Where it is necessary, to scrape
roughly the wood's surface, before sanding with sandpaper, or to
shape and smooth rounded parts, concave or convex, smooth
chipped and frayed corners, you can use the rasps, consisting of a steel
bar, ending with a tang, on which engage the handle, in wood or plastic.
The abrasive surface is realized
eroding the metal with the burin, with which is created a series of parallel
cuts, that produce different aligned teeth, more or less protruding.
The profile of the section can be rectangular, (fig. 1a), half-round, that is semicircular in shape (fig. 1b) or round, also called rat-tail (Fig. 1c).
They come in various sizes and grits.
For a better finish, you can use the files (fig. 2).
The abrasive part is realized by
a series of cross-cuts, which produce a surface similar to the skin of a
fish, with a variable number of from six to one hundred and fifty per square centimeter.
From the amount of grits, we
determine the fineness of files, which are therefore classified as:
rough o coarse, middle, bastard, second cut, smooth
There are also files called "Dead
smooth", of up to six hundred grits per square centimeter.
As with rasps, there are of various sizes and with different
shapes: rectangular, half-round, round, triangular (three square), with a
wedge section (knife), diamond or double knife, oval or almond.
For particular works, there are shaped
rasps and files, called riffler, suitable for small surfaces, which are held in the middle, in the smooth part. (Fig. 3 and 4).
To remove the sawdust and wood
dust from the gaps, the teeth should be used a brush with metal bristles
|
fig. 1
fig. 3
The
portal Restauromobile
Are you a restorer, a carpenter, a craftsman of
wood or an antique dealer or a private person and would like to submit
your work or sell furniture or antiques, or sell items, equipment and
materials for carpenters and restorers?
Register on the site and enter your free ads.
The portal has also, in the antiques & surroundings section:
|
|
fig. 2
fig. 4
|