Instruments and gauges- Terms
ACME THREAD GAUGE
A gauge used for checking and testing the 29° angle and the width at the end of a thread cutting tool while grinding it. It is also used for setting the tool square with the axis of the workpiece.
A gauge used for checking and testing the 29° angle and the width at the end of a thread cutting tool while grinding it. It is also used for setting the tool square with the axis of the workpiece.
29 ° 각도와 너비를 확인하고 테스트하는 데 사용되는 게이지는 나사 절삭 공구 끝을 연마하는 동안 사용됩니다. 공작물의 축
ANGLE PLATES
Some work has to be set at a particular angle to the surface of the table, and this is often effected by bolting it to an adjustable angle plate.
Some work has to be set at a particular angle to the surface of the table, and this is often effected by bolting it to an adjustable angle plate.
ARDOMETER
A type of total radiation pyrometer.
A type of total radiation pyrometer.
BORING BAR MICROMETER
On boring operations, it is often necessary to adjust the cutter setting by a few thousandths of an inch. With this, it is possible to determine exactly the depth of cut taken.
On boring operations, it is often necessary to adjust the cutter setting by a few thousandths of an inch. With this, it is possible to determine exactly the depth of cut taken.
CALIPER
Instrument used for measuring distances between or over surfaces, or for comparing dimensions of workpiece with such standards as plug gauges, graduated rules etc.
Instrument used for measuring distances between or over surfaces, or for comparing dimensions of workpiece with such standards as plug gauges, graduated rules etc.
CENTRE SQUARE
is intended for marking the centres of round or square stock.
is intended for marking the centres of round or square stock.
CLINOMETER
Instrument used for measuring angles relative to the horizontal plane.
Instrument used for measuring angles relative to the horizontal plane.
DEPTH GAUGE
Gauge used for the purpose of measuring the distance between two surfaces, to find or check the depth of a counterbored hole, a recess etc.
Gauge used for the purpose of measuring the distance between two surfaces, to find or check the depth of a counterbored hole, a recess etc.
DIAL GAUGE
Instrument indicating the movement of a projecting plunger by the movement of a hand or pointer over a graduated dial.
Instrument indicating the movement of a projecting plunger by the movement of a hand or pointer over a graduated dial.
DIAL SHEET GAUGE
Gauge fitted with a dial or clock for measuring or comparing the thickness of sheet metal plates.
Gauge fitted with a dial or clock for measuring or comparing the thickness of sheet metal plates.
DIVIDERS
These are essentially scribers for marking arcs, and circles, hence their points are hard and sharp. They are used for dividing distances into a number of equal parts. Also used for transferring dimensions from a rule to the work.
These are essentially scribers for marking arcs, and circles, hence their points are hard and sharp. They are used for dividing distances into a number of equal parts. Also used for transferring dimensions from a rule to the work.
DRILL GAUGE
Tool for measuring the size of drills.
Tool for measuring the size of drills.
DRILL GRINDING GAUGE
A tool for checking the angle and length of the cutting lips on a twist drill while grinding it. Also it may be called a drill point gauge or a drill angle gauge.
A tool for checking the angle and length of the cutting lips on a twist drill while grinding it. Also it may be called a drill point gauge or a drill angle gauge.
ENGINEERS TAPERS
They are intended for measuring hole sizes, slot widths, caliper settings and so on.
They are intended for measuring hole sizes, slot widths, caliper settings and so on.
FEELER GAUGES
Consist of a number of thin metal blades, each of a different thickness and in the desired number of dimensional steps. They are used for checking clearances.
Consist of a number of thin metal blades, each of a different thickness and in the desired number of dimensional steps. They are used for checking clearances.
FIRTHS HARDOMETER
Instrument for measuring the hardness of materials, particularly metals.
Instrument for measuring the hardness of materials, particularly metals.
GAUGE
A tool or instrument for checking or measuring the sizes of metal parts to determine whether the dimensions are within the specified limits.
A tool or instrument for checking or measuring the sizes of metal parts to determine whether the dimensions are within the specified limits.
GAUGE BLOCKS
They are used mostly for reference in setting gauges and for accurate measurement in tool, gauge, and die manufacture.
They are used mostly for reference in setting gauges and for accurate measurement in tool, gauge, and die manufacture.
HEIGHT GAUGE
Marking out or measuring tool designed on the lines of a scribing block, but capable of more accurate duty.
Marking out or measuring tool designed on the lines of a scribing block, but capable of more accurate duty.
