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Portable Sander
Finishes the Job for
Massachusetts
Company
Case Study by Tom Carroll
President, CS Unitec, Inc.

This article is an adaptation of the
article published in the September,
2002 issue of The FABRICATOR®
  AAMS Corporation, a miscellaneous-
metals fabricator in Taunton, Mass.,
recently took on a large project for Olin
College of Engineering, a
new institution of higher
learning near Boston.
The project called for
fabricating about 1,500                                                            Figure 1
feet of 1-1/2 in. stainless                                             grinder had been used
steel pipe for handrails                                                mainly to grind down
and stairway railing at the                                             welds, and AAMS was
college (see Figure 1).                                                 doubtful that it could
   The challenge for AAMS                                              produce the highly
was not so much in the size of the        Figure 2       polished finish necessary to meet
project as in the finish required. A                  the customers' specifications. Also, when
polished look was specified for all               working with 90-degree bends, operators
components of the job, which involved             found it difficult to move this type of grinder
a large number of 90-degree corners.              into the tighter spaces.
  At the same time, AAMS also was                    It soon became obvious that the finish
working on a complex project for a retail-        produced by a conventional grinder would
residential building at Uphams Corner in          not be acceptable. A swirl pattern rather
Boston. The company was constructing              than a polished finish was the result from
400 ft. of railing for handicap entrance          this type of grinding (see Figure 3). This
ramps. The ramp rails were fabricated             was caused by the circular rotation of the
from 1-1/4-in. Schedule 40 aluminum pipe          grinding disk moving the abrasive against
with aluminum molding (see Figure 2).             the grain of the pipe. The company could
After the pipe was welded and ground,             have achieved a uniform grain by hand
the railing also required a polished finish.      polishing with steel wool, but the company
  AAMS wanted to be very careful with             considered that method too time-consuming,
the rail polishing because both customers         and it required a great deal of manual effort.
required it for aesthetic purposes. The
company previously had relied on a 4-in.
                                                                  Continued inside
angle grinder for finishing. The angle
the belt tightened continuously for
                                                   different pipe diameters.
                                                      AAMS continued to use the 4-in. angle
                                                   grinder to bring down the welds on both
                                                   projects, but to achieve the final finish
                                                   it put the pipe sander to the test. The
                                                   operator placed the sander over the
                                                   pipe, which fit into a contour on the
                                                   machine, and then walked it along the
                                                   length of the pipe while an abrasive belt
                                                   rotated around it. Because the sanding
                                                   belt moved around the circumference
                                                   of the pipe, the sanding was done in
                                                   one direction, enabling it to meet the
                   Figure 3                        polishing specifications.
                                                     The operators went through several
  This led to a decision by AAMS to search
                                                   steps with the pipe sander to get the
for an alternative. The company decided it
                                                   polish that was needed. They began
needed a finishing machine specifically
                                                   using it with coarser 36-grit abrasive
designed for tube and pipe.
                                                   belts to remove gouges or imperfections
   While scouring the Internet to find a tool      in the milled pipe. Next they went to a
that would help them achieve the required          medium 80 grit, which smoothed out the
finishes, AAMS considered several pipe             pipe, removed any marks left by the
sanders. It chose the CS Unitec pipe               coarser grit, and produced a matte finish
sander, model LBR 1506 VR. According               in preparation for final polishing. The
to Brendan Pequita,                                                        final polish was
AAMS's layout                                                              made using a fine
specialist, the pipe                                                       120 grit, which
sander was                                                                 gave the pipe
lightweight, making                                                        the specified
it easy to use, and it                                                     decorative look
was also affordable.                                                       (see Figure 5).
  In addition, it met                                                       AAMS estimates
another of the                                                           that finishing the
company's                                                                two jobs with the
requirements by                                                          pipe sander took
being portable                                                           half the time hand
enough to be used                                                        polishing would
both in the shop and                                                     have taken. The
in the field (see                                                        tool proved to be
Figure 4). The                                                           adaptable to every
sanding machine                                                          surface of the rails
was suitable for 3/8-                                                    for both projects.
to 10-in. pipe, and                                                      It was easily
                                            Figure 4
maneuvered around corners, fitting right
into the 90-degree angles. In addition,
Pequita said, "Because the machine did
all the work, there was much less
physical stress for the operators."
   The pipe sander not only helped AAMS
                                                                              Figure 5
to finish these two projects as prescribed
in a reasonable time frame, but it also
gave this fabrication company new
capabilities that can help it expand its
customer base. Pequita predicted that
"Now that we have the pipe sander, we
will be much more likely to take on other
finishing work in the future."



