© Vektek, May 2022 800-992-0236 www.vektek.com
Double Acting
Easy to use, thread-in Push/Pull cartridge cylinders
in six capacities.
Convert to single acting by installing the
included return spring.
Threaded Push/Pull design eliminates the need for
additional retention.
Short strokes specifically designed for use with
bolt-down clamping elements.
360° oil feed location simplifies oil passages.
Model
No.
Cylinder
Capacity*
Stroke**
Plunger
Thread***
Min.
Length
Effective Piston Area
(sq. in.)
Oil Capacity
(cu. in.)
Extend Retract Extend Retract Extend Retract
Double Acting (D/A) Cylinders, actuated hydraulically both directions.****
21-0206-00
1,500 980 0.25
6-32
1.44 0.31 0.20 0.08 0.05
21-0206-01 8-32
21-0209-00
2,900 2,000 0.25
8-32
1.44 0.60 0.40 0.15 0.10
21-0209-01 1/4-20
21-0210-00
3,900 2,950 0.25
1/4-20
1.59 0.79 0.59 0.20 0.15
21-0210-01 5/16-18
21-0213-00
7,400 5,200 0.25
3/8-16 1.59
1.48 1.04 0.37 0.26
21-0213-01 1/2-13 1.66
21-0216-00
12,000 9,000 0.38
1/2-13 1.88
2.41 1.80 0.90 0.68
21-0216-01 5/8-11 2.13
21-0221-00 22,000 17,100 0.38 5/8-11 2.13 4.43 3.44 1.66 1.29
* Cylinder capacities are listed at 5,000 PSI maximum operating pressure. The minimum operating pressure is 500 psi for D/A
and 750 psi for S/A operation. The cylinder force is adjustable by varying the hydraulic pressure to the cylinder. To determine
approximate output of the cylinder for your application, divide the cylinder capacity shown in the table by 5,000 PSI and
multiply the resultant by your system pressure in PSI to obtain the approximate cylinder force for your application. (Actual force
may vary slightly due to friction loss, seal and wiper drag and/or return springs.)
** Cylinder stroke may exceed stroke of the clamping element. Limiting cylinder stroke may be required to
ensure proper operation of clamping element.
*** At full cylinder capacity, fastener life will be limited, should be considered service item and replaced frequently to avoid plunger
damage. Models 21-0206-00, 21-0209-00, 21-0210-00 and 21-0213-00 not recommended for use above 2,500 psi.
**** Install included return spring for single acting operation. Return spring and anti-rotation pins included with cylinder.
Cylinders
Cartridge Mount Push/Pull
Dimensions
Model
No.*
A B C D E F G H J K L M N P Q R S
Double Acting (D/A) Cylinders, actuated hydraulically both directions.
21-0206-00
1.25 1.69 0.25 1.13
6-32 x 0.21
0.38 0.25 1-16 UN 0.13 0.50 0.81 0.72 0.08 0.66 0.28 0.09 0.22
21-0206-01 8-32 x 0.25
21-0209-00
1.63 1.69 0.25 1.13
8-32 x 0.33
0.50 0.25 1 5/16-16 UN 0.19 0.63 1.19 1.10 0.08 0.66 0.31 0.09 0.27
21-0209-01 1/4-20 x 0.38
21-0210-00
1.75 1.84 0.25 1.19
1/4-20 x 0.38
0.50 0.31 1 1/2-16 UN 0.19 0.63 1.31 1.22 0.08 0.66 0.31 0.13 0.28
21-0210-01 5/16-18 x 0.47
21-0213-00
2.13
1.84
0.25 1.19
3/8-16 x 0.50
0.75 0.31 1 7/8-16 UN 0.19 0.81 1.75 1.66 0.08 0.66 0.53 0.13 0.44
21-0213-01 1.91 1/2-13 x 0.50
21-0216-00
2.63
2.31
0.38 1.31
1/2-13 x 0.50
0.88 0.44 2 3/8-16 UN 0.26 1.00 2.12 2.00 0.08 0.78 0.64 0.25 0.50
21-0216-01 2.50 5/8-11 x 0.63
21-0221-00 3.38 2.70 0.38 1.69 5/8-11 x 0.63 1.13 0.44 3 1/8-16 UN 0.26
1.38 2.88 2.79 0.16 0.99 0.78 0.25 0.79
Cylinders
Cartridge Mount Push/Pull
F-16
www.vektek.com 800-992-0236 © Vektek, May 2022
Cavity Dimensions
Model
No.
Cap. A B C D E F G H J* K L M N** P*** Q***R***
Cartridge
Torque
(ft. - lbs.)
****
Double Acting (D/A) Cylinders, actuated hydraulically both directions.
21-0206-00
1,500 0.813 1.27 1.080 0.939 0.60 1-16 0.48 0.26 0.116 0.39 0.75 1.130 0.16 0.125 0.625 0.44 25
21-0206-01
21-0209-00
3,000 1.188 1.65 1.393 1.252 0.68 1 5/16-16 0.50 0.26 0.116 0.39 0.75 1.130 0.18 0.125 0.625 0.53 35
21-0209-01
21-0210-00
3,900 1.313 1.77 1.580 1.439 0.67 1 1/2-16 0.53 0.33 0.116 0.46 0.81 1.192 0.18 0.156 0.625 0.56 60
21-0210-01
21-0213-00
7,400 1.751 2.15 1.955 1.814 0.75 1 7/8-16 0.59 0.33 0.116 0.46 0.81 1.192 0.33 0.156 0.625 0.88 65
21-0213-01
21-0216-00
12,000 2.126 2.64 2.455 2.314 0.70 2 3/8-16 0.59 0.45 0.116 0.45 0.93 1.318 0.35 0.281 0.625 1.00 160
21-0216-01
21-0221-00 22,000 2.876 3.39 3.205 3.064 0.88 3 1/8-16
0.72 0.45 0.116 0.58 1.31 1.693 0.40 0.281 0.625 1.57 200
* The 15° and 45° features of the cavity can be formed using an SAE 12, reduced spot face cutter except on models 21-0206-00 and 21-0206-01
** N is intended for S/A cylinders (only) to prevent interference with the return spring. For D/A operation the feed can be
positioned anywhere in the bottom of the cavity. Install included return spring for S/A operation. Return spring and
anti-rotate pins are included with cylinder.
*** Features for use with anti-rotate pins.
**** Lubricate O-Rings with grease prior to installation.
4X J
SPANNER HOLE
A
Q
SPRING CAVITY
2X R
2X N
RETRACT FEED HOLE
E
THREAD X DEPTH
D
B
G
C STROKE
P
H
THREAD
L
M
2X S
F
2X K
2X K
ILS210104 REV F
Cylinders
Cartridge Mount Push/Pull
*Install includes return spring for S/A operation.
*NOTE: Anti-rotation pins intended for hand
installation of bolt only. Do not
torque bolt against anti-rotation pins.
40
J
+.005
M
-.000
H MIN
B
C .005
FROM BOTTOM OF COUNTERBORE
MINOR
D .005 E
F THREAD UN
G MIN
A
.001
-A-
N MAX
K MIN
L MAX
.125
MIN
2X P Q
R
R.020
MAX
15 1
45 5
ILS210105 REV F
.005 A
.005 A
NOTE: FLEXIBLE HONING/ BALL HONING
OF CAVITY IS STRONGLY RECOMMENDED.
S/A BREATHER HOLE LOCATION
D/A EXTEND FEED HOLE LOCATION
BREAK EDGE
OF 15
RAMP
.010 MAX
32
64
ILS210103 REV D
F-17
Cylinders
Cartridge Mount Push/Pull
