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