plane is a low angle, bevel up fine surgical instrument with
a tight mouth.
It differs from a rebate or fillister plane in
that they are open mouth, high angle, bevel down hoggers. These
planes remove stock fast but not
as accurate as shoulder planes.
To remove stock to the line, a shoulder plane is
better tool. It provides accurate cut and clean and square
For this purpose the iron on a shoulder plane is
slightly wider than the mouth so it can get right into the
corners of shoulders, rebates and dados.
Commonly shoulder planes are 3/4", 1", and
1-1/4" though some exceptions are wider or narrower.
Which to use is directly related to the type of
work you do. For finer work, like I generally do in toolmaking,
smaller ones are best my favorite being 3/4". The wider it is
the easier to level but for thin dados etc., it won't fit. So
it's a trade off if your work is wide ranging. In this case the
1" or 1 1/4" may be more useful.
This Gabriel moving fillister was used to hog out a shoulder
I could have used a rebate but since I recently restored this
I thought I might take him for a test drive.
This is a quality plane made by a maker over 200 years old.
Yet it can still hog out clean shavings after two centuries!