Mack Corporation presents an expanding
line of proprietary products for the automation and automatic
processing industries. These products are unique in concept,
of advanced design and manufactured to the highest quality standards
for universal application in equipment destined to improve quality,
increase production and reduce manufacturing cost.
LO-PROfile® Cylinders should be
centered with the thrust line of the work load within a few thousandths
of an inch and square within a fraction of a degree. Mount an
oil/mist unit upstream for internal lubrication. Where such devices
are not practical, replace seals and lubricate internal parts
at regular intervals. SERVICE KITS are available with seals and
factory approved lubricant.
In most cases, force output from a
cylinder can be calculated with more precision than predicting
load requirements for it's application. A good "rule of
thumb" is to select a cylinder which gives a force at least
130% of the estimated operating load.
Force out put from a cylinder is constant over the full range
of travel and is simply the product of operating pressure times
the effective area of the piston. FORCE(lbs) = PRESSURE(psi)
times NET AREA(sq.in.). Mack Corp engineering specifications
include piston head and rod diameters (with net areas) together
with maximum operating pressure to aid in these calculations.
Permanently attached to each cylinder is a metal nameplate specifying
the part number, serial number, company name and maximum operating
pressure. All products have the appropriate safety factor but
- DO NOT EXCEED THE MAXIMUM OPERATING PRESSURE.
The effect of seal friction can usually be ignored except
for small cylinders operating at low pressure. There is a phenomenon
called "stiction" with exceptionally high break-away
friction when cylinders stand idle for long periods. Seal friction
will quickly return to a much lower level following the first
When planning control circuits using plant air, a design operating
pressure of 80 PSI should be used since higher pressure
may not be available when drain is heavy in the overall system.
Pressure in a branch line can be reduced with a pressure regulator.