How deep is a counterbore?
Maximum depth of counterbore must be less than or equal to 0.6 times the sheet metal thickness.
How do you dimension a 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.
How do you measure counterbore?
QUICKLY MEASURE COUNTERSINK DIAMETERS Simply press the spring loaded, exact angle Gaging Plunger into the countersink and read the dial directly in . 002″ or 05mm diameter increments on the dial face or optional digital indicator. The COUNTERSINK GAGE is a direct reading gage.
What is the diameter of the counterbore?
COUNTERBORE HOLE DIMENSIONS CHART (INCH)
| Nom. Size or Basic Screw Dia. | Normal Drill Size, A | |
|---|---|---|
| 0 | 0.0600 | 0.067 |
| 1 | 0.0730 | 0.081 |
| 2 | 0.0860 | 0.094 |
| 3 | 0.0990 | 0.106 |
When drilling for a 1/2 socket head cap screw what size hole would you drill for a counterbore?
ANSI Hardware Design Guides ISO Metric Hardware Design Guides
| Nom. Size Screw | Nom. Size Screw Decimal | Nominal Drill Size A |
|---|---|---|
| 3/8 | 0.3750 | 25/64 |
| 7/16 | 0.4375 | 29/64 |
| 1/2 | 0.5000 | 33/64 |
| 5/8 | 0.6250 | 41/64 |
What diameter is counterbore?
COUNTERBORE HOLE DIMENSIONS CHART (INCH)
| Nom. Size or Basic Screw Dia. | C | |
|---|---|---|
| 6 | 0.1380 | 0.158 |
| 8 | 0.1640 | 0.188 |
| 10 | 0.1900 | 0.218 |
| 1/4 | 0.2500 | 0.278 |
How do you drill a counterbore?
To counterbore a hole, it’s easiest to drill the larger-diameter hole first, then drill the deeper hole for the fastener’s shaft. You should use a spade bit-or, better-a Forstner bit, which will create a flat-bottomed hole.