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SECTION 21 -
SPENCER FRANKLIN HYDRACLAMP, HYDRAULICS
AND PNEUMATICS
WDS
&
0845 606 66 77
•
:
www.wdsltd.co.uk•
*
sales@wdsltd.co.uk21-22
WDS
www.wdsltd.co.ukPowRlock PowRam
Head Long-stroke
SF-3550B
45°
BLEED SCREW
F
G
B
M16
C
A
E
D
1/4" B.S.P.
2 1/2 - 16 - UNS
3550B
Stroke*
mm
Effective
Area cm ²
Volume cm³
Dimensions in mm
(kg)
WDS No.
Seal Kit No.
A B C D E
F G
25.4 22.9
58.17 66.58 25.4 9.53 12.7 119.06 31.75 76.2 2.27
SF-3550B SF-4798
Body/Cap Thread 2½ - 16 - UNS
* Do not exceed Maximum Stroke
Mounting: To include these heads in a fixture it is only necessary to retain them in position by the tapped hole in the rear spigot, allowing the back
face of each head to react against a rigid face.
OPTIONAL VARIATIONS FOR STANDARD TYPE 3550B POWRAM
Part No SF-3550BFL - Front flange mounted (circular) instead of screwed cap.
Note: Unless otherwise stated assume there are four counter
bored holes equi-spaced on ØB.
Dimensions in mm
Flange No.
A B C D E F
108 85.7 10.4 30.1 16.6 10.3 SF-3551FL
C
C
A
D
F
E
C
B
LANGE FOR:
520-3525
550B
100MF-3300MF
120A
500
700
080A
NOTE: All graphs are Rams with Springs fitted.
Graphs are calculated using theoretical pressures and
actual values will be less due to loss in system pressure.
TECHNICAL INFORMATION
-
Max Operating Pressure =
350 BAR (5000 P.S.I)
T
heoretical Thrust (N) =
Oil Pressure (bar) x Effective Area (cm²)
Re
fer to page 21-46 & 21-47 for
more technical information