The main objective in this square head design is to
provide a cylinder to fit minimum space requirements,
coupled with maximum strength and wear characteristic.
The only parts subject to wear are the piston cups, rod
packing and bearing, The life of these parts greatly
increased because of the mechanical stability inherent
in the extra-long piston rod bearing. This reduces
maintenance worries and costly downtime.
The standard cylinder has a wide versatility of
population since all mountings are interchangeable with
all NFPA/JIC cylinders. Cylinders may be mounted in
any position. The piston stroke is made to your
specification, even to the fraction of an inch.
Series 'H' cylinders are rated at 3,000 P.S.I. operating
pressure. Certain mounting styles may be used in
higher pressure non-shock applications. Please consult
Sees 'H' cylinders are designed to perform well in
continuous operation at temperatures ranging from -30°
F. to +200° F. If your needs should extend into other
operating temperatures, consult our distributor for
specific recommendations, giving temperature range,
medium, and cycle time.
Series 'H' cylinders are designed for oil operation,
lubricated with mineral or petroleum-base oils. For
special acetic or gaseous fluids or where synthetic
lubricants are used, consult our distributor, giving full
details and information.
Standard NFPA/JIC mounting styles are shown in this
catalog. For special mountings or combination
mountings, contact our distributor.
Standard cylinders will be furnished with NPTF ports.
SAE straight thread 'O' ring ports, in comparable size to
pipe port can be had optionally at no extra cost. Where
mounting clearances permit, the ports can be had in any
of four positions in either head, Indicate both port
locations by position number 1, 2, 3, or 4. Unless
otherwise specified, the ports will be furnished in
position number 1 (Port position numbers can be located
on each mounting specification diagram.)
Cushioning is achieved by trapping oil between the
piston and cylinder head, then allowing the oil to escape
at a predetermined rate. This is accomplished by
closing off the normal oil passage a the piston nears the
cylinder head, trapping and bleeding oil through an
adjustable needle valve.
Cylinder may be furnished cushioned at both ends
or at either end. If only one end of the stroke is to be
cushioned, in designating the end of the cylinder at
which this cushion action is to take place, the ends of
the cylinder should be referred to as the 'Head" or 'Rod"
end, and the other end as the "Cap" or 'Blind" end. This
will avoid confusion and delay.
Cushioning is designed to properly cushion the
cylinder and is NOT intended to cushion large-inertia
loads. Cushions are not a substitute for speed controls,
or deceleration valves.
ADJUSTABLE CUSHION VALVE
The needle valve provided on cushioned cylinders
permits infinite adjustment of the cushioning effect to
any degree desired. The cushion adjust valve is
supplied at position #2 standard unless otherwise
specified. A cushion ball Check is at position #4
NOTE: Some cylinder and rod combinations will
have a fixed cushion on the rod end and not have a
needle valve adjustment.
The standard piston rod is cold drawn carbon steel with
an induction hardened case of 50 Rc. It is hard chrome
plated and finished to 16 microinches, providing a
smooth, hard. dent and abrasion resistant surface.
These features extend seal and bearing life and reduce
ROD PACKING CARTRIDGE
Our rod packing cartridge is designed as a unitized
assembly, made of SAE 660 bearing bronze. The
unitize rod cartridge is easily removable without
disturbing the torque on the tie rods and by using a
standard Allen wrench. The piston rod bearing is
exceptionally long, providing excellent piston rod
alignment, and contributing to the very long life of the
A polyflex seal is employed to seal the piston rod,
providing a virtually zero leak seal with long life and with
friction held to a minimum. The highly resilient lip is
complete reliability after millions of cycles.
The rod wiper is urethane, of the projecting lip type.
The recess in the cartridge will accept any MS28776 (or
AN6231) standard rod wiper. Alternate materials
include teflon or brass.
A special close grained nodular iron casting is used for a
one-.a piston. The piston is piloted and torqued onto the
piston rod with thread size adjusted to rod diameter.
LOCTITE is used to chemically lock and S the Ion to
the rod permanently.
Polyflex seals are furnished as standard. and provide a
virtually zero leak seal. These seals are generally
accepted by engineers as the most effective seal
All dimensions are in inches. Stroke length tolerance is
± 1/32, Closerr tolerance can be had at extra cost.