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Drives
Recommended Drives
Vickers units are designed for use on
direct coaxial drives using spline
connections and/or flexible couplings.
If drives imposing radial and/or axial
loads, or key drives are being
considered, consult your Vickers
representative for additional information.
Drive Alignment
Concentricity and angular alignment of
shafts are important to pump life.
Misalignment can induce heavy loads
on bearings, causing premature failure.
Flexible coupling halves must be aligned
according to the coupling
manufacturer’s recommendations.
Universal Joints
When using double universal joint
couplings, the shafts must be parallel
and the yokes must be in line. The offset
should be kept as low as possible.
Maximum allowable offset will, of
course, vary with application conditions.
The pump shaft to universal joint
diametral fit should be close (major
diameter fit) with no appreciable
looseness.
Mounting Pad Accessory Drives
A splined shaft is recommended on
applications where the pump shaft is
coupled directly into a transmission or
gear box. Spline drives should be
lubricated. The possibility of interference
between the shaft and transmission
splines, due to tolerance stack-up, can
exist. To reduce this possibility, side
tooth spline fits should be used. A side
tooth fit and short length of engagement
permits more flexibility and less
tendency for side loading than does a
major diameter fit spline or long spline
engagement.
Mounting Dimensions
Requirements
Dimensional control requirements of the
customer’s mounting pad to which the
pump or motor is affixed are as follows.
Pilot Diameter
Concentricity of the customer’s female
pilot diameter relative to the effective
axis of the female drive must be within
.10 mm (.004”) total indicator reading.
The clearance between the male and
female pilot diameters must be +.0127
to .0508 mm (+.0005 to +.0020 inch).
Mounting Face
The customer’s mounting face to which
the pump or motor is affixed must be
square to the axis of the female drive
within .04 mm per 25 mm (.0015 inch
per inch).
Shafts
Dimensions of keyed shaft receivers
must be between +.002554 and +.0254
mm (+.0001 and +.0010) of the
maximum shaft diameter shown on the
respective Vickers installation drawing.
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