Pellerin Milnor Corporation 65
Measuring Unmounted Clearance and Setting Bearing (Front
or Rear)
BNWVUM02.T04 0000278712 A.3 A.5 3/12/20 11:54 AM Released
The bearings used on Milnor
®
washer and dye extractors are the very best anti-friction devices
available for these applications. However, the anti-frictional characteristics of the bearings will
be reduced if they are not properly installed. It is of critical importance when installing these ta-
pered roller bearings, to accomplish the following (A step by step procedure follows this
synopsis):
1. Accurately measure the unmounted internal clearance of the bearing (gap between the rollers
and outer race before the bearing is installed). This is an essential quality control measure.
2. Calculate the final internal clearance by subtracting the specified clearance reduction (amount
that the internal clearance must be reduced when the bearing is tightened onto the tapered
shaft) from the unmounted clearance.
3. Tighten the bearing onto the shaft until the final internal clearance as calculated is achieved
and verified by measurement.
These measurements are taken in thousandths of an inch. Although this requires precise work,
attention to detail and a good set of feeler gauges, it is the only way to insure that the bearing
will be tightened onto the shaft to precisely the right tension. If you have any questions on
performing the measurements or adjustments described below, your local bearing supplier or
the Milnor
®
factory can assist you. Although these procedures require precision over and
above that normally required for laundry room maintenance, they are standard in bearing in-
stallation and absolutely essential:
NOTE: Step 4 requires a good set of feeler gauges including .001" through .010" in
thousandths of an inch increments. Contact your local bearing supplier.
4. When you are ready to proceed (and not before), remove the new bearing from it’s box or pro-
tective wrapping. Do not attempt to clean the bearing or wash out the preservative coating.
On a clean work surface, stand the bearing on edge and insert a .003 feeler gauge into the
bearing as shown in Figure 27 . The gauge should be inserted just inside the outer race be-
tween two rollers and worked through to the opposite row of rollers. Rotate the inner race of
the opposite row so that the end of the feeler gauge is caught between a roller and the outer
race.
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