HERMOPHRODITE CALIPER
A caliper having one leg similar to that of an inside caliper, while the other leg is pointed like a divider leg.
A caliper having one leg similar to that of an inside caliper, while the other leg is pointed like a divider leg.
HOOK RULE
A steel rule with a projecting piece or hook at one end at right angles to the edge of the rule.
A steel rule with a projecting piece or hook at one end at right angles to the edge of the rule.
INDICATING INSTRUMENTS
The instruments that provide visual observation of readings, such as pressure gauges, draft gauges, fuel oil meters and thermometers for fuel, feed water and flue gas temperatures etc.
The instruments that provide visual observation of readings, such as pressure gauges, draft gauges, fuel oil meters and thermometers for fuel, feed water and flue gas temperatures etc.
INDICATOR
A sensitive instrument which shows slight variations when testing the trueness, or alignment of a workpiece, fixture or machine part such as a milling vice. Dial indicators may be graduated to read small linear variations.
A sensitive instrument which shows slight variations when testing the trueness, or alignment of a workpiece, fixture or machine part such as a milling vice. Dial indicators may be graduated to read small linear variations.
INSIDE VERNIER CALIPER
It is intended mainly for checking internal dimensions, such as the diameter of bores, and so on. Vernier protractor is used for measuring angles accurately. JO BLOCKS – These refer to Johansson precision gauge blocks.
It is intended mainly for checking internal dimensions, such as the diameter of bores, and so on. Vernier protractor is used for measuring angles accurately. JO BLOCKS – These refer to Johansson precision gauge blocks.
KNIFE EDGE VERNIER CALIPER
It has jaws which are reduced to a very narrow edge. These are useful for measuring in restricted places or on curved surfaces.
It has jaws which are reduced to a very narrow edge. These are useful for measuring in restricted places or on curved surfaces.
LEVEL, HYDROSTATIC
U tube device employed during the levelling and setting of work too long for the use of a spirit level.
U tube device employed during the levelling and setting of work too long for the use of a spirit level.
LEVEL, SPIRIT
Instrument consisting essentially of a small sealed glass tube containing spirit (alcohol or ether) so mounted that the enclosed bubble of air occupies a central position only when the instrument is placed horizontally.
Instrument consisting essentially of a small sealed glass tube containing spirit (alcohol or ether) so mounted that the enclosed bubble of air occupies a central position only when the instrument is placed horizontally.
LIMIT GAUGE
A gauge that represents a limiting (maximum and minimum) size within which the work will be acceptable.
A gauge that represents a limiting (maximum and minimum) size within which the work will be acceptable.
MICROMETER
A precision, screw adjusted measuring instrument with which dimensions can be read in thousandths and ten thousandths of an inch.
A precision, screw adjusted measuring instrument with which dimensions can be read in thousandths and ten thousandths of an inch.
MICROMETER COLLAR
A dial on the screw of a machine to indicate the extent of the movement of the screw or parts attached to the screw and usually graduated to read thousandths of an inch.
A dial on the screw of a machine to indicate the extent of the movement of the screw or parts attached to the screw and usually graduated to read thousandths of an inch.
MICROMETER DEPTH GAUGE
The ordinary depth gauge has been elaborated by the addition of a micrometer head.
The ordinary depth gauge has been elaborated by the addition of a micrometer head.
MINNIMETER
Delicate form of indicator showing the movement of a projecting plunger usually placed at one end
Delicate form of indicator showing the movement of a projecting plunger usually placed at one end
ODD LEG
Caliper having one leg bent inwards at its ends, like the two legs on a pair of inside calipers, the other leg being pointed or having a separate hardened point attached to it.
Caliper having one leg bent inwards at its ends, like the two legs on a pair of inside calipers, the other leg being pointed or having a separate hardened point attached to it.
OPTICAL FLAT
Plate generally made of glass or quartz and used as a standard of reference as a flat surface.
Plate generally made of glass or quartz and used as a standard of reference as a flat surface.
OPTICAL PROTRACTOR
Angle measuring instrument fitted with a scale read by an optical magnifying device.
Angle measuring instrument fitted with a scale read by an optical magnifying device.
PARALLEL BLOCK
Steel or cast iron block used when setting up work for machining, marking
Steel or cast iron block used when setting up work for machining, marking
PIN GAUGES
End measuring pins for determining bore diameters.
End measuring pins for determining bore diameters.
PLUG GAUGE
A gauge on which the outside measuring surfaces are designed to test the specified dimensions of holes. May be straight or tapered, plain or threaded, and of any cross-sectional shape.
