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October 2007 - The
Logging and Sawmilling Journal
SAW GUIDE LUBRICANTS
The function of saw guide oil is to form a friction-reducing
oil wedge in the tight clearances between the rotating saws and
Imperial Oil’s saw guide oils are formulated with extreme
pressure (EP) and anti-wear (AW) additives due to their multifunctional
usage: sharp chains, deck chains and debarkers. This
latter equipment can benefit from the EP additive’s reactivity
to steel-on-steel rubbing, in addition to the adhesive properties
provided by the tackifier.
Imperial Oil’s higher viscosity grades can help reduce oil
consumption, and cost, but the lube system must be capable
and ambient temperatures must be sufficiently warm to enable
proper oil flow.
There is a great deal of science that has gone into the
research and development of these lubricants, the company
The Rockwell lubrication system is designed to use a
combination of air, oil and water as lubrication and coolant for
The flow and consumption of these elements are individually
regulated and can be easily adjusted by mill personnel. Water
consumption is held to a minimum by using photocells to
activate water valves, which are set to a “Sawing” and “Non-
Sawing” flow rate.
Common flow rate is set at approximately .5 gallons per
minute for “Sawing” time
only and .1 gallons per
minute during “Non-Sawing”
time. Oil consumption can
be as low as one gallon per
shift. The water filter is a 30-
micron filter, which can be
reused after simple cleaning.
The air, oil and water lines
have individual low-pressure
switches to alert the operator
of any line failures.
(operating under Chevron Global Lubricants) utilizes saw
guide lubricant technology based on the incorporation of nontacky
additives. These additives have been found to improve
performance in several areas: eliminating the plugging of
openings and oil/debris build-up; reducing rust and corrosion; as
well as improving cold temperature properties.
Specific lubricity additives are incorporated to maintain
heat and wear tolerances, and at the same time act to reduce
arbor drag, thereby providing a reserve of power. This becomes
especially advantageous when thinner plate saws are in use.
Most sawmills are also looking to reduce water consumption
for both environmental and financial reasons. Saw guide
lubricants that can provide reduced water content in hog fuel
headed to the co-gen plant are just another way that using the
right lubricant can help to reduce costs in the sawmill industry.
Dynamic Sawmill Systems Inc
Dynamic is a Canadian-based company specializing in the
development of innovative wear guide system technologies.
Dynamic presently manufactures and sells a bandsaw wear guide
system that has been called among the most significant bandsaw
wear guide improvements in over 25 years, says the company.
The system can be installed on new bandsaws or easily adapted
to presently installed horizontal, vertical and angle guide units.
The technology centres around a patent-pending, multi-use,
replaceable wear pad that does away with removing the wear
guides from the saw during a standard guide change, transporting
these heavy units to the filing room, resurfacing the wear blocks,
re-calibration, human error and re-installation. Each pad has
four potential working surfaces, so when the pad is rotated end
for end, flipped over, or replaced (which takes less than two
minutes for both upper and lower guides), the sawblade offset
is automatically re-set to within +/- 0.002”. The company has
provided systems for sawblade widths of 1” to 14”, single and
double cut, with some systems having been in daily operation for
over two years.
Accurate and consistent saw guides allow for accurate
spacing between the saw guides and the saws. Less accurate saw
guides cause larger fluctuations in this spacing, which causes an
increase in board deviation when this spacing gets larger and
increases the incidents of saws heating up and folding over when
this spacing gets smaller. Saw guides are key to efficient sawmill
operation—only the most accurate will ensure the best recovery
of wood fibre.
Modern Engineering manufactures ultra high precision edger
saw guides to +/- 0.0002” accuracy. Aluminum saw guides are
CNC machined and honed to the final size after engineering
hardcoat anodizing is applied. This ensures that all aluminum
saw guides meet the precise tolerances.
Steel saw guides are CNC machined and then ground to
final size to ensure that they meet the same precise tolerances.
All sizes are confirmed with leading edge Zeiss CNC Coordinate
Measuring Machines to ensure accuracy and quality.
