Specifications
Compact Hydraulic Cylinders
Series CHD
Catalog HY08-M1137-3/NA
20
www.millerfluidpower.com
Miller Fluid Power
Des Plaines, IL
Milton, Ontario Canada
Theoretical Push and Pull Forces
The cylinder output forces are derived from the formula:
F = P x A
10000
Where F = Force in kN.
P = Pressure at the cylinder in bar.
A = Effective area of cylinder piston in
square mm.
To determine the bore size for the application take the
following steps.
Series CHD
Pressure Rating
Bore
Ø
Maximum Working
Pressure in bar
20 207
25 207
32 207
40 207
50 207
63 207
80 207
Cylinder Weights and Force
1. Select the Operating Pressure column closest to that
desired.
2. In the same column, identify the force required to
move the load (always rounding up). If the piston rod is
in compression use the ‘Push’ row and if the piston rod
is in tension use the ‘Pull’ row.
3. In the row to the left is the bore required.
If the cylinder envelope dimensions are too large for
the application, increase the operating pressure to the
maximum pressure in the table below, if possible, and
repeat steps 1 - 3.
Cylinder Weights
To determine the weight of a Series CHD cylinder,
first select the proper basic zero stroke weight for the
mounting required, and then calculate the weight of the
Table A Single Rod End CHD Cylinder Weights in kg.
cylinder stroke and add the result to the basic weight.
For extra rod extension, use piston rod weights per
mm in Table C.
Table B Double Rod End CHD Cylinder Weights in kg.
Table C Piston rod
weights in kg.
Push and Pull Force in kN
Equivalents
1 kN = 224.81 pounds force
1 bar = 14.50 psi
1 mm = .03937 inch
1 mm
2
= .00155 inch
2
Equivalent
1 kg = 2.2046 pounds
Rod
Ø
Piston Rod
Weight per mm
12
0.001
14 0.001
18 0.002
22 0.003
28
0.005
36 0.008
45 0.012
Bore
Ø
Rod
Ø
Operating
Direction
Piston
Area
(mm²)
Operating Pressure (Bar)
50 75 100 125 150 175 207
20 12
Push 314 1.57 2.36 3.14 3.93 4.71 5.50 6.50
Pull 201 1.01 1.51 2.01 2.51 3.02 3.52 4.16
25
14
Push 491 2.45 3.68 4.91 6.14 7.36 8.59 10.2
Pull 337 1.68 2.53 3.37 4.21 5.05 5.90 6.97
32
18
Push 804 4.02 6.03 8.04 10.1 12.1 14.1 16.6
Pull 550 2.75 4.12 5.50 6.87 8.25 9.62 11.4
40 22
Push 1,257 6.28 9.42 12.6 15.7 18.8 22.0 26.0
Pull 877 4.38 6.57 8.8 11.0 13.1 15.3 18.1
50 28
Push 1,963 9.82 14.7 19.6 24.5 29.5 34.4 40.6
Pull 1,348 6.74 10.1 13.5 16.8 20.2 23.6 27.9
63 36
Push 3,117 15.6 23.4 31.2 39.0 46.8 54.6 64.5
Pull 2,099 10.5 15.7 21.0 26.2 31.5 36.7 43.5
80 45
Push 5,027 25.1 37.7 50.3 62.8 75.4 88.0 104
Pull 3,436 17.2 25.8 34.4 43.0 51.5 60.1 71.1
Bore
Ø
Rod
Ø
Single Rod Cylinders
Basic Weight at Zero Stroke Per
mm
Stroke
Basic Weight
at Zero Stroke
Per
mm
Stroke
Basic Weight
at Zero Stroke
Per
mm
Stroke
T TN,
TR
A, M AN, AR,
MN, MR
J, H C CN
20 12
0.57 0.58 0.61 0.62 0.013 0.84 0.013 - - -
25 14 0.80 0.81 0.84 0.85 0.016 1.17 0.017 0.71 0.73 0.015
32 18 1.39 1.42 1.45 1.48 0.024 1.92 0.025 1.41 1.43 0.026
40 22 1.87 1.90 1.97 2.01 0.029 2.81 0.031 1.93 1.96 0.033
50 28 2.61 2.67 2.79 2.85 0.036 4.20 0.038 2.82 2.88 0.044
63 36 4.11 4.20 4.34 4.42 0.047 6.11 0.051 4.69 4.78 0.063
80 45 7.19 7.33 7.49 7.62 0.067 10.7 0.072 - - -
Bore
Ø
Rod
Ø
Double Rod Cylinders
Basic Weight at Zero Stroke Per
mm
Stroke
Basic Weight
at Zero Stroke
Per
mm
Stroke
Basic Weight
at Zero Stroke
Per
mm
Stroke
T TN A, M AN, MN
J C CN
20 12
0.60 0.61 0.64 0.65 0.013 0.87 0.014 - - -
25 14 0.83 0.85 0.87 0.89 0.017 1.21 0.018 0.75 0.77 0.016
32 18 1.46 1.48 1.52 1.54 0.026 1.98 0.027 1.47 1.50 0.028
40 22 1.97 2.01 2.08 2.11 0.032 2.92 0.034 2.03 2.07 0.036
50 28 2.81 2.87 2.99 3.05 0.041 4.40 0.043 3.02 3.08 0.049
63 36 4.52 4.61 4.75 4.83 0.055 6.53 0.059 5.10 5.19 0.071
80 45 7.99 8.12 8.28 8.42 0.080 11.5 0.085 - - -