritical temperature, about 1,100 F to 1,300 F and holding at that temperature for a suitable time for the purpose of reducing internal residual stresses.

Heating to some 100 F above the transformation range with subsequent cooling to below that range in still air at room temperature to produce uniform structure of the metal

A machine tool used for producing holes in metal by the use of a cutting tool called drill.

A machine tool used to form metal parts by removing metal from a workpiece by the use of a revolving cutter with many teeth each tooth having a cutting edge which removes its share of the stock.

A machine tool used to sharpen or shape tools by using an abrasive wheel.

A machine tools used to enlarge a hole by means of an adjustable cutting tool with only one cutting edge.

A machine tool used to cut metal parts of light, medium, and large sections using a reciprocating hacksaw blade.

A machine tool used to machine flat or plane surface with a single point cutting tool.

A machine tool used for production of flat surfaces on pieces too large or too heavy to hold in a sharper:

A machine tool used to finish internal or external surfaces, such as holes or keyways by the use of a cutter called a broach, which has a series of cutting edges or teeth.

An alloy of copper and tin.

An alloy of copper and zinc.

The process of forming metal parts by the use of dies after the metal is heated to its plastic range.

The process of forming a metal parts by the use of a powerful pressure from a hammer or press to obtain the desired shape, after the metal has been heated to its plastic range.

A manganese steel containing approximately 0.20% carbon.

A machine tool in which metal is removed by means of a revolving cutter with many teeth, each tooth having a cutting edge which remove its share of the stock.

A metal turning machine tool in which the work, while revolving on a horizontal axis, is acted upon by a cutting tool which is made to move slowly (feed) in a direction more or less parallel to the axis of the work (longitudinal feed).

A machine tool used in the production of flat surfaces on pieces too large or too heavy or, perhaps too awkward to hold in a shaper.

It consists of shaping a piece by bringing it into contact with a rotating abrasive wheel.

A tool used in measuring diameters.

Used to true and align machine tools, fixtures, and works, to test and inspect size trueness of finished work, and to compare measurements either heights or depths of many other measurements.

The ability of metal to be deformed considerably without rupture.

The shop term used to include the marking or inscribing of center pints, circles, arcs, or straight lines upon metal surfaces, either curved or flat, for the guidance of the worker.

An operation of sizing and finishing a hole by means of a cutting tool having several cutting edges.

The operation of making a cone-shaped enlargement of the end of a hole, as for a recess for a flat head screw.

The operation of enlarging a hole by means of an adjustable cutting tool with only one cutting edge.

An imaginary circle passing through the points at which the teeth of the meshing gears contact each other.

A type of bolt intended for use in bolting wooden parts together or wood to metal. It has a short portion of shank just underneath a round head, which is designed to keep the bolt from turning in the wood when the nut is tightened.

The number of teeth per inch of pitch diameter and which gives some of indications of the size of the gear teeth.

The distance from the center of one tooth of a gear to the center of the next consecutive tooth measured on the pitch.

The portion of a gear tooth that projects above or outside the pitch circle

The portion of the gear tooth space that is cut below the pitch circle and is equal to the addendum plus the clearance

When meshed with a gear, it is used to change rotary motion to reciprocating motion.

A kind of gears used for heavy duty works where a large ratio of speed is required and are extensively used in speed reducers.

A kind of gears used to transmit motion from one shaft to another shaft at an angle to the first.

The uniform heating of steel above the usual hardening temperatures, followed by cooling freely in air.

The operation of cooling a heated piece of work rapidly by dipping it in water, brine or oil

A method used in softening a piece of metal that is too hard to machine and is done by heating steel slowly above the usual hardening temperature, keeping it a the heat for 1/2 to 2 hours, then cooling, slowly, preferably in a furnace.

The total permissible variation in the size of a dimension; the difference between the limits of size.

The operation of machining the end of a workpiece to make the end square with the axis

The clearance between the tooth profiles of a gear tooth

A mechanism which usually do the indexing in a machine tool.

A material that can wear away a substance softer than itself

A cylindrical bar of steel with threads formed around it and grooves or flutes running lengthwise in it, intersecting with the threads to form cutting edges. It is used to cut internal threads.

A set of gages consisiting of thin strips of metal of various thickness mounted in a steel case or holder and is widely used for measuring and checking clearnaces.

A machine tool which is very similar to a shaper except that the ram reciprocates vertically rather than horizontally

A machine tool used principally used to machine flat or plane surfaces with single-point cutting tool.

A kind of bolts which has no head an instead has threads on both ends.

A kind of chuck which has reversible jaws which could be adjusted separately.

A tool which when pressed into a finished hole in a piece of work, provides centers on which the piece may be turned or otherwise machined.

A kind of chuck which should not be used where extreme accuracy is required

The process of checking or producing checkers on the surface of a piece by rolling checkered depressions into the surface.

It fits into the main spindle of a lathe and is sol called because it acts as a bearing surface on which the work rests. It revolves with the work. When compared with the hardness of the dead center in the tailstock, it is usually soft, and is so made since it does no work.

A gripping device with two or more adjustable jaws set radially.

Steel balls for ball bearings are manufactured by

Addendum of a cycolidal gear tooth is

In a lathe, it comprised the main spindle, the necessary mechanism for obtaining the various spindle speed and also certain gears which are used to operate the quick change gear mechanism.

The process of heating a piece of steel to a temperature within or above critical and cooling rapidly.

Welding operation in which a non-ferrous filler metal melts at a temperature below that of the metal joined but is heated above 450 C.

Uniting two pieces of metal by means of a different metal which is applied between the two in molten state.

Fusing process in which the metal is heated into a state of fusion permitting it to flow together into a solid joint

Joining metal by means of high current at low voltage. Druing the passage of current, pressure by the electrodes produces a forge weld.

A device for accurately measuring diameters

A group of thin steel strips for measuring clearances.

A hand tool used to measure engine crank web deflections.

A hand tool used to measure tension on bolts

The permissible variation int the size of a dimension the difference between the limits of size.

A gear with teeth on the outer cylindrical surface

The diameter of a circle coinciding with the top of the teeth of an internal geear

A circle coinciding with a tangent to the bottom of the tooth space

The total depth of a tooth space, equal to addendum plus dedendum.

The depth of tooth space below the pitch circle

The of gear teeth to each mm pitch diamter

A machine tool used in which abrasive wheel is used as cutting tool to obtain a very smooth finish.

It is used to produce a variety of surfaces by using a circular-type cutter with multiple teeth.

It is used principally to machine flat or plane surfaces with a single-point tool.

Cutting a hole by means of rotating tool or the work may revolve and to the tool remain fixed as in the lathe

One of the following is not a tap used for cutting threads in holes.

An index or dividing head

Galvanized iron is a term referring to iron coated with:

The moment of inertia of a rectangle whose base is "b" and height "h" about its base is:

In usual spur gearing:

A stainless steel is obtained principally by the used of the following alloying element

One of the following is not a common term relating to the classification of fits.

Hearingbone gears are gears which

Internal stresses existing in a welded connection:

In general the design stress and factor of safety are related as follows:

A group of thin steel strips for measuring clearances.

A hand tool used to measure tension on bolts.

A material that can wear away a substance softer than itself

The material used in high speed processes.

An alloy of copper and zinc

An alloy of copper, tin and small amount of phosphorous.

The process of working metals by the application of sudden blows or by steady pressure.

A welding operation in which a non-ferrous filler metal melts at a temperature below that of the metal joined but is heated above 450 C.

The operation of cooling a heated piece of work rapidly by dipping it in water, brine or oil.

A machine tool used to machine flat surfaces