Test 2 Chapter 9 & 10
Key Seat
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Keyway
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Standard washer
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Threaded fasteners
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Explain what 1/2-13 UNC-2 means.
1/2- 13- UNC- 2-
Blind rivet
Developed for applications where it is not possible to set regular rivets.
An ___ is used to cut external threads..
Die
Permeant assemblies are made with ____.
Drive screws
Dowel Pins
Fitted in ream holes to align mating parts.
Cotter pin
Fitted into a hole drilled crosswise in a shift.
Drive Screws
Hammered into drilled or punched holes.
_____ Washers are often used to prevent bolts or nuts from loosening under vibration.
Lock Washer
Explain what M5 X .8-6H/6g means.
M5- .8- 6H/6g-
____ threaded fasteners are used for general assembly.
Machine screws
Retaining ring
Must be seated into a groove
It has been established that the hole to be threaded must be smaller than the threat. for example a /16 diameter hole must be drilled for a 3/8-1 UBNC thread. How much larger must a shaft be machined to receive a 3/8-16 UNC thread?
N/A
Jam nut
Often used to lock regular nut in place
Key
Prevents pulley or gear from rotating on shaft
List four fastening devices used to join materials.
Screws, nuts, bolts and pins.
____ threaded fasteners prevents pulley from slipping on shafts.
Setscrews
The ____ tap wrench is used with small taps because____.
T-Handle tap wrench because it allows a more sensitive feel when tapping.
The ___ is used to cut internal threads.
Tap
The drill used to make a hole before tapping is called an_____
Tap Drill
List the taps in the sequence they would be used to cut threads to the bottom of a blind hole.
Taper-plug-bottoming tap.
____ threaded fasteners forms threads as it is driven.
Thread forming screws
An external thread must be cut on a diameter equal to the thread size. Explain why this statement is true or false.
True
Machine Screw
Used in general assembly work
The shape of the ___ permits it to be loosened and tightened without a wrench.
Wing Nut
The whole to be tapped must be the same size as the tap. Explain why this statement is true or false.
false because it needs to be smaller
Thread forming Screw
forms threads as they are driven.
The UNF thread series differs from the UNC series in that ______.
they are not interchangeable
____ threaded fasteners cuts threads as it is driven.
thread cutting screws
Acorn nut
used when appearance is of primary importance
Machine bolt
used when assemblies don't not require close tolerance fasteners