Specifications
Heavy-Duty Hydraulic Cylinders
HV2 Series
Catalog HY08-M1140-3/NA
58
www.milleruidpower.com
Miller Fluid Power
Des Plaines, IL
Milton, Ontario Canada
Ports
1
2
3
4
Table B
SAE Straight Thread O-Ring Ports
Size Tube Thread Size Tube Thread
No. O.D. (In.) Size No. O.D. (In.) Size
Note: For the pressure ratings of individual connectors, contact
your connector supplier. Hydraulic cylinders applied with meter
out or deceleration circuits are subject to intensied pressure
at the cylinder piston rod end. The rod end pressure is approxi-
mately equal to:
Eective Cap End Piston Area
Eective Rod End Piston Area
x Operating Pressure
International Ports
Other port congurations to meet international requirements
are available at extra cost. Miller HV2 Series cylinders can be
supplied, on request, with British standard taper port (BSPT).
Such port has a taper of 1 in 16 measured on the diameter
(
1
/16" per inch). The thread form is Whitworth System, and size
and number of threads per inch are as follows:
Table C
British Standard Pipe Threads
British standard parallel internal threads are designated as
BSPP and have the same thread form and number of threads
per inch as the BSPT type and can be supplied, on request, at
extra cost. Unless otherwise specied, the BSPP or BSPT port
size supplied will be the same nominal pipe size as the NPTF
port for a given bore size cylinder.
Metric ports can also be supplied to order at extra cost. See
table below for standard port size for each bore.
1
/8
1
/4
3
/8
1
/2
3
/4
1
1
1
/4
1
1
/2
2
Ports
HV2 Series cylinders can be supplied with SAE straight O-ring
ports or NPTF pipe thread ports. If specied on your order,
extra ports can be provided on the sides of heads or caps that
are not occupied by mountings or cushion valve.
Standard port location is position 1 as shown on line
drawings in product catalog and Figure 1 below. Cushion
adjustment needle and check valves are at positions 2 and
4 (or 3), depending on mounting style. Heads or caps
which do not have an integral mounting can be rotated and
assembled with ports at 90° or 180° from standard position.
Mounting styles on which head or cap can be rotated at no
extra charge are shown in Table A below. To order, specify by
position number. In such assemblies the cushion adjustment
needle and check valve rotate accordingly since their
relationship with port position does not change.
Figure 1
Head (Rod) End Head Cap
Table A
Ports can be supplied at positions other than those shown in
Table A at an extra charge. To order, specify port position as
shown in Figure 1.
Straight Thread Ports
The SAE straight thread O-ring port is recommended for
hydraulic applications. Miller will furnish this port conguration
at positions shown in Table A. This port can also be provided
at positions other than those shown in Table A at an extra
charge. SAE port size numbers are listed next to the NPTF
pipe thread counterparts for each bore size in the respective
product catalogs. Size number, tube O.D., and port thread size
for SAE ports are listed in Table B.
Port Position Available
Mounting Style Head End Cap End
51, 52, 53, 61, 62,
65, 66, 87, 89 1, 2, 3 or 4 1, 2, 3 or 4
68, 82, 84, 94 1, 2, 3 or 4 1 or 3
67, 81 1 or 3 1, 2, 3 or 4
72, 74 1 1
0.13
0.19
0.25
0.31
0.38
0.50
0.63
12
—
16
20
24
32
—
0.75
—
1.00
1.25
1.50
2.00
—
1
1
/16 - 12
—
1
5
/16 - 12
1
5
/8 - 12
1
7
/8 - 12
2
1
/2 - 12
—
2
3
4
5
6
8
10
5
/16 - 24
3
/8 - 24
7
/16 - 20
1
/2 - 20
9
/16 - 18
3
/4 - 16
7
/8 - 14
28
19
19
14
14
11
11
11
11
.383
.518
.656
.825
1.041
1.309
1.650
1.882
2.347
Nominal No. Threads Pipe
Pipe Size Per Inch O.D.
Table D – Standard Port Sizes
F
S N SAE Code I BSPT
Bore SAE NPTF 61 Flange ISO 6149 BSPP Metric
1.50 8 1/2 N/A M22 x 1.5 1/2 M22 x 1.5
2.00 8 1/2 N/A M22 x 1.5 1/2 M22 x 1.5
2.50 8 1/2 1/2* M22 x 1.5 1/2 M22 x 1.5
3.25 12 3/4 3/4 M27 x 2 3/4 M27 x 2
4.00 12 3/4 3/4 M27 x 2 3/4 M27 x 2
5.00 12 3/4 3/4 M27 x 2 3/4 M27 x 2
6.00 16 1 1 M33 x 2 1 M33 x 2
F
S N SAE Code I BSPT
Bore SAE NPTF 61 Flange ISO 6149 BSPP Metric
7.00 20 1 1/4 1 1/4 M42 x 2 1 1/4 M42 x 2
8.00 24 1 1/2 1 1/2 M48 x 2 1 1/2 M48 x 2
10.00 24 1 1/2 2 M48 x 2 1 1/2 M48 x 2
12.00 24 1 1/2 2 1/2 M48 x 2 1 1/2 M48 x 2
14.00 24 1 1/2 1 1/2 M48 x 2 1 1/2 M48 x 2
16.00-
24 – 3 – – –
20.00
*Available with 1 inch rod diameter only.