Page 87 - Paker - Medium Duty Hydraulic Cylinders

Catalog HY08-1130-4/NA Medium Duty Hydraulic Cylinders
Spherical Bearing Mount Application Series 3L Engineering Data

Application and Design Data
The spherical bearing life is influenced by many factors, For longer bearing life, regular lubrication will protect
i.e., bearing pressure, load direction oscillating angle and the spherical plain bearing from premature wear and
lubrication. The maximum operating pressure ratings of corrosion. Rust-inhibiting EP greases of lithium base,
the spherical bearing mountings are based on standard preferably with molybdenum disulphide additives are
commercial bearing ratings. The 4:1 design factor rating particularly suited. The radial bearings have lubricating
is based on the tensile strength of the material. holes and grooves in the races permitting lubrication.
The bearing housings at the cap and rod end are
The spherical bearings are dimensioned to ensure provided with grease fittings for lubrication.
a satisfactory bearing life under normal operating
conditions. The bearing races are made of through- Maximum angle of swivel in relation to the center line of
hardened steel and are precision ground. They are the pivot pin is shown as angle a in the table below. It
phosphate treated and coated with dry film lubricant to is recommended that this angle is not exceeded when
minimize friction of contacting surfaces. In the case of mounting the cylinder.
a permanent unidirectional load to the bearing, or other
unusual operating conditions, the use of a larger bearing
may be required.

Mounting Information

Head End Mounting Recommended maximum swivel angle on each side of
the cylinder centerline.
Table 1
Bore Head End Mounted Cap End Mounted
X a Ø Angle a Tan. of a Angle a Tan. of a
X a
1.50 2.50° 0.035 2.50° 0.035
2.00 2.50° 0.044 4.50° 0.079
XL + STROKE 2.50 2.50° 0.044 4.50° 0.079
3.25 3.50° 0.052 3.50° 0.052 D
4.00 2.50° 0.044 3.50° 0.052
5.00 3.50° 0.052 3.50° 0.052
6.00 3.50° 0.052 3.50° 0.052

8.00 3.50° 0.052 3.50° 0.052
Note: Dimension X is the maximum off center mounting of the
cylinder. To determine dimension X for various stroke lengths
Cap End Mounting multiply distance between pivot pin holes by tangent of angle a. For
extended position use X = XL + 2X stroke.

a X
a X

XL + STROKE

77 Parker Hannifin Corporation
Industrial Cylinder Division
www.parker.com/cylinder Des Plaines, Illinois