shallow scratch. The straight scratch
from a widebelt head can be hard to see
when in-line with the grain, but when
perpendicular can be unsightly.
An orbital head can be used to
4 | Abrasives
remove linear cross-grain scratches
using a wide platen and special motion
(like a handheld “jitterbug”). Lastly, a
brush head can be used to break sharp
edges and even out the part surface for
consistency in stain colors.
The common denominator in any sanding machine is the abrasive. The actual
abrasive mineral is contacting the part
and doing all the work that you see; the
machine is just backing it up.
Use the right abrasive for your ap-plication/machine to optimize performance and minimize your consumable
costs. Many times, premium abrasive
products are more expensive, but have
a lower cost per part, and their performance could increase production
speeds or provide a better finish.
5 | New vs. used
For many shops on a tight budget, the
cost savings from buying a used sander
can be very tempting. If you are thinking of buying a used machine, I urge
you to do your homework.
Do you know how to properly align
the machine? How is it configured?
(Metalworking machines look identical,
but have many differences: soft rubber
drums, slow head speeds, abrasives run
with-the-feed instead of against, etc.)
What is the condition of the machine
and components? A new contact drum
can cost $4,000 to $15,000 or more! Are
you confident in your ability to identify
these issues? A good starting point is
to contact the manufacturer and ask
them about the history of the specific
machine you are looking to buy.
Source: Greg Nykiel is a product
development specialist at Timesavers LLC, with
over a decade of experience. For information
call 800-537-3611 or visit TimesaversInc.com.
SANDING & FINISHING
4850 Crittenden Drive, Louisville, KY 40209
Tel: 502-361-1003 • Fax: 502-361-2003
Toll Free: 877-631-1003
Innovation and tradition made in Italy
The DUALTECH 416 series spray machine is the most versatile
mouldings and components of different shapes and sizes.