Ulmia siklinteroitin

ULMIA burnishing block
An invention originating from the house of Georg Ott, this is a highly practical and easy-to-use tool to prepare easy cutting scrapers for processing surfaces.
Producing an evenly inclined cutting burr using a conventional burnisher takes a good deal of practice.
Because this burnishing block allows a firm, perfectly even burr to be created on any square scraper in just minutes, this burnishing block has become a highly popular tool for craftsmen and joiners everywhere. 

Preparing the scraper edge
A new scraper is initially nothing more than a piece of sheet steel requiring special preparation before it can be used as
a tool to take very fine shavings off wood surfaces. This is done as follows:
Clamp the scraper in the vice on the carpenters bench or in another suitable clamping device and using a fine flat file
move over the edges with straight (or very slightly rounded) strokes but precisely at right angles to the surface (an
inclined file stroke is recommended). Then hold the scraper between two backing woods to avoid tilting and grind down
the raised edges by moving at a slight incline over a honing stone. Now move the edges and surfaces alternately over
an oilstone until the edges are perfectly smooth and free of grooves. It is essential to produce a continuous, perfectly
sharp edge corner.
Making the burr
The prepared scraper must be well oiled or greased over its edges
and surfaces and clamped in position again. At the same time, grease
the steel and guide angles of the burnishing block. Then, exerting only
light pressure, move the burnishing block backwards and forwards
over the edge of the scraper until, with gradually mounting pressure
and after regreasing the edge of the scraper, the required degree of
burr has been achieved.
The incline of the steel in the burnishing block corresponds to the
most favourable cutting angle of the burr and the most comfortable
position of the scraper while working. By pressing the steel at this
angle of inclination, it is also possible to prevent the burnishing block
from slipping, as it presses the scraper edge against the guide angle
of the burnishing block.
Once the burr is formed on one edge, turn the scraper around and
carry out the same procedure on the other edge. To protect the
already produced burr, use a cloth when reclamping the scraper.
In scrapers with only 1 burr (parquet flooring scrapers, spokeshaves,
cabinet scrapers) the burr is prepared in the same way. Take care to
incline the burnishing block initially slightly towards you and only to
move to a vertical position as the pressure progressively increases.
After first oiling or greasing the burnishing block well, the burr is then
made by rubbing from bottom and top with the tip of the steel. If the
cutting edge of the scraper gradually diminishes, it is sufficient to raise
the burr again by rubbing. This can be repeated until the burr is used
up.
The cutting capability of a scraper with correctly pressed burr is evident in the fineness of the wood shavings. To maintain the cutting
capability of scrapers, these should not be brought into contact with
other tools, but kept separately in a protected location.