Q1: What are the advantages of using the 6000 series of alloys in
A: The 6000 series, which incorporates magnesium and silicon,
provide good extrudability,
strength, corrosion resistance, formability and machinability --
which explains why it’s also
JJT’s alloy of choice for all our aluminum extrusions.
Q2: If I wish to send an electronic drawing to you, what types of
files can you accept?
A: We accept many file formats such as DXF, DWG and IGES.
Q3: Why do extrusion companies always ask me to sign off on a
drawing before they can
order tooling if I’ve already provided a drawing?
A: Oftentimes, we find a few key dimensions that are missing from
the original drawing
that need to be clearly identified. Other times, we have taken
exception to a tolerance,
dimension, alloy, note, surface condition, etc. It’s just our way
of documenting exactly
what we have agreed upon.
Q4: What is the difference between anodized and mill finished?
A: Mill is the raw state of aluminum as extruded - no surface
treatment. Anodized (also
known as Satin Clear or Clear Anodized) is an electrolytic process.
This process increases
corrosion resistance and weather resistance.
Q5: What About Anodizer Rack Marks?
A: Electrical contact must be made to each part to be anodized. The
current required, the greater the electrical contact. The size of
the contact therefore
depends on the anodizing process and the size of the part being