Sheffer A SERIES - Manual (Page 22)

Sheffer
Cylinders
are Better
Cylinders
The performance
you expect from a
quality cylinder
© Longer lifetime of service
© Minimal downtime
© Fast and easy installation
© Simple, affordable repairs
© No special tool required
to make repairs
© Lower operating cost
© More options available
Studded Rod End
(Standard, except on C20 Series)
Sheffer’s rod end design virtually
eliminates rod end breakage! The
rod ends of many competitive cylin-
ders are cut from the piston rod, cre-
ating a weak point at the threads.
Our studded connection routes
stress factors away from this weak
point, so rod-end failure is nearly
impossible. Also, rod ends can be
replaced without changing the entire
piston rod, thereby reducing down-
time and repair costs.
Four Full Wrench Flats
(Standard on all Sheffer cylinders)
For convenience, time and money
savings during cylinder installation
or replacement, Sheffer cylinders are
produced with four full wrench flats.
With our design, a flat is always posi-
tioned for a good wrench hold with
normal tools. Our cylinders come
this way because unconventional
tools and methods are often used
when a wrench flat isn’t convenient
— possibly marring the rod surface
which can damage seals and cause
leaks.
Removable Rod Gland
(Not available on select small bore cylinders)
The wiper and pressure seals on
Sheffer cylinders are encapsulated
behind a removable rod gland that is
bolted to the front of the cylinder.
“On line” changing of seals is fast
and easy using normal tools,
without disturbing torque
settings, removing the
rod bearing or tear-
ing down the
cylinder. This fea-
ture dramatically
increases
productivity by
reducing downtime
and repair costs.
Separate Rod Bearing
(Standard on most Sheffer cylinders)
On Sheffer cylinders, the rod bearing is
a hydrodynamic “flooded bearing”,
which greatly reduces wear and
extends part life. It’s also inboard
from the seals and a separate compo-
nent, so if changeout is needed, the
seals need not be replaced — and
vice versa. No special tools are
required. Moreover, the rod bearing
can be removed and replaced without
having to loosen tie rods or tear down
the cylinder. That saves downtime,
plus the cost of parts and labor.
Chamfered Tube Ends
(Standard on most Sheffer cylinders)
A small angle, or chamfer, is
machined into the end of each
Sheffer piston tube for quick, easy
and reliable repairs. If the piston
and rod have been removed (to
replace seals for example), when the
piston is pushed back in, the chamfer
physically compresses the seal into
the piston like a built-in funnel.
Special compression tools aren’t
needed during assembly and chances
of seal damage are minimized. The
chamfer design also prohibits extru-
sion of the O-ring once the tie rods
are tightened. This forms a superior
seal and diminishes the chance of
leakage at the head and cap joint.
Slipper Piston Seal
& Bearing
(Standard on all hydraulic cylinders)
The slipper piston seal and bearing
on Sheffer cylinders are a standard
option, not a cost-additive feature
other manufacturers offer when their
designs are inadequate. Our
Teflon
® -based surfaces are an excel-
lent lubricant, demonstrating a very
low coefficient of friction with low
heat. As the cylinder moves back
and forth, the Teflon also migrates
into the pores of the cylinder tube,
creating an even better lubricating
surface. Slipper seals and bearings
— another reason Sheffer cylinders
reduce costs and downtime while
increasing productivity.
The Sheffer Advantage
Our Cylinders are Designed
with the End User in Mind
A-21