Specifications

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www.milleruidpower.com
Heavy-Duty Hydraulic Cylinders
HV2 Series
Catalog HY08-M1140-3/NA
Miller Fluid Power
Des Plaines, IL
Milton, Ontario Canada
Application and Design Data
The spherical bearing life is inuenced by many factors,
i.e., bearing pressure, load direction oscillating angle and
lubrication. The maximum operating pressure ratings of
the spherical bearing mountings are based on standard
commercial bearing ratings. The 4:1 design factor rating is
based on the tensile strength of the material.
The spherical bearings are dimensioned to ensure a
satisfactory bearing life under normal operating conditions.
The bearing races are made of through-hardened steel
and are precision ground. They are phosphate treated
and coated with dry lm lubricant to minimize friction
of contacting surfaces. In the case of a permanent
unidirectional load to the bearing, or other unusual
operating conditions, the use of a larger bearing may be
required.
For longer bearing life, regular lubrication will protect the
spherical plain bearing from premature wear and corrosion.
Rust-inhibiting EP greases of lithium/lead base, preferably
with molybdenum disulphide additives are particularly
suited. The radial bearings have lubricating holes and
grooves in the races permitting lubrication. The bearing
housings at the cap and rod end are provided with grease
ttings for lubrication.
Maximum angle of swivel in relation to the center line of
the pivot pin is shown as angle a in the table below. It
is recommended that this angle is not exceeded when
mounting the cylinder.
Mounting Information
Head End Mounting
Cap End Mounting
Recommended maximum swivel angle on each side of
the cylinder centerline.
Table 1
Note: Dimension X is the maximum o center mounting of the cylinder.
To determine dimension X for various stroke lengths multiply distance
between pivot pin holes by tangent of angle a. For extended position use
X = XL + 2X stroke.
X
X
XL + STROKE
a
a
XL + STROKE
X
X
a
a
Head End Mounted Cap End Mounted
Bore Angle a Tan. of a Angle a Tan. of a
1.50 2.00° 0.035 2.00° 0.035
2.00 2.50° 0.044 4.50° 0.079
2.50 2.50° 0.044 4.50° 0.079
3.25 3.00° 0.052 3.00° 0.052
4.00 2.50° 0.044 3.00° 0.052
5.00 3.00° 0.052 3.00° 0.052
6.00 3.00° 0.052 3.00° 0.052
Spherical Bearing Mount Application