STEEL + TECHNOLOGY 04/2019 EXTRACT

72 | METEC 2019 - AFTERTHOUGHT
Accuband strip width gage for cold rolling steel mills and processing lines
The KELK brand of Vishay Precision
Group, Inc. introduced the ACCUBAND
strip width gage model C775-FF for cold
rolling mill and processing line applications.
The gage provides steel mill operators
with continuous, stereoscopic,
non-contact material width measurements
in cold rolling mills and processing
lines.
The width gage includes four CCD cameras,
arranged in fixed pairs, to scan steel
strips at a rate of 1,000 scans per second
in order to accurately locate the position of
the edge, regardless of pass line variations.
The edge data is then combined
with the camera separation distance,
obtained during calibration, resulting in
accurate strip width and centerline deviation.
The compact design of the ACCU-
BAND C775-FF allows the width gage to
be installed in tight spaces while still providing
one of the most accurate measurements
in the industry (±0.4 mm at 2
sigma). In addition, integrated LED front
light illumination provides long life, reliable
performance, and minimal maintenance.
Accuband C775-FF cold strip width gage (Picture: KELK / Vishay Precision Group)
The new ACCUBAND C775-FF joins
KELK’s current model ACCUBAND
C765-F cold width gage and ACCUS-
PEED Laser Velocimeters, to provide
additional solutions for cold rolling mills
and process lines. Movable cameras on
model C765-F automatically position
themselves over the edges of the strip,
based on the nominal width input, to provide
accurate width measurements,
whereas cameras on the new model
C775-FF are pre-positioned, making the
system more compact, to fit into tight
spaces, and easy to maintain, by eliminating
moving mechanical parts.
In addition to cold strip mills and processing
lines (including galvanizing and
pickling lines), other specific applications
for the ACCUBAND C775-FF include tension
levelers, side trimmers (entry and
exit), tandem mill exits, temper mills, and
slitters/rewinders.
• KELK – a brand of Vishay Precision
Group, Toronto, Ontario, Canada
New work roll bearings significantly increase service life
NSK has developed a four-row sealed
tapered roller bearing with water resistant
grease.
The tough environments found in ot rolling
mills require components that can withstand
the challenging conditions as well as
contribute to keeping cost and energy consumption
down. New work roll bearings
for rolling mills from NSK offer greater reliability
and longer service life.
The NSK work roll bearings are packed
with a newly developed grease that
extends service life even under severe
conditions, including water inclusion. The
new grease composition offers a thicker
oil film and protective layer between the
raceway and rollers. Grease additives also
inhibit corrosion which boosts the service
life in conditions where water has potential
to enter the bearing.
The newly designed sealed bearing
offers two benefits. With an optimized
internal design, an increase in load rating
Four-row sealed tapered roller bearing for hot strip mills
(Picture: NSK Americas)
is achieved. Additionally,
the improved
seal design inhibits
water from entering
the bearing which
can reduce contamination
of the grease
and improve bearing
performance. With
these two significant
improvements, real
world test validated
dramatic gains in
bearing service life.
For example, bearings
in a specific mill
are now achieving 16
months service life
compared to conventional bearings typically
lasting less than 8 months.
Increased service life equates to higher
operational reliability, fewer replacements
and reduced downtime for repair. Longer
service life also reduces material and energy
consumption (including CO 2 emissions)
relative to the replacement cycles of conventional
models.
• NSK, Ann Arbor, Michigan/USA
STEEL + TECHNOLOGY 1 (2019) No. 4