Conic chamfer

A conic chamfer turns one end of a part into a cone about its axis. Everything outside the cone is taken off.

Flank angle 20 °

Flank angle 35 °

Flank angle 55 °

Conic chamfer. Drawn by the editor's own geometry code; right: the carved part in 3D.

When to use it

Use it for a turned foot, a post end that should not splinter, or the round end of a part that fits into a bored hole. A large diameter only takes the corners off; a small one gives a pointed taper.

Fields

Field	Unit	Range or options	Default	What it changes
End		start, end	start	The end of the part the cone is turned at.
Diameter at the end	mm	from 1	96	The cone's diameter in the end face.
Flank angle	°	1 to 89	30	The flank against the part's axis: small is a long, slender taper, large a short one.

Default: what Add fills in on a 3000 mm part of 120 x 120 mm.

Add a conic chamfer

1. Select the part in the Parts list.
2. Under Extra processings, click Add.
3. Type conic in the search field and pick Conic chamfer.
4. Pick the End.
5. Set Diameter at the end and Flank angle. The cone widens into the part until it clears the corners.
6. Check that the part shows a green check. If not, open the Issues tab.

Note

The cone is turned from a square end. On an end cut at an angle it is not cut, and the part says so. A cone that would run past the other end of the part is not cut either.

Machine export

BTLx, BVN and BTL have no processing for a cone at a part end: they list it on the part for finishing by hand. BVX writes a cone at the start of the part in the shop test pack only, as a ConicChamfer read from the one public file that holds one, until the shop confirms how CAMBIUM measures it.

Format	Status	Details
BTLx	Not written	BTLx has no processing that turns a cone at a part end. Listed on the part for finishing by hand.
BVN (Hundegger)	Not written	BVN has no operation that turns a cone at a part end. Listed on the part for finishing by hand.
BVX2 (Hundegger)	Partly supported	Experimental, included with a warning unless you leave them out: a cone at the start of the part, as a ConicChamfer read from one public file. A cone at the far end is not written yet.
BTL 10.6	Not written	No BTL 10.6 record turns a cone at a part end: omitted with a loss.

BTL status describes what the specification can represent. CAMBIUM imported our earlier BTL test files; confirmation applies to the tested forms and build. See BTL coverage for representation and receiver caveats.

Related pages

• Chamfer: Chamfer the lengthwise edges of a part. Choose the edges, the size and the run-out, and see how each machine format exports it.
• End-grain bore: A round hole straight into the end of a part, along the grain, for a post base, a dowel or a hidden connector. Fields and machine export.
• Dovetail tail: A dovetail tail on the end of a joist that drops into a dovetail socket, square or at an angle. Fields, card, handles, Fitting and machine export.
• Profiled end: Shape the end of a part to a curve in one face, as a rafter tail: a hollow, a rounding or a cambered line. Fields, defaults and machine export.
• Step joint end: Shape the end of a strut as a step joint: step, heel or double. How it owns the part end, its fields and machine export.
• Tenon: Add a tenon to the end of a part to fit a mortise, square or at any angle for a brace or a rafter. Fields, handles, defaults and machine export.