Enerpac SC-Series - Manual (Page 8)

Single-Acting Cylinders
Single-acting cylinders have a vent hole in the bottom port of the cylinder. For the
mounting option using the open plate design (Figure 2, Page 4), care should be taken to
prevent coolant or cutting fluids from entering the vent hole. If the vent hole is subject-
ed to a continuous coolant flood condition, the blind cavity design (Figure 3, Page 4) is
recommended. This design allows the spring chamber to be vented to an area that is
free of fluids and contaminants.
OPERATION
Swing cylinders rotate 90° during the first portion of the stroke, continuing without rota-
tion for the final clamping stroke. The straight downward stroke is the clamping stroke
of the cylinder. Clamping force must be applied only during the vertical travel, not dur-
ing the swing motion.
) CAUTION
— If the clamping force is applied during the rotation portion of the stroke,
internal plunger damage will result.
— To ensure maximum cylinder performance and safety, be sure all hydraulic
connections, hoses, and fittings are properly sealed and fully tightened.
— Be sure all items are rated to withstand system pressures. Under-rated
components will not withstand higher pressure. Using under-rated compo-
nents will lead to equipment damage and possible personal injury.
Pressure and Flow Rate
Clamp arm length (L) determines operating pressure setting and flow rate.
See Operating Specifications — Maximum Flow Rate Chart on page 2 for clamp arm
length, pressure setting, and flow rate. Set operating pressure and flow rate according to
the limits established by the length of the clamp arm. Do not exceed the load-to-length
pressure ratios. As the arm length increases, the clamping force and maximum operat-
ing pressure are reduced.
) CAUTION
It is very important that you use the correct pressure and flow settings.
Operating outside these limits will cause damage to the swing cylinder. Damage
caused by exceeding rated pressure and maximum flow is NOT covered by war-
ranty.
MAINTENANCE
Maintenance is required when wear or leakage is noticed. Occasionally inspect all com-
ponents to detect any problem requiring service and maintenance. Enerpac offers ready-
to-use repair part kits. Repair parts sheets are available with assembly drawing and
parts list. Contact Enerpac.
IMPORTANT: Consult the repair parts sheet for service information about correct
assembly and disassembly. Incorrect maintenace and service, such as wrong torque val-
ues, may cause product malfunctions and/or personal injury.
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Figure 9