Enerpac SC-Series - Manual (Page 7)

Attaching Clamp Arm
1. Remove the retaining ring (A) from the top of
the plunger (B).
2. Slide the clamp arm (C) down over the plunger
and use a pliers to push the retaining ring back
onto the plunger groove. Orient the retaining
ring so the retaining ring gap will face the back
or solid portion of the clamp arm. See illustra-
tion.
3. Move the clamp arm up until it is firmly against the retaining ring and in the desired
position. While maintaining this position, torque the clamp arm bolt (D) to specifica-
tion listed below.
) )
CAUTION
Inadequate torquing of the clamp arm bolt could cause the arm to slip during
operation. BE SURE TO USE QUALITY GRADE 8 (12.9 DIN 912) SOCKET HEAD
CAP SCREWS (supplied with standard clamp arms).
Mounting the Cylinder
When designing your hydraulic circuit, consider the factors listed in PRELIMINARY
INFORMATION on page 3. For more information about plumbing hydraulic circuits,
see your Enerpac Workholding Catalog.
Mounting cavities must be prepared according to
the specifications shown on pages 4 and 5. Use care
when preparing the fixture. Machine fixture bore
holes accurately. To prevent leakage, provide a fix-
ture mounting surface roughness average (Ra) not
to exceed 1,6 µm (63 µin.) Ensure that there are no
exposed metal burrs where the oil feed holes meet
the cylinder cavity.
) CAUTION
Thoroughly flush all fixture drill passages to
prevent debris from entering the cylinder during
operation.
Lubricate external cylinder o-rings prior to mount-
ing the cylinder in the cavity. Carefully install the
cylinder until the metal ring (E) contacts the coun-
terbore face as shown in Figure 8. Torque cylinder body into mounting plate using the
upper hex portion of the cylinder, not the clamp arm. See the table below for torque
values.
7
Figure 7
Cylinder Capacity Lubricated Torque
2,2 kN (500 lb.) 16,3 - 20,3 Nm (12 - 15 ft-lb.)
5,6 kN (1250 lb.) 32,5 - 39,3 Nm (24 - 29 ft-lb.)
11,6 kN (2600 lb.) 59,7 - 71,8 Nm (44 - 53 ft-lb.)
Clamp Arm Bolt Torque
E
Figure 8
Cylinder Capacity Installation Torque
2,2 kN (500 lb.) 122 - 149 Nm (90 - 110 ft-lb.)
5,6 kN (1250 lb.) 190 - 217 Nm (140 - 160 ft-lb.)
11,6 kN (2600 lb.) 258 - 285 Nm (190 - 210 ft-lb.)