unit 1,5,6,,7,8 Flashcards
two types of arbor presses
hydralic and mechanical
bushings should be lubricated with high pressure lube before pressed into a bore no oil
true
the bore should always have a ?
chamfer
when working with bolster plate minimum pressure otherwise damage will be done
true
keyseat:
it is helpful to chamfer the leading end so it aligns
the mandrel is tapered about?
0.006 inch per ft
broaching atleast 2 or 3 have to be in contact
true
two important things in broaching
alignment and lubrication
never use a broach on material
harder then rockwell c35
most common tapers
morse taper and taper pin reamers
morse taper is
5/8 inch
dies are made in
1 1/2 inch
button dies are used in diestock for hand threading or in a machine holder for machine threading
true
collets are held securly in die stocks by a
knurled screw that seats in a dimple cap
hand threading needs
cutting oil or other threading fluids are important obtaining quality threads and long life
go gauge should on the thread
no go will not go more then 1 1/2 turns
a lathe can be used as a fixture
for cutting threads with a die
it is good practice to chamfer
the end of the workpeice before cutting a die
when cutting threads with a hand die
reverse rotation after each full turn to break chips
die is used to cut
external threads
dies are made from
high speed steel
button dies are made in diameter
of 1 1/2 inch and pipe of 1.2 inch