Term
| What is a Cylindrical Plug Gauge used for? How do you tell what end is GO and what end is NO-GO |
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Definition
| A Cylindrical PLUG gauge is used to check the diameter of a BORE. The longer end of the tool will be the GO end, while the shorter end is NO-GO. The longer end should be able to slide into a bore without being forced and the NO-GO should not be able to fit. |
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Term
| What is a Plain Ring Gauge used for? How do you tell if it is a GO or NO-GO ring gauge? |
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Definition
| A plain RING gauge is used to check the diameter of a SHAFT. The NO-GO gauge will be identified by a ring-shaped groove cut into the knurled surface of the gauge. The GO gauge should fit over the shaft, the NO-GO Gauge should NOT fit over the shaft. |
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Term
| What do Tapered Plug Gauges check? How do you use it? |
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Definition
| The tapered PLUG gauge checks the diameter and angle of a tapered BORE. To use this tool you want to apply thin stripes of Prussian blue to a clean gauge. Insert the gauge into a clean workpiece until it is well seated. Check to see if the end of the workpiece falls between the two limit lines on the end of the gauge. If so the taper is the correct diameter. To check the angle turn the gauge one-quarter turn COUNTER-CLOCKWISE. Remove the gauge and inspect the Prussian blue. If it is smeared evenly along its length the bore has the correct angle. If more blue is smeared at one end than the other the taper angle must be adjusted. |
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Term
| What do Tapered Ring Gauges check? How do you use it? |
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Definition
| The tapered RING gauge checks the taper and angle of a tapered SHAFT. To use this tool you want to apply thin stripes of Prussian blue to a clean workpiece. Insert the workpiece into a clean ring gauge until it is well seated. Check to see if the end of the workpiece falls between the two limit steps on the end of the gauge. The workpiece should pass the first lip of the end of the gauge but not the second. If so the taper is the correct diameter. To check the angle turn the workpiece one-quarter turn COUNTER-CLOCKWISE. Remove the workpiece and inspect the Prussian blue. If it is smeared evenly along its length the shaft has the correct angle. If more blue is smeared at one end than the other the taper angle must be adjusted. |
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Term
| What is a Thread Plug Gauge used for? How do you tell what end is GO and what end is NO-GO |
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Definition
| A thread PLUG gauge is used to check the accuracy of a threaded hole. The longer end of the tool will be the GO end, while the shorter end is NO-GO. The longer end should be able to thread into the threaded hole easily and completely. If not the hole is too small. The NO-GO end should not enter beyond the third thread, if it does the threaded hole is too large. |
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Term
What is a Thread Ring Gauge used for?
How do you tell if it is a GO or NO-GO thread ring gauge? |
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Definition
| A thread RING gauge is used to check the accuracy of an outside thread. The NO-GO gauge will be identified by a ring-shaped groove cut into the knurled surface of the gauge. The GO thread ring gauge should easily and completely slide over the outside thread. The NO-GO thread ring gauge should not be able to slide over more than 3 threads, if it does the outside thread is too small. |
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Term
| How is a snap gauge used? |
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Definition
| A snap gauge has two anvils on the tool. When set up the outside anvil should be able to easily slide over the part but the inside anvil should not be able to slide over. |
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Term
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Definition
| The basic size is the theoretical perfect size a part or feature can be before tolerances are added. |
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Term
| What is the limits of size? |
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Definition
| The limits of size is the biggest and smallest a part or feature can be and still be acceptable. |
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Term
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Definition
| Tolerance is the total variance permitted in a part or features size. It's the difference between the upper and lower limits of size. |
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Term
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Definition
| Allowance is the intentional difference between two mating parts. It is determined by the largest shaft and the smallest hole(Maximum Material Condition) |
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Term
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Definition
| A clearance fit is when the largest shaft is smaller than the smallest hole |
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Term
| What is a Interference/Press fit? |
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Definition
| A interference or press fit is when the largest hole is still smaller than the smallest shaft |
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Term
| What is a transition fit? |
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Definition
| A transition fit occurs with random selection of mating parts and results in either an interference or clearance fit. |
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Term
| All types of metals are effected by tempature in the same way. True/False |
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Definition
| False, Different types of metals expand and contract at different rates. This rate is called the coefficient of expansion and is expressed in expansion over a distance of one inch per degree. |
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Term
On a cylindrical plug gauge the smaller diameter is called the:
a) NO-GO gauge
b) GO gauge
c) upper limit
d) allowance |
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Definition
| b) On a cylindrical plug gauge the smaller diameter is called the go gauge. |
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Term
A NO-GO ring gauge is easily identified by
a) the way it enters the hole
b) the flat that has been ground on its surface
c) the diameter stamped on the body
d) an annular ring in the knurled surface. |
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Definition
| d) A NO-GO ring gauge is easily identified by an annular ring in the knurled surface. |
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Term
When checking a tapered hole with a taper plug gauge:
a) machine the gauge if it does not fit
b) rotate the gauge clockwise for one quarter turn
c) rotate the gauge counter-clockwise for one quarter turn
d) tap the gauge lightly to spread the Prussian blue |
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Definition
| c) When checking a tapered hole with a taper plug gauge rotate the gauge counter-clockwise for one quarter turn. |
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Term
When checking an internal thread with a thread plug gauge
a) never force the gauge into the thread
b) use a strap wrench to turn the thread in
c) put Prussian blue on the gauge to check the fit
d) the NO-RING gauge will not fit |
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Definition
| a) When checking an internal thread with a thread plug gauge never force the gauge into the thread. |
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Term
A snap gauge which measures how much a part varies from the basic size is called a:
a) micrometer snap gauge
b) direct reading snap gauge
c) transfer type snap gauge
d) dial indicator snap gauge |
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Definition
| d) A snap gauge which measures how much a part varies from the basic size is called a dial indicator snap gauge. |
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Term
In the designation 1.250 ± 0.004 the tolerance is
a) 0.004"
b) 0.008"
c) 1.254"
d) 1.246" |
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Definition
| b) In the designation 1.250 ± 0.004 the tolerance is 0.008". |
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Term
In the designation 2.500 ± 0.003 the basic size is
a) 2.500"
b) 2.503"
c) 2.497"
d) 0.003" |
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Definition
| a) In the designation 2.500 ± 0.003 the basic size is 2.500" |
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Term
The permissible variation of a part size is called the:
a) allowance
b) tolerance
c) limits
d) fit |
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Definition
| b) The permissible variation of a part size is called the tolerance |
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Term
The limits of size:
a) can be defined as the tolerance
b) allow a clearance fit to occur between mating parts
c) are the maximum and minimum permissible dimensions of a part
d) are the difference between the upper and lower limits of a part |
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Definition
| c) The limits of size are the maximum and minimum permissible dimensions of a part |
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Term
A shaft size is 2.000" ± 0.002, and the hole size is 1.996" ± 0.001. The allowance is:
a) 0.004"
b) 0.002"
c) 0.008"
d) negative |
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Definition
| d) A shaft size is 2.000" ± 0.002, and the hole size is 1.996" ± 0.001. The allowance is negative. |
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