How deep is a counterbore?

How deep is a counterbore?

M14 22,50mm 14mm
M16 25,50mm 16mm
M20 31,50mm 20mm

How do you dimension a counterbore hole?

Counterbored holes are specified by giving the diameter of the drill, the diameter of the counterbore, and the depth of the counterbore. If the thickness of the material below the counterbore is significant, this thickness rather than the counterbore depth is given.

How much larger should a clearance hole be drilled for a socket head cap screw?

For example, an ANSI Inch 2″ socket cap head bolt with a normal fit counterbored hole will require a pilot hole diameter of 2 1/8″, a counterbore diameter of 3 1/8″, and a counterbore depth of 2 1/16″.

What is counterbore hole?

A counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature.

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 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 is the difference between a counterbore and a 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 #40 drill bit?

Drill Bit Size Chart

Size Decimal Equivalent Size
79 0.0145 28
.38 mm 0.015 9/64″
1/64″ 0.0156 3.60 mm
.40 mm 0.0157 27