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.


Special Services: Turbines, Rotors And Shafts

PRG Is Specialized To Serve Your Industry

If you are an engineer, purchasing agent, project manager or maintenance manager manufacturing or repairing turbines, rotors and shafts, PRG has a wealth of services dedicated just for you.

Listed below are typical company types that PRG works with, as well as a list of the premium services offered.

Typical Company Types Served
  • Motor Manufacturers (GE)
  • Turbine And Compressor Manufacturers
  • Forging Companies (Large Steel Shafts)
  • Turbine And Compressor Repair Facilities (Rotor)
  • Motor And Generator Repair Facilities
  • Machine Shops
  • Cylinder And Horizontal Press Manufacturers Of Pistons, Rams, Shafts And Tie Rods
  • Ship Repair Facilities
  • Pump Manufacturers
  • Hydroelectric
  • Mining Companies (Tunneling equipment)
  • Large Valve Manufacturers

  • Balancing (low speed)
  • Bearing removal for wind generators
    • Coupling fits, bearing seat repair, chrome plating, twin wire spray, housing assembly, seal replacement, ultrasonic testing, NDT
    • Housing repairs
  • Grinding: Turbines, compressors, generators
    • Thrust flanges
    • Journal diameters
    • Coupling Tapers and fits
    • Pilot Diameters
    • Spigot diameters
    • Probe areas (Burnish probe areas)
    • Electrical run out tests
    • Seal diameter
    • Bearing seats
    • Drive hubs
    • Flanges
    • Nickel plating
    • Perpendicularity to datums
    • Roundness
    • Cylindricity
    • Parallelism
    • Concentricity between datums
  • Shafts
    • Grinding to 20 millionths on radius
    • Tapers
    • Coupling fits
    • OD to ID concentricity
    • Concentricity to datums
    • Perpendicularity to datums
    • Roundness
    • Cylindricity
    • Parallelism
    • Grinding of OD, thrust flanges, end flanges, spigots, pilot diameter, counter bore machining, bearing seat seal diameters, seal grooves, locking grooves, turning, metal spray, coatings, milling and drilling, chrome plating, nickel plating
    • Concentricity between datums
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