Feeder Rebuilding - Precision PMR Rotary Feeder Service Maintenance Manual

factory at .010" to .020" and should be checked on a regular basis. The clearance is set by
adjusting the set screws protruding through the feeder end bell. See Appendix #5 – "Brass end-
seal adjustment"

Feeder Rebuilding

By their nature, feeders are subject to continuous wear and the feeder's performance will
decline over time. While proper preventive maintenance and close attention to the condition
of the knife will extend the life, all feeders will eventually require refurbishment or
replacement.
Every plant has different parameters for acceptable and unacceptable feeder performance so it
is difficult for Precision to make broad recommendations for when your feeder will need to be
rebuilt. A general rule that we have found to be useful is as follows:
When the clearance between the rotor and barrel reaches approximately 2-3 times the
original factory clearance, it is time to consider the possibility of a rebuild.
Feeder rebuilds normally include:
→ A rotor rebuild that includes a ring-and-vane replacement to restore the rotor to a full
diameter
→ Replacement of bearings, shaft packing, brass endbell seals, and the knife
→ Boring the feeder barrel to a "clean-up" diameter that removes any deep gouges,
grooves, and deep pitting; followed by the application of a new industrial chrome finish
Please contact Precision for information on feeder rebuilds.
Updated June 2018
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