What is a chamfered hole?

Chamfering is the sinking of the heads of fixed screws into the board when no protrusion on the board surface is allowed. We call this holes chamfered mechanical holes or countersunk holes. This is not so easy on epoxy material but we can do it for the standard screws M3.

What is a chamfer edge hole?

A chamfer edge is made up of a flat edge meeting a 45-degree angle. A chamfer edge improves visual properties, but it is also a practical option for reasons other than appearance. This particular type of edge makes it less susceptible to damage and is sturdier than a filet and bevel edge.

What is the purpose of chamfer in making a bolt thread?

The purpose of chamfering or countersinking an internal threaded hole is typically to avoid creating a raised burr that can prevent a mating part from properly seating with another flat surface.

What should the Od be on a threaded hole chamfer?

Threaded-hole chamfers normally have included angles of 120° or 90°, with 90° being most common. The OD and depth of the chamfer sometimes are specified on the blueprint.

What kind of hole is a step and chamfer drill?

Another common type of hole is a stepped, or stepped and chamfered hole. Typical applications are components with countersunk screws or bolts. Solid carbide drills – available with steps and chamfers. Solid carbide drills – choose drill according to hole size and depth.

How big is the chamfer of all tapped holes?

Thanks to all. It looks like we ought to have another boilerplate note something like: ALL TAPPED HOLES SHALL HAVE A CHAMFER OF DIMENSION MAJOR DIA+.010/+.020 X 90°-120°. (And I was so sure I was right… darn!

Which is the correct definition of a chamfer?

In machining a chamfer is a slope cut at any right angle edge, e.g. holes; the ends of rods, bolts, and pins; the corners of the long-edges of plates; any other place where two surfaces meet at a sharp angle. Chamfering eases assembly, e.g. the insertion of bolts into holes, or nuts.