A gauge on which the outside measuring surfaces are designed to test the specified dimensions of holes. May be straight or tapered, plain or threaded, and of any cross-sectional shape.
PLUMB BOB
Weight hung on the end of a cord so that when the latter is supported at its top end the cord will hang vertical.
Weight hung on the end of a cord so that when the latter is supported at its top end the cord will hang vertical.
PNEUMATIC MICROMETER
An instrument designed to measure, among other things, the errors in the size, shape and alignment of bores, with compressed air.
An instrument designed to measure, among other things, the errors in the size, shape and alignment of bores, with compressed air.
PROTRACTOR
Instrument graduated so as to enable the measurement of angles to be made in degrees.
Instrument graduated so as to enable the measurement of angles to be made in degrees.
PYROMETER
Specified type of thermometer used to measure high temperatures in the production and heat treatment of metals and alloys.
Specified type of thermometer used to measure high temperatures in the production and heat treatment of metals and alloys.
RADIUS GAUGE
Tool used for checking the radius of small fillets or rounded corners.
Tool used for checking the radius of small fillets or rounded corners.
RECORDING INSTRUMENTS
Instruments which provide a permanent record of readings such as steam pressure, steam flow, air flow, flue gas temperature, feed water temperature, fuel flow and fuel temperature.
Instruments which provide a permanent record of readings such as steam pressure, steam flow, air flow, flue gas temperature, feed water temperature, fuel flow and fuel temperature.
RING GAUGE
A gauge in which the inside measuring surfaces are circular in form. A ring gauge may be cylindrical or conical, plain or threaded.
A gauge in which the inside measuring surfaces are circular in form. A ring gauge may be cylindrical or conical, plain or threaded.
SCLEROSCOPE
Instrument for measuring hardness.
Instrument for measuring hardness.
SCREW GAUGE
Type of gauge for checking the accuracy of a screw thread.
Type of gauge for checking the accuracy of a screw thread.
SCREW PITCH GAUGE
A small tool with a number of blades, each having the same number of notches per inch as the thread it represents. It is used to find the pitch and number of threads per inch on a screw, tap or die.
A small tool with a number of blades, each having the same number of notches per inch as the thread it represents. It is used to find the pitch and number of threads per inch on a screw, tap or die.
SCREW THREAD MICROMETER
Type of micrometer with measuring points specially shaped to enable the measurement of pitch diameter and thickness of thread.
SCRIBER
Used for making lines on the work when marking off.
Type of micrometer with measuring points specially shaped to enable the measurement of pitch diameter and thickness of thread.
SCRIBER
Used for making lines on the work when marking off.
SINE BAR
Tool used for the accurate setting out of angles by arranging to convert angular measurements to linear ones.
Tool used for the accurate setting out of angles by arranging to convert angular measurements to linear ones.
SLIP GAUGE
Form of gauge made of hardened steel with two parallel faces worked to high precision and at a known distance apart.
Form of gauge made of hardened steel with two parallel faces worked to high precision and at a known distance apart.
SNAP GAUGE
A type of fixed gauge, plain or adjustable, arranged with inside measuring surfaces for checking diameters, lengths, thicknesses or widths of workpieces.
A type of fixed gauge, plain or adjustable, arranged with inside measuring surfaces for checking diameters, lengths, thicknesses or widths of workpieces.
SPRING CALIPERS
Inside or outside calipers for measuring workpieces in which the tension against the nut is maintained by a circular spring at the end.
Inside or outside calipers for measuring workpieces in which the tension against the nut is maintained by a circular spring at the end.
STEEL RULE
A thin flat measuring tool graduated in either fractional or decimal part of an inch or cm and made in many styles and lengths.
A thin flat measuring tool graduated in either fractional or decimal part of an inch or cm and made in many styles and lengths.
STRAIGHT EDGE
Strip of metal, usually steel, with one edge straight, used to determine the flatness of a surface.
Strip of metal, usually steel, with one edge straight, used to determine the flatness of a surface.
SURFACE
GAUGE
Tool used for marking out and setting up work in conjunction with a surface plate, used also for levelling workpieces when fixing them to the worktables of machine tools e.g., planers, shapers, millers etc.
Tool used for marking out and setting up work in conjunction with a surface plate, used also for levelling workpieces when fixing them to the worktables of machine tools e.g., planers, shapers, millers etc.
TAPER PLUG
GAUGE
A solid internal gauge in the form of a frustrum of a cone having diameter, taper and length suitable for measuring the dimensions of an internal taper of specified size.