     Model LBR 1506 VR Electric* Portable Pipe Sander
                                             Product Features

                                             • Continuous sanding belt speed
                                               adjustment, from 33 to 100 ft./sec.

                                             • Full-wave electronic control with
                                               overload protection and smooth start

                                             • 11 Amp variable-speed electric
                                               motor provides high torque

                                             • Shut-off carbon brushes

                                             • Continuous belt tightening adjustment

                                             • Ergonomic design and lightweight
                                               construction reduce operator fatigue

                                             • Wide assortment of sanding
                                               belts, including polishing fleece for
                                               stainless steel

                                             * Pneumatic model also available
Also available from CS Unitec…
                                                                     Surface Finisher
                                                                     Model LP 1503 VR (Electric)
                                                                      CS Unitec’s Portable Surface Finisher
                                                                      works on steel, stainless steel,
                                                                      aluminum and all other metals, as well
                                                                      as wood and plastics. It is the perfect
                                                                      industrial machine for polishing,
                                                                      blending, cleaning welds, graining,
                                                                      dulling, brushing, deburring and other
                                                                      surface sanding and polishing
                                                                      applications. This electric Surface
                                                                      Finisher with 4"-wide face produces
                                                                            shadow-free, uniform surfaces
                                                                           with ease. Optional front and rear
                                                                             guide rollers ensure an even
                                                                               finish. This 11 Amp variable-
                                                                                 speed electric model provides
                                                                                high torque output.
                                                                                Loadspeeds: 1200 to 3700 RPM.
ECO-50 Magnetic Drill
CS Unitec offers a full range of compact and
powerful Magnetic Drills designed for fast, accurate
hole cutting, on the job site or in the shop. The
ECO-50 (shown right) is a lightweight (29 lbs.),
two-speed high-performance drill. It is built with a
compact height of only 161/2", so it is easy to drill in
small spaces. The ECO-50 also features a strong
10.5 Amp motor, 2-speed gearbox and an HD
dual-coil magnet with a holding strength of
3740 lbs. It is capable of drilling up to 2"-
diameter holes with Annular Cutters; and, with
a 5/8" chuck (Part No. IBK-19), the ECO-50
can easily convert to a standard drill press. CS
Unitec also includes a standard Easy Quick-Lock
Cutter Holder and a one-year warranty with the purchase
of this drill. To find complete specifications and drilling
capabilities for any CS Unitec Magnetic Drill, visit the
company’s Web site: www.csunitec.com




                                                          CS UNITEC, Inc.
                                                          22 Harbor Avenue, Norwalk, CT 06850
                                                          800-700-5919 • 203-853-9522 • Fax 203-853-9921
                                                          Email info@csunitec.com • www.csunitec.com

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CS Unitec Portable Pipe Sander Case Study

