OldTools Archive

Recent Bios FAQ

25361 Ernie Fisch <ernfisch@p...> 1997‑09‑01 Re: Skew Angle for 46 Cutters
** Reply to note from tmcclus@j... Sun, 31 Aug 1997 22:45:29 EDT

GGs,

A skewed blade has three angles of interest. The skew angle, the beddinga
angle and the bevel angle.

My definitions of these angles are as follows:

Skew angle: The angle between 90 deg to the side of the plane and the back of
the mouth. Skew is the angle the blade is moved from normal, which is 90 deg.
This angle is measured on the sole of the plane.

Bedding angle: This is the angle between the sole of the plane and the iron.
Typically 45 deg.

Bevel angle: The angle of the bevel measured at 90 deg to the edge.

The skew angle is NOT the same as the skew on the edge of the blade due to the
effect of the bedding angle.

If the edge of the blade is parallel to the back of the mouth you can use the
blade as a reference and just measure the angle from the blade (record it
somewhere safe). Otherwise it can be developed geometrically from the skew
and bedding angles. Or just believe us.

In practice the blade can be fiddled with slightly to make small changes in
the skew angle when it is mounted in the plane.

Ernie
I'm not a collector, really. I'm just a user without enough time.
(used by permission)



Recent Bios FAQ