Lie-Nielsen High Angle Frogs - $75.00 - $85.00
Until recently, all Stanley-type bench plane irons were bedded at 45 degrees, or Common Pitch. But the famous English Smoothers like Norris are usually 50 degrees (York Pitch) or 55 degrees (Middle Pitch). The higher pitches make smoothing difficult wood easier. Lie-Nielsen's unique High Angle Frogs quickly convert their No. 4 and No. 4½ Smoother to York or Middle Pitch.
These frogs will also their our other planes with 2 in. or 2-3/8 in. blades. They will not fit other makes of planes. May be ordered extra or installed in the tool.
Lie-Nielsen's notes on Using the High Angle Frog
Conventional bench planes have the blade set in the tool, or pitched, at an angle of 45°. Our unique High Angle Frog pitches the blade 5° higher. With a very fine mouth setting, shavings may clog the throat. This is especially true if you prefer to set your chip breaker(back iron) very close to the cutting edge. Because our blades are so thick, you will probably find that you can move the chip breaker back, creating more clearance.
If you still get clogging, then file the leading edge of the mouth at a slight angle to allow chip clearance. It is best if you do not file all the way to the sole, but leave a small flat. To make it easier to see what you are filing, blacken the area with a magic marker.