  • 1. Portable Sander Finishes the Job for Massachusetts Company Case Study by Tom Carroll President, CS Unitec, Inc. This article is an adaptation of the article published in the September, 2002 issue of The FABRICATOR® AAMS Corporation, a miscellaneous- metals fabricator in Taunton, Mass., recently took on a large project for Olin College of Engineering, a new institution of higher learning near Boston. The project called for fabricating about 1,500 Figure 1 feet of 1-1/2 in. stainless grinder had been used steel pipe for handrails mainly to grind down and stairway railing at the welds, and AAMS was college (see Figure 1). doubtful that it could The challenge for AAMS produce the highly was not so much in the size of the Figure 2 polished finish necessary to meet project as in the finish required. A the customers' specifications. Also, when polished look was specified for all working with 90-degree bends, operators components of the job, which involved found it difficult to move this type of grinder a large number of 90-degree corners. into the tighter spaces. At the same time, AAMS also was It soon became obvious that the finish working on a complex project for a retail- produced by a conventional grinder would residential building at Uphams Corner in not be acceptable. A swirl pattern rather Boston. The company was constructing than a polished finish was the result from 400 ft. of railing for handicap entrance this type of grinding (see Figure 3). This ramps. The ramp rails were fabricated was caused by the circular rotation of the from 1-1/4-in. Schedule 40 aluminum pipe grinding disk moving the abrasive against with aluminum molding (see Figure 2). the grain of the pipe. The company could After the pipe was welded and ground, have achieved a uniform grain by hand the railing also required a polished finish. polishing with steel wool, but the company AAMS wanted to be very careful with considered that method too time-consuming, the rail polishing because both customers and it required a great deal of manual effort. required it for aesthetic purposes. The company previously had relied on a 4-in. Continued inside angle grinder for finishing. The angle
  • 2. the belt tightened continuously for different pipe diameters. AAMS continued to use the 4-in. angle grinder to bring down the welds on both projects, but to achieve the final finish it put the pipe sander to the test. The operator placed the sander over the pipe, which fit into a contour on the machine, and then walked it along the length of the pipe while an abrasive belt rotated around it. Because the sanding belt moved around the circumference of the pipe, the sanding was done in one direction, enabling it to meet the Figure 3 polishing specifications. The operators went through several This led to a decision by AAMS to search steps with the pipe sander to get the for an alternative. The company decided it polish that was needed. They began needed a finishing machine specifically using it with coarser 36-grit abrasive designed for tube and pipe. belts to remove gouges or imperfections While scouring the Internet to find a tool in the milled pipe. Next they went to a that would help them achieve the required medium 80 grit, which smoothed out the finishes, AAMS considered several pipe pipe, removed any marks left by the sanders. It chose the CS Unitec pipe coarser grit, and produced a matte finish sander, model LBR 1506 VR. According in preparation for final polishing. The to Brendan Pequita, final polish was AAMS's layout made using a fine specialist, the pipe 120 grit, which sander was gave the pipe lightweight, making the specified it easy to use, and it decorative look was also affordable. (see Figure 5). In addition, it met AAMS estimates another of the that finishing the company's two jobs with the requirements by pipe sander took being portable half the time hand enough to be used polishing would both in the shop and have taken. The in the field (see tool proved to be Figure 4). The adaptable to every sanding machine surface of the rails was suitable for 3/8- for both projects. to 10-in. pipe, and It was easily Figure 4
  • 3. maneuvered around corners, fitting right into the 90-degree angles. In addition, Pequita said, "Because the machine did all the work, there was much less physical stress for the operators." The pipe sander not only helped AAMS Figure 5 to finish these two projects as prescribed in a reasonable time frame, but it also gave this fabrication company new capabilities that can help it expand its customer base. Pequita predicted that "Now that we have the pipe sander, we will be much more likely to take on other finishing work in the future." Model LBR 1506 VR Electric* Portable Pipe Sander Product Features • Continuous sanding belt speed adjustment, from 33 to 100 ft./sec. • Full-wave electronic control with overload protection and smooth start • 11 Amp variable-speed electric motor provides high torque • Shut-off carbon brushes • Continuous belt tightening adjustment • Ergonomic design and lightweight construction reduce operator fatigue • Wide assortment of sanding belts, including polishing fleece for stainless steel * Pneumatic model also available
  • 4. Also available from CS Unitec… Surface Finisher Model LP 1503 VR (Electric) CS Unitec’s Portable Surface Finisher works on steel, stainless steel, aluminum and all other metals, as well as wood and plastics. It is the perfect industrial machine for polishing, blending, cleaning welds, graining, dulling, brushing, deburring and other surface sanding and polishing applications. This electric Surface Finisher with 4"-wide face produces shadow-free, uniform surfaces with ease. Optional front and rear guide rollers ensure an even finish. This 11 Amp variable- speed electric model provides high torque output. Loadspeeds: 1200 to 3700 RPM. ECO-50 Magnetic Drill CS Unitec offers a full range of compact and powerful Magnetic Drills designed for fast, accurate hole cutting, on the job site or in the shop. The ECO-50 (shown right) is a lightweight (29 lbs.), two-speed high-performance drill. It is built with a compact height of only 161/2", so it is easy to drill in small spaces. The ECO-50 also features a strong 10.5 Amp motor, 2-speed gearbox and an HD dual-coil magnet with a holding strength of 3740 lbs. It is capable of drilling up to 2"- diameter holes with Annular Cutters; and, with a 5/8" chuck (Part No. IBK-19), the ECO-50 can easily convert to a standard drill press. CS Unitec also includes a standard Easy Quick-Lock Cutter Holder and a one-year warranty with the purchase of this drill. To find complete specifications and drilling capabilities for any CS Unitec Magnetic Drill, visit the company’s Web site: www.csunitec.com CS UNITEC, Inc. 22 Harbor Avenue, Norwalk, CT 06850 800-700-5919 • 203-853-9522 • Fax 203-853-9921 Email info@csunitec.com • www.csunitec.com