A plane iron (p. 140) is often made to answer the same purpose.
A small tool, either for drilling, or for cutting, as a plane iron.
The lever is for straightening the plane iron, and the screw s is for adjusting the depth of the cut.
The plane iron should be so set that its cutting edge can only just be seen projecting evenly through the stock.
In the block plane there is no cap iron, the cutter or plane iron being placed with the bevelled side up.
Bramah, in 1811, employed a revolving cutter to plane iron, adapting to metal the familiar mechanism for planing wood.
By sharpening the plane iron to a keen edge, then placing it in the plane with the cap reversed and set about 1/32 in.
Loosen the plane-iron cap and screw it down at right angles to the plane iron, also reverse the tool rest as shown in the sketch.