Screw Thread Measuring and Gauging
What is the pitch on an M8 x 1.25 thread?
1.25mm
What is the larger end on a cylindrical plug gauge called?
NO-GO gauge
What type of test should be done on a grinding wheel before mounting it?
A ring test
What is a radius gauge used to check?
The radius of a workpiece
What is the pitch on a 3/4-10 UNC thread?
0.100"
What is the pitch on a 1/2-13 UNC thread?
0.0769"
What does the annular ring in the knurled surface of a ring gauge indicate?
It is a NO-GO ring gauge
General purpose grinding wheels use what type of abrasive?
Aluminum oxide
How can you tell which end is the GO gauge on a thread plug gauge?
The GO end is longer than the NO-GO end
What is the tap drill size for an M10 x 1.5 thread?
8.5mm
What is the tap drill size for a 1/2-13 UNC thread as a decimal?
0.423"
Which way do you rotate a taper plug gauge when checking a tapered hole?
Counter-clockwise
When a grinding wheel no longer cuts because the abrasive particles have become dull, the wheel is said to be what?
Glazed
Which method of measuring pitch diameter is least affected by errors in the thread angle?
The 3-wire method.
A hand held tool for polishing workpieces and removing burrs is called what?
A die grinder
What is the pitch diameter on a 1/2-13 UNC thread?
0.450"
What type of gauge is used to check the diameter and angle of an outside taper?
A taper ring gauge
What is the operation used to restore the shape of the face of a grinding wheel called?
Truing
What is the best wheel to clean scale and dirt off a workpiece?
A wire wheel
How long should a newly installed wheel run for before you use it to grind and why?
One minute, if it is going to break it will usually do so in the first minute.
What is the best wire size for measuring a 1/2-13 UNC thread?
0.044"
Which type of gauge has a C-shaped frame?
A snap gauge
What colour is a silicon carbide grinding wheel?
black or green
What type of grinding wheel is usually installed on a side wheel grinder for sharpening carbide cutting tools?
Silicon carbide
Using the formula M=E-0.86603P+3W what is the measurement over the best wire size for a 1/2-13 UNC thread?
E=Major Diameter-(0.6495xPitch)
W=0.57735xPitch
0.5154"