Optimil Machinery Inc
Optimil board and gang edgers are supplied with aluminum
or steel saw guides. On site CNC machine centres allow Optimil
to deliver a premium product in a timely manner. The company
can also provide saw guide conversions to existing saw boxes,
enabling customers to achieve tighter target sizes and less sawing
The user-friendly Optimil saw guide lube panel provides
a simple solution to mix the air, water and saw oil. And the
Optimil pneumatic Babbitt fixture allows customers to pour
multiple bolt-on guide pads with a single pour. This reliable
solution saves the filers time and can be designed to work with
any saw guides.
Pacific/Hoe Saw and Knife Company
Pacific/Hoe Saw and Knife Company manufactures a full
range of circle and band guide systems, replacement guide arms, E-Z Flow lubrication systems and guide milling machines,
including the all new JM-100A totally enclosed, automatic band
guide milling machine. Circular guide arms include nitrited
steel, chromed steel, aircraft grade hard anodized aluminum,
and Pacific/Hoe is introducing the all-new “Steelite” lightweight
chromed steel guide arm.
E-Z Flow lube systems are custom designed for circle and
band applications and include cabinets and remote operation
controls. Band guide systems are custom measured and designed
for single or multiple band mills. There are over 600 cartridge
style Pac/Hoe systems in operation.
The new “Steelite guide arms” are approximately 60 per
cent lighter than regular steel arms and about 15 per cent
heavier than aluminum. They are chromed for added hardness
and corrosion resistance. Aluminum arms have become more
expensive and there is always the problem of both handling and
saw damage, but Steelite gets around all of this and is extremely
says the company.
Rockwell Industries has been manufacturing saw guides
for over 12 years. All of their guides are precision machined
using the latest, high quality CNC machinery with tolerances to
+.0005, with hardening up to RC 60.
Rockwell can manufacture guides of any size, any shape, for
any edger, using either aluminum or steel. They also manufacture
pneumatically operated Babbitt molds. Free shipping offered for
orders of 30 or more.
USNR has been designing and installing saw guides and kerf
reduction technologies since 1934, and brings that experience to
Its CNC machining technology provides greater accuracy
and part-to-part consistency, which translates into durability and
sawing accuracy in the mill. That’s why so many mills choose
USNR saw guides, even for non-USNR machinery.
USNR’s aluminum saw guides are made from aerospacequality
aluminum (T7075-T6), and are precision-ground on
all critical surfaces prior to hardcoat anodizing. The hardcoat
anodizing results in all surfaces with minimum 72 RC, which
significantly increases wear resistance.
The company’s steel saw guides are made from 4140 steel,
heat treated to an RC of 48-52, and are precision ground on all
critical surfaces, ensuring ± .0002” accuracy. The heat-treated
steel guides can be chromed, nickel plated, or nitrated.
All USNR saw guides are designed in the Solid Modeling
CAD environment so there are no surprises during installation.
Vancouver Gear Works Ltd
VanGear has always strived to manufacture only the highest
quality guides. Starting with computer aided drafting (CAD)
or from samples, these parts are designed or re-engineered
to the mill’s requirements. Once approved, the guides are
manufactured on the company’s twin bed CNC milling machine,
using the highest quality materials—T6-6061 aluminum or
VanGear ensures quality. Each job is checked on its CNC
coordinate measuring machine. This final step assures that
each guide produced by VanGear is 100 per cent right the first
time. When requested, the company will test and evaluate a mill’s current configuration and make
recommendations for increasing the
performance and life of its guides.
VanGear has an in-house quality
control inspector, who has the authority to
reject any guide, at any time throughout
the production stages. The quality control
inspector also inspects all guides before
they can be shipped. If requested, the
company can provide a certificate of
inspection for any order.
Williams and White
Saw guide accuracy is essential for
sawmills if they are going to increase
wood recovery from increasingly costly
logs. And Williams and White (W&W)
has led the way in improving efficiencies
in the manufacturing of precision saw
guides. Its design team continues to
improve the manufacturing process to
reduce the cost of precision saw guides
for sawmills worldwide.
The company has developed a
purpose-built guide to handle the added
stress of curved sawing. These saw guides
are part of the W&W solution offered
to filing rooms. The W&W Saw Guide
Program is high quality and economical.
The Premium Series saw guides are
developed for curve sawing and are 30
per cent stronger than standard for their
weight. Engineered drawings are supplied
Guides are hard anodized to Mill
Spec. 8625 Type 3, with sizing tolerance
to +/- 0.0002” parallel and are CNC
machined. Guides are also part-numbered
and have individual serial numbers.