A Letter From Our President. During the current situation with the COVID-19 virus, Precision Roll Grinders remains open for business to meet all of our customers’ roll servicing needs. The health and safety of our employees, as well as our customers and partners, is of primary concern. We are monitoring the COVID-19 situation very closely, taking appropriate health measures, and are confident we can abide by locally imposed policies while continuing to seamlessly support and provide value to our customers’ business operations. If you have any questions about PRG’s accessibility or operations please do not hesitate to contact us.


Why replace expensive parts that only need repair?

Even large-scale components built to withstand the rigors of heavy-duty industrial processes need occasional maintenance. Our roll grinding experts can keep even the largest trunnion assemblies — such as for lime kilns, cement plants, paper mills or other heavy-duty industrial processes — working properly.

Our team handles repairs to mounts; bearings; arms; shafts; and lugs, pipes, rings and seals to help you address:

  • Flat-spot damage resulting from a bearing lock-up while a kiln continues to turn
  • Chatter marks (to eliminate additional chatter transfer to a larger drum ring)
  • Damaged bearing seats and seal areas
  • Journal gouges that are common following torch removal of bearing inner races
  • Bearing fits for setups involving inner races
  • Journal restoration to allow new bearing sleeves for sleeve-style bearings

See our grinding and CNC lathe capacity.


Don’t let equipment failure result in costly downtime

Due to the rare incidence of trunnion repair, most facilities have only one spare trunnion to cover all positions in the manufacturing process. A proactive approach to maintenance can eliminate costly downtime.
PRG offers emergency service as well as fabrication and grinding services for spare or new replacement trunnion assemblies to reduce downtime due to scheduled maintenance or unplanned equipment failure. We have four locations to best serve your plant’s needs.
We’ll work with your plant to:

  • Create a maintenance plan that works around your schedule.
  • Guarantee faster, easier emergency repair in the event of unplanned downtime.
  • Identify any possible areas of concern, along with your Operations Managers and Maintenance Supervisors

PRG’s service begins with a free consultation at your facility.

Call today to speak to the experts at Precision Roll Grinding

If you have any of the following issues or questions about your refiner, give us a call.
The consultation is absolutely free.

  • What are the costs for replacing a trunnion assembly? Can a trunnion assembly be repaired?
  • I’m seeing flat spot damage resulting from a bearing lock-up while a kiln continues to turn.
  • Will chatter marks cause additional chatter transfer to a larger drum ring?

  • Damaged bearing seats and seals areas are causing issues within the assembly.
  • I’m getting journal gouges following torch removal of bearing inner races.

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