A solid internal gauge in the form of a frustrum of a cone having diameter, taper and length suitable for measuring the dimensions of an internal taper of specified size.
TAPER RING GAUGE
An external gauge, the internal diameter of which confirms to the frustrum of a cone having diameter, taper and length suitable for measuring the dimensions of an external taper of specified size.
An external gauge, the internal diameter of which confirms to the frustrum of a cone having diameter, taper and length suitable for measuring the dimensions of an external taper of specified size.
TEMPLATE
A flat pattern or guide plate usually made from sheet metal and used as a gauge or guide when laying out, drilling, forming in a machine or filing irregular shapes on metal workpieces
A flat pattern or guide plate usually made from sheet metal and used as a gauge or guide when laying out, drilling, forming in a machine or filing irregular shapes on metal workpieces
.
TELESCOPING GAUGES
Adjustable gauges which consists of a handle attached to a fixed contact within which a plunger contact expands or telescopes under spring tension when the gauge is inserted into the hole that is to be measured.
Adjustable gauges which consists of a handle attached to a fixed contact within which a plunger contact expands or telescopes under spring tension when the gauge is inserted into the hole that is to be measured.
THREAD GAUGE
Tool for checking the form and pitch of screw threads.
Tool for checking the form and pitch of screw threads.
TOOL MAKERS MICROSCOPE
Instrument used in accurate inspection of thread forms, form tools and complex contours.
Instrument used in accurate inspection of thread forms, form tools and complex contours.
TORQUE
METER
Torsion measuring device fitted to a rotating shaft or component to measure the torque developed at any given moment under actual running conditions.
Torsion measuring device fitted to a rotating shaft or component to measure the torque developed at any given moment under actual running conditions.
TORSIOGRAPH
Instrument used to measure and record the amplitude and frequency of torsional vibrations in a rotating shaft or other part.
Instrument used to measure and record the amplitude and frequency of torsional vibrations in a rotating shaft or other part.
TRAMMELS
They are generally used for laying off and checking dimensions of several feet, they are generally used in conjunction with a large steel rule, which may be from 3 to 10 ft long.
They are generally used for laying off and checking dimensions of several feet, they are generally used in conjunction with a large steel rule, which may be from 3 to 10 ft long.
TRANSFER CALIPER
A caliper designed to take measurement in recesses or over a projection. One leg can be separated or opened to remove the caliper and then returned to the measured size.
A caliper designed to take measurement in recesses or over a projection. One leg can be separated or opened to remove the caliper and then returned to the measured size.
TRY SQUARE
Instrument used for setting and checking a line, an edge or a face which is required to be at right angles to some other plane which should be regarded as a datum or reference plane.
Instrument used for setting and checking a line, an edge or a face which is required to be at right angles to some other plane which should be regarded as a datum or reference plane.
VACUUM
GAUGE
Gauge used to measure the amount of vacuum in any vessel in which a pressure lower than atmospheric pressure is produced by evacuation of air, vapour and gas.
Gauge used to measure the amount of vacuum in any vessel in which a pressure lower than atmospheric pressure is produced by evacuation of air, vapour and gas.
VERNIER
Small-scale, for making accurate measurement, carrying a certain number of graduations equalling in their combined length a different number of graduations, usually one more or one less, on the main scale of the instrument to which the vernier is attached.
Small-scale, for making accurate measurement, carrying a certain number of graduations equalling in their combined length a different number of graduations, usually one more or one less, on the main scale of the instrument to which the vernier is attached.
VERNIER CALIPER
Precision measuring instrument consisting of a beam or rule having a fixed jaw at one end, and a straight jaw to which is attached a vernier scale.
Precision measuring instrument consisting of a beam or rule having a fixed jaw at one end, and a straight jaw to which is attached a vernier scale.
WATER
GAUGE
A gauge that shows the proper water level which must be maintained in a boiler to avoid overheating damage.
A gauge that shows the proper water level which must be maintained in a boiler to avoid overheating damage.
WIRE GAUGE
Sizes of standard wire and sheet metal are normally expressed not by a dimension in cm, but by a number or gauge size.
Sizes of standard wire and sheet metal are normally expressed not by a dimension in cm, but by a number or gauge size.
WHITWORTH GAUGE
Type of plug, and caliper gauge introduced by Joseph Whitworth.
Type of plug, and caliper gauge introduced by Joseph Whitworth.
WICKMAN GAUGE
Special form of adjustable snap or horse shoe type of gap gauge.
Special form of adjustable snap or horse shoe type of gap gauge.
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