How deep should my Spot-face be?
I read that as a rule of thumb you should have a depth of 1/16" for your spot-face. But it made no mention of any dia. Is there a formula that would give this information? or is it just "what looks good"? Thanks for any help you guys can give me.
What is a spotface?
A spotface or spot face is a machined feature in which a certain region of the workpiece (a spot) is faced, providing a smooth, flat, accurately located surface.
What size hole is used for a spotface?
There is no specification on what the hole is used for. Or what the spot-face is used for. Just to find the proper depth and dia. to go with the hole dia. of 5/16" +/- .005". You mentioned that the spotface is on a flat surface.
What is the nominal diameter of the spot-faced surface?
For example, in Boeing Design Manual BDM-1327 section 3.5, the nominal diameter of the spot-faced surface is the same as the nominal size of the cutter, and is equal to the flat seat diameter plus twice the fillet radius. This is in contrast to the ASME Y14.5-2009 definition of a spotface, which is equal to the flat seat diameter.
What is a spot face hole?
A spotface is a very shallow flat-bottomed cylindrical hole that is larger than and coaxial to another cylindrical hole. Its purpose is to provide a flat mounting surface for mating parts, such as washers or pan head screws.
What is a spot face in engineering?
A spotface or spot face is a machined feature in which a certain region of the workpiece (a spot) is faced, providing a smooth, flat, accurately located surface.
Why do we get spot on face?
Our hormone levels are responsible for spots or acne. Spots are basically the skin's response to hormones which can over-stimulate a natural oil called sebum and leave you with oily skin. This excess oil oozes out from the skin and blocks up your pores.
What is the difference between spot facing and Counterboring?
The difference between counterboring and spotfacing is that a counterbored surface usually has a shoulder at the bottom of the enlarged hole, while a spotfaced surface is flat and always at right angles with the axis of the hole.
What is a spot face diameter?
The spotface is used to make flat surfaces perpendicular to the bolt mounting direction. The Counterbore diameter specifies the outer diameter of the feature. The Spotface diameter specifies the flat smooth surface that contacts the washer, nut, or bolt-head.
Which tool is used for spot facing?
Seco spot facing mills are cutters for milling spot faces of blind and countersunk holes.
Why do I wake up with a new pimple everyday?
It's likely due to a combination of hormonal changes, stress and what we're eating. Dr. Whitney Bowe, a New York dermatologist, calls it an "epidemic." According to the American Academy of Dermatology, acne has the dubious distinction of being the most common skin condition in this country.
Should I pop pimple with green pus?
It may be tempting, but popping pus-filled pimples can worsen acne and damage the skin. Releasing the pus allows the bacteria to disperse, which can spread infection. Popping pimples may also increase the risk of scarring.
Do face spots go away?
Most people have acne on and off for several years before their symptoms start to improve as they get older. Acne often disappears when a person is in their mid-20s. In some cases, acne can continue into adult life. About 3% of adults have acne over the age of 35.
Is Counterboring a finishing operation?
Counterboring/countersinking with counterbore/countersink and turning tool is a finishing operation on the internal surface of internally premachined rotationally symmetrical parts. Counterboring/countersinking on the lathe with special counter-bores/countersinks is of minor importance.
What is flange spot facing?
Flange facing is the process of resurfacing flanges by machining new mating surfaces to ensure a perfect seal when assembled.
What is the purpose of Counterboring?
A counterbore is used to enlarge the opening of a hole producing a flat bottom so a socket-head screw will fit flush with the surface of the part. Lock washers may be used to ensure a secure assembly. Typically counterbores are used for a single purpose. Countersinks have a greater range of applications and angles.
What is face in drilling?
a method used in conventional mining to drill a hole in the coalbed for inserting explosive charges. The holes are drilled into the rock and packed with explosives.
What is a spot drill?
: to drill a shallow hole or one just deep enough to locate a spot (as for use as a guide in further drilling)
What is the symbol for counterbore?
⌴A counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature.
How is a counterbore made?
Counterboring is the process of using counterbores on a milling machine to create a hole over the screw clearance. This newly formed hole is designed to let the screw rest in its place and not stick out. Creating counterbores is achieved by using the milling machine, which uses drill bits that have a tip.
What is a spotface?
A spotface is a machined section of a part that allows a fastener to sit flat. This is usually a bolt head or washer but can be other fasteners. A spotface is generally very shallow and removes just enough material to create the clean, even, flat surface. Spotfaces are most often used when machining castings or forgings. Spotfacing is done using a manual or CNC milling machines.
What is the symbol for a spotface?
Spotface symbol. Spotface (counterbore) symbol. The symbol to use to callout a spotface is the counterbore symbol. Older drawings and blueprints may reference a spotface as SF or SFACE instead of using the symbol.
What is the difference between a counterbore and a spotface?
A counterbore usually references a feature that is deeper than a spotface. While a spotface creates a flat mounting surface , a counterbore acts to recess the fastener.
How big is a spotface washer?
Pick an appropriate washer and make the spotface .125in. over the washer OD.
Is there a standard for spotface diameter?
There is no standard for spotface diameter for a hole size. It depends on the intent of what goes in the hole.
Will Eng tips check this out?
The Eng-Tips staff will check this out and take appropriate action.
