Our History •
Our Facilities •
Our Process
Roll Inspection
Each roll is carefully inspected at our plant or the customer's site. A full assessment is issued prior to quote.
Customers are always welcome to inspect work while in progress or before it is shipped. Certified records of
post-work measurements and full inspection reports issued on request.
Grinding
Waldrich-Siegen grinders are positioned on their own vibration-absorbing foundations. Grinder capacities reach
diameters of 144", lengths of 600", and weights of 240,000 lbs.
Lathes
Lathe capacities reach a diameter of 62" with an over carriage up to 72" over ways. Lengths reach 668", and
weights reach 200,000 lbs. All lathes have full machining capabilities.
Superfinishing & Polishing
Surface finishes as fine as 1/4 to 1/2 micro inch Ra are routinely achieved.
Dynamic Balancing
Precise balancing machines simulate in-plant rotation prior to shipping. Here a 550" marine drive shaft is
dynamically balanced.
Dynamic Leak Testing Swim Rolls/Rebuild All Manufacturers Variable Crown Rolls
Swim rolls are leak-tested under simulated mill conditions prior to shipping. Also, many of our customers have
so much confidence in our abilities that they entrust PRG to repair and rebuild their variable crown rolls.
Precision Roll Grinders successfully rebuilds, upgrades and modifies rolls manufactured by Kusters, Valmet,
Metso, Beloit CC Series, Voith-Profil and Nipco, Hunt and Moscrop, and Farrel.
Journal Repair & Replacement
Several methods are available to bring journals back to spec. Here brush-plating applies hard alloy to repair
a worn journal surface.
Suction Rolls and Specialty Roll Rebuilds
Suction roll rebuilds (shown here), drums, take-up reels, turbine shafts, rotors, dryers, drive shafts, felt
rolls, composite covered rolls and other specialty rolls are all refurbished at PRG.
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HIGHLIGHTED CASE STUDIES
The Company
Alsco Metals Incorporated ...
The Problem
A variation in process reduced plant efficiency ...
PRG's Solution
Read more ...
The Company
Blue Ridge Paper Products, Inc ...
The Problem
Blue Ridge faced troubles after a bad grinding experience ...
PRG's Solution
Read more ...
OTHER CASE STUDIES
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