T18M HSS Rectangle Toolbits

This is the default grade used at Metalbor, and is the most commonly used HSS material worldwide.
It is suitable for all standard machining, including interrupted cuts, in most ferrous materials including free-cutting
stainless, cast alloys and cast iron, and many non-ferrous materials.

Rectangular section toolbits are manufactured similarly to squares. They routinely have square (90°)
end condition since it is not predicted in which orientation the tool will be used. The number of sections which
can be offered at standard prices is now much less than formerly. This is contrary to Metalbor intention, but
is due to the concentration of production of raw High Speed Steels in only a few hands. Whereas it was once
easy to commission special sections in great variety from many reliable Sheffield makers, the steel suppliers
now require such large amounts per ‘heat’ and such long deliveries, that the range is increasingly restricted.
Therefore, particularly for rectangular sections, supply beyond existing stocks is not always possible, and
prices may not be maintained for new supply.