NFPA ShotPin/ Cylinders - Fluidraulics Inc

Dual Piston Selection
Dual Pistons (two pistons with a spacer in between) are needed in some cylinders with long strokes. The purpose of a dual
piston is to prevent binding or jack-knifing. Below is a chart that shows dual piston length in relation to mounting style
(from previous page) and stroke.
DUAL PISTON CHART
S t ro k e
Minimum Dual Piston Length
L e n g t h Mounting Style #1 Mounting Style #2 Mounting Style #3 Mounting Style #4
2 0 " 0 0 0 0
2 5 " 0 0 0 1 1/2
3 0 " 0 0 0 2
4 0 " 0 0 0 3
5 0 " 0 0 1 1/2 4
A p p roximate Cylinder Weight Chart (lbs.)
Bore
1 1/2
2
2 1/2
3 1/4
4
Alignment Coupler
KK THREAD
G ACROSS FLATS
ØF SHANK
(1/16" RADIAL FLOAT)
(1º SPHERICAL FLOAT)
R o d M X 0 M F 1 MP1, MP2 MX1, MX2 M T 1 Per inch
D i a m e t e r M S 4 M F 2 M P 4 MX3, MS1,
M S 2
M T 2 of stro k e
5/8" 2.1 2.8 2.8 2.4 2.6 0.20
1" 2.7 3.4 3.4 3.0 3.2 0.35
5/8" 2.7 3.8 3.7 3.1 3.2 0.25
1" 3.3 4.4 4.3 3.7 3.8 0.40
5/8" 3.7 5.2 4.9 4.2 4.2 0.26
1" 4.3 5.8 5.5 4.8 4.8 0.41
1" 6.4 10.6 9.6 7.2 6.9 0.47
1 3/8" 7.2 11.4 11.3 8.0 7.7 0.67
1" 9.0 14.0 13.1 9.9 9.5 0.50
1 3/8" 9.9 14.9 14.0 10.8 10.4 0.70
A
D
C
KK THREAD
A DEEP
B
E
ACROSS
FLATS
Dimensional Specifications
Part # A B C D E F G K K Max Pull Load
L640 .75 1.25 2.00 .50 1.13 .63 .56 7 /16-20 2,500 LB.
L641 .75 1.25 2.00 .50 1.13 .63 .56 1/2-20 3,500 LB.
L642 1.13 1.75 2.31 .31 1.50 .97 .88 3/4-16 8,500 LB.
L643 1.13 1.75 2.31 .31 1.50 .97 .88 7/8-14 8,500 LB.
L644 1.63 2.50 2.94 50 2.25 1.38 1.25 1-14 16,000 LB.
L645 1.63 2.50 2.94 50 2.25 1.38 1.25 1 1/4-12 16,000 LB.
10