How do you write a countersink dimension?

How do you write a countersink dimension?

Write the dimensions of the countersink, giving first the diameter of the drill hole, then the angle of the countersink, followed by the diameter symbol and the diameter of the larger hole. This dimension can be given either with a diameter symbol first, or with the word DRILL after the first diameter.

What is the countersink diameter?

Countersink diameter is the final diameter of the hole after drilling, measured in the start surface. The countersink diameter cannot be larger than the tool diameter.

How do you call a countersunk hole?

Place all of the dimensions for one feature in one view if possible. For instance, place the hole diameter and position dimension on the same view. Combine callouts. For countersunk holes, combine the through hole and countersinking callouts into one callout.

How do you dimension countersunk and counterbore hole?

Dimensioning Counterbore Hole Select Dimension Tool in the Annotate Tab > Double Click on the outer circle o the counterbore (NOTE Leader Arrows should always point to the larger hole) This will place the diameter of the large hole Page 9 4.

What is the symbol for countersink?

A countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole.

What size countersink bit for #10 screw?

Wood Screw Pilot Hole Sizes

Screw Size Hard Wood Countersink Size
Tapered Bit
#8 11/64″ 3/8″
#9 3/16″ 3/8″
#10 13/64″ 7/16″

What countersink means?

countersink. / (ˈkaʊntəˌsɪŋk) / verb -sinks, -sinking, -sank or -sunk (tr) to enlarge the upper part of (a hole) in timber, metal, etc, so that the head of a bolt or screw can be sunk below the surface. to drive (a screw) or sink (a bolt) into such an enlarged hole.

How do you use a countersink symbol?

A countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole….Types.

Normal CS angle Type of thread
82° American inch screws (UNC, UNF, UNS)
90° ISO metric

What is counterbore countersink?

The difference between them is the angle at which the larger hole is drilled. A countersink’s larger hole is tapered at an angle; whereas a counterbore is drilled straight into the material and leaves a flat bottom between the counterbore and the narrower inner shaft.

What size is a #8 countersink?

DEWALT DW2568 #8 Countersink with 11/64-Inch Drill Bit

Material Alloy Steel
Item Dimensions LxWxH 6.8 x 2.6 x 0.8 inches

What countersink used for?

Countersinking is done to insure that flat head screws sit flush to the work piece. A countersink produces a conical hole matching the angle of the screw so that when the screw is fully engaged the head will sit flush or slightly below the surface.