Router bit manufacturers have
color coated carbide-tipped bits
for decades. Aside from easy brand
recognition, the non-stick coatings
resist resin that contributes to heat
build-up affecting bit performance.
But these coatings are too thick
to be applied to carbide cutters.
Amana has devised a way to pro-
tect the complete bit. The company’s
Spektra-line features a proprietary
nanocomposite (nACo) coating
that completely covers the carbide
in a micro-thin ceramic skin. In
addition to setting up a slick
surface that prevents resin build-
up, the nACo coating increases
the hardness of the carbide.
According to manufacturer tests,
Spektra bits last up to 2½× longer
than comparable uncoated bits.
The Spektra line is aimed at
the CNC market, but I’ve found
them equally suited for hand-held
and table-mounted routers. And
they hold up against most bit-
eating materials, like MDF and
wet, pressure-treated lumber. The
bits cost more than other premium
bits, but they’re worth it if you
work with a lot of abrasive mate-
rials. The multi-colored hue is aresult of the application process
and will dissipate with use, though
the coating remains effective. ■
—Tester, Joe Hurst-WajszczukHot New Tools
Color-coated bits make the cut
Amana Spektra